Pensoft blog - Part 3

Ancient Penguin Fossils Offer New Window into Antarctica’s Changing Climate

A team of palaeontologists studying penguin fossils from Seymour Island have demonstrated how ancient bird bones can act as chemical archives of past climate change.

A team of palaeontologists from China University of Geosciences (Beijing) studying penguin fossils from Seymour Island off the Antarctic Peninsula have demonstrated how ancient bird bones can act as chemical archives of past climate change.

The researchers used non-destructive X-ray mapping to examine the elemental composition of penguin remains spanning millions of years. As such, they uncovered key insights into how Antarctica shifted from a warm and humid environment to a cooler world.

“Penguins are among the most iconic animals of Antarctica and represent one of the most distinctive groups of birds, having completely lost the ability to fly and instead using their flipper-like wings for swimming.

Seymour Island preserves one of the world’s richest and most stratigraphically continuous records of Eocene penguin fossils. These fossils span an important interval of Antarctic climate evolution, from the relatively warm and humid conditions of the early Eocene to the cooler climate of the middle and late Eocene.”
The Research Team

Sampling area – Tertiary Eocene La Meseta Formation on Seymour Island. Image credit: Boyang Xia et al.
Sampling area – Submeseta Formation on Seymour Island. Image credit: Boyang Xia et al.

To study the rare fossils without damaging them, the researchers used micro-X-ray fluorescence scanning to map chemical elements across the surface of the bones. The scans revealed clear differences in the chemical composition of bones from different geological periods.

Older fossils dating back roughly 55 million years contained significantly higher levels of titanium, silicon and potassium. The team linked these chemical patterns to intense land-based weathering and heavy runoff during an ancient warm period, whereas younger fossils from cooler periods showed much lower elemental signals.

“The most surprising result was that the early Eocene fossil showed substantially higher titanium, silicon and potassium signals.

Based on the stratigraphic, sedimentological and palaeoclimatic evidence, we interpret this pattern as being consistent with stronger continental weathering and terrestrial material input under the warm and humid conditions of the early Eocene.”

Analysing millions-of-years-old fossils presented distinct practical challenges:

“One of the main challenges was obtaining reliable elemental information without damaging the fossils.

The irregular shapes and curved surfaces of the fossil bones created practical difficulties during scanning. To minimise the influence of variations in surface height, we positioned the bones as horizontally as possible and maintained a relatively constant distance between the scanning head and the bone surface.”

Overview of the fossil specimens and the µ-XRF scanning area. Image credit: Boyang Xia et al.

Beyond tracking weather conditions on land, the scanning method also detected iron, manganese and sulphur patterns trapped within the bones, reflecting local chemical changes in the marine sediment as the fossils were buried over time.

The team additionally highlights that studying bone geochemistry offers a valuable tool for understanding historical Earth systems alongside traditional techniques such as marine sediment drilling and microfossil analysis.

“An important finding for us was that the elemental information preserved in penguin bones may record not only how external materials entered the bones, but also differences in weathering input, depositional conditions and early diagenetic environments.

We believe that fossils can provide an important complementary source of information for studying palaeoenvironmental changes on the Antarctic Peninsula.”

The study, published in the open-access journal Fossil Record, demonstrates how combining non-destructive chemical scanning with established geological context can unlock valuable environmental data from fossil collections, thus broadening the scope of future polar research.

Original source:

Xia B, Wu H, Li Q (2026) Eocene penguin fossils as archives of Antarctic weathering and climate change: insights from micro-X-ray fluorescence elemental mapping. Fossil Record 29(2): 575-587. https://doi.org/10.3897/fr.29.192319

For more articles on palaeontology, visit the Fossil Record website and follow the journal on BlueSky and Facebook.

A Coral Among the Stars: New Species Discovered on Costa Rica’s Deep-Sea Seamounts

The coral was found thriving in large numbers on rocky outcrops that were almost entirely blanketed by brittle stars.

Scientists exploring seamounts off the coast of Costa Rica have discovered a new coral so genetically and morphologically distinct that it required the creation of an entirely new family for its classification.

Bright yellow and tree-like, the coral was found growing some 360 to 529 metres beneath the surface of the Pacific. The discovery is described in the open-access journal ZooKeys.

Map showing the geographic location of the collected samples within the Pacific Exclusive Economic Zone (EEZ) of Costa Rica. Made by Beatriz Naranjo (UCR).

The colonies, which can grow to over a metre tall, were collected using the remotely operated vehicle SuBastian aboard the research vessels Falkor and Falkor (too), operated by the Schmidt Ocean Institute, during expeditions to the seamounts off Isla del Coco and the Costa Rican Pacific margin in 2019 and 2023.

Researchers found the coral thriving in large numbers on rocky outcrops that were almost entirely blanketed by brittle stars, creating a shimmering, star-strewn seafloor from which the golden coral branches rose like glowing trees.

That image inspired the coral’s name. The new genus, Laurinque, comes from “Laurinquë”, meaning “golden tree” in Quenya, the Elvish language devised by J.R.R. Tolkien for The Lord of the Rings and The Silmarillion, chosen in reference to the colonies’ bright yellow, tree-like form.

*Laurinque* *elenya* gen. et sp. nov., morphology of the holotype, *in situ*. Photographs by ROV *SuBastian*.

The species name, elenya, is Quenya for “stellar” or “of the stars”, a nod to the fields of brittle stars among which the coral was discovered. Together, the pairing evokes a scene the researchers likened to a mystical elvish landscape on the deep seafloor.

Working out where this coral belonged in the coral family tree proved unusually difficult. The team sequenced three genes commonly used to classify corals, and each one pointed to a different, unrelated family, an unusually high level of disagreement.

Holotype (ethanol preserved fragment) detail of anthocodiae and polyp arrangement of *Laurinque* *elenya*. Photographs by Fiorella Vásquez (UCR).

To settle the question, researchers turned to phylogenomics, analysing hundreds of genes at once. This revealed that the coral does not belong to any known family at all, but represents a unique evolutionary lineage most closely related to the family Eunicellidae, but distinct enough in both its genetics and its anatomy to warrant a new family, Laurinqueidae, and a new genus, Laurinque, built specifically to house it.

“I saw the octocoral garden for the first time in 2019 and I was impressed by the beauty of the landscape, which inspired, later the elvish name of the taxa. I thought the species could belong to a known family and genera, but after the preliminar morphological analysis I realised that it was something very different that I could not match with the known taxa.

In 2023 we collected more samples and thanks to the exhaustive molecular analyses made by my colleagues, Cathy McFadden, Catalina Murillo and Andrea Quattrini, we were able to determine the taxonomic placement of the stunning species, in one of the most enigmatic sites.”
Dr Odalisca Breedy of the Universidad de Costa Rica

*Laurinque* *elenya* gen. et sp. nov., *in situ* colonies in Las Gemelas II. Photographs by ROV *SuBastian*.

The research was led by Dr Breedy, working alongside an international team of collaborators. The expeditions were supported by the Schmidt Ocean Institute and a National Geographic Society research grant.

The discovery adds to a growing list of undocumented species being revealed on Costa Rica’s seamounts, and demonstrates how much of the deep ocean, which covers roughly two-thirds of the planet’s surface, remains unexplored.

Coral gardens such as these are considered vulnerable marine ecosystems, providing structurally complex habitat for a wide range of other deep-sea life.

Cover image

In situ colony of Laurinque elenya gen. et sp. nov. in Las Gemelas II. Credit: ROV SuBastian.

Original source

Breedy O, McFadden CS, Murillo-Cruz C, Yánez-Suárez A-B, Robert K, Quattrini AM (2026) A coral among stars: A new octocoral family (Anthozoa, Octocorallia, Malacalcyonacea) from seamounts in the tropical eastern Pacific. ZooKeys 1283: 253-272. https://doi.org/10.3897/zookeys.1283.191899

For more articles on zoology, visit the ZooKeys website and follow the journal on BlueSky and Facebook.

New Mountain Dragon Lizard From Thailand Named After Syrax From House Of The Dragon

Meet Acanthosaura syrax, the mountain horned dragon lizard named after Syrax – Queen Rhaenyra Targaryen’s dragon in House of the Dragon.

Scientists have described a new species of lizard from the high mountain forests of western Thailand, and have given it a name straight out of fantasy television: Acanthosaura syrax, named after Syrax, the dragon ridden by Queen Rhaenyra Targaryen in House of the Dragon.

adult female Acanthosaura syrax — Adult female paratypes of *Acanthosaura* *syrax*. Photo credit to Trivalairat et al., 2026.

The lizard belongs to a group known as mountain horned dragons, agamid lizards recognised by the spiny crests running along their neck and back. It was discovered in the evergreen forests of Mae Wong National Park, in the Tak-Kamphaeng Phet Province, at elevations above 1,300 metres, where it appears to live nowhere else. The find brings the total number of known species in the genus Acanthosaura to 23.

Forest habitat of *Acanthosaura* *syrax* in Mae Wong National Park, Mae Wong District, Kampheang Phet Province, Thailand . Photo credit to Trivalairat et al., 2026.

The research team, led by Poramad Trivalairat and colleagues from Chulabhorn Royal Academy and Kasetsart University, chose the name Syrax deliberately. The dragon of that name in the fantasy world is known for its striking yellow colouring, its comparatively modest size next to other dragons, and for producing an unusually large number of eggs.

The researchers found all three qualities echoed in the real animal: A. syrax has yellowish-green tones in its colouring, is one of the smallest members of its genus, and lays notably large clutches of eggs for its size. The team has proposed “Syrax mountain horned dragon” as its English common name, alongside a Thai name that translates the same way.

Adult male holotype of Acanthosaura syrax. from Mae Wong District, Kampheang Phet Province, Thailand. Photo credit to Trivalairat et al., 2026
Adult female paratypes Acanthosaura syrax. Credit to Trivalairat et al., 2026.

Beyond the name, the lizard stands out for possessing the smallest neck and back crest scales recorded anywhere in the genus, along with an overall small body size. It also lacks a black patch around the eye seen in several related species, and has a distinctive dark collar marking. DNA analysis of two genes backed up what the researchers saw by eye, showing that A. syrax is genetically distinct from its closest relative, A. lepidogaster, and from every other known species in the group.

Paratype specimens of Acanthosaura syrax — Paratype specimens of *Acanthosaura* *syrax*. Credit to Trivalairat et al., 2026.

The species appears to be confined to a narrow band of high-altitude forest, and the researchers say its populations are naturally scattered by the rugged terrain of the mountain range, a state of affairs that leaves it vulnerable should its habitat come under further pressure. They are calling for stronger protection of Mae Wong’s high-elevation forests, suggesting the new lizard could serve as a flagship species for the area alongside other rare wildlife found there, including the Asian forest tortoise, Oldham’s leaf turtle and the Indochinese tiger.

The study is published in the open-access journal ZooKeys.

Cover photo credit: Acanthosaura syrax, credit to Trivalairat et al., 2026; Syrax dragon credit to Wiki of Westeros.

Original source:

Trivalairat P, Trivalairat K, Moungkhaek N, Caponov S, Lorsunyaluck B (2026) Acanthosaura syrax sp. nov., a new species of mountain horned dragon from high-elevation habitats of western Thailand (Squamata, Agamidae). ZooKeys 1287: 47-76. https://doi.org/10.3897/zookeys.1287.186636

Landmark review confirms 227 mammal species in Honduras, the country’s most comprehensive assessment in nearly three decades

The study also forecasts that as many as 28 further species could eventually be confirmed in the country.

An eight-year international research effort has produced the most comprehensive review of Honduras’ mammals since 1998, verifying 227 native species across 146 genera and 42 families, along with three introduced rodent species. The study, published in the open-access journal ZooKeys, also forecasts that as many as 28 further species could eventually be confirmed in the country, bringing the potential total to 258.

Manatee, photographed by Daniel Gonzalez-Socoloske.

The research was led by Manfredo A. Turcios-Casco of the Asociación para la Sostenibilidad e Investigación Científica en Honduras (ASICH) and the Universidade Estadual de Santa Cruz in Brazil, together with 14 co-authors from institutions across Honduras, the United States, Brazil, Guatemala and Costa Rica, including Panthera Honduras, the Smithsonian Institution and the Wildlife Conservation Society. The resulting work spans nearly 200 pages of species accounts, distribution data and conservation summaries.

The project began when Turcios-Casco was a master’s student researching the conservation status of Honduran xenarthrans:

“At that time, I realised something surprising: despite Honduras being one of the most biodiverse countries in Central America, its mammal fauna had not been comprehensively reviewed since 1998.

What began with a team of four researchers grew into a collaboration spanning museum curators, taxonomists, field biologists and conservation practitioners across multiple countries.”

Compiling the review meant verifying more than 300,000 records drawn from museum collections, scientific publications, technical reports and previously unpublished field observations dating back to the 1960s.

Mormoops megalophylla. Image credit: Manfredo A. Turcios-Casco.

“The greatest challenge was undoubtedly the verification process. Every record (and there were more than 300,000) had to be evaluated critically,” Turcios-Casco said, noting that shifting taxonomy meant the team was still updating species accounts just days before the manuscript’s final submission.

Among the review’s more unexpected findings was how little is known about some of Honduras’ most familiar mammals. “For some mammals, including squirrels, raccoons, and several small rodents, there were no modern distribution maps available,” Turcios-Casco noted. Even regionally widespread species, such as opossums and skunks, remain poorly documented within the country.

Nyctomys sumichrasti. Image credit: Manfredo A. Turcios-Casco.
Spilogale angustifrons. Image credit: Manfredo A. Turcios-Casco.
Caluromys derbianus. Image credit: Manfredo A. Turcios-Casco.

Alongside the species accounts, the review provides conservation summaries intended to guide research priorities and policy decisions:

“Because conservation begins with knowledge. One of the biggest challenges in biodiversity conservation is that we often want to protect species before we fully understand them.”
Turcios-Casco

Camera traps photos by Panthera-Honduras – White lipped peccaries.
Giant anteater.
Tapirs.
Puma.

The work also draws on cultural knowledge, incorporating common names used by Indigenous peoples and local communities alongside the scientific record.

“Rather than simply compiling species records, we tried to tell the story of Honduras’ mammals.”
Turcios-Casco

Looking ahead, the authors hope the review will serve as a foundation for the next generation of Honduran biologists.

“In that sense, the review is both a summary of what we know and a reminder of how much there is left to learn about the natural heritage of Honduras.
Turcios-Casco

Cover image:

Howler monkey, photographed by Daniel Gonzalez-Socoloske.

Original source:

Turcios-Casco MA, Castañeda F, Wilson DE, Miller B, Gonzalez-Socoloske D, Ramos EA, King TW, LaVal RK, Ordóñez-Garza N, Ordoñez D, Graciolli G, Thornton D, Martínez M, Estrada-Andino NM, Ávila-Palma HD (2026) Taxonomy, natural history, and conservation of the mammals of Honduras. ZooKeys 1288: 1–193. https://doi.org/10.3897/zookeys.1288.129555

Call to contribute to a Special Collection “Vegetation of the Balkan Peninsula” in Vegetation Classification and Survey

A newly launched Special Collection “Vegetation of the Balkan Peninsula” in the open-access, peer-reviewed IAVS journal is now welcoming submissions.

Guest blog post by Jürgen Dengler, Erwin Bergmeier and Urban Šilc

We are pleased to announce the Special Collection on the vegetation of the Balkan Peninsula in IAVS’ gold open access journal Vegetation Classification and Survey (VCS).

This Special Collection is launched in conjunction with the annual conferences of two IAVS Working Groups in 2026, namely the 21^st Eurasian Grassland Conference of the EDGG in Sofia, Bulgaria, and the 34th Conference of the European Vegetation Survey (EVS), in Clermont-Ferrand, France.

Within Europe, the vegetation of the Balkan Peninsula is particularly diverse yet understudied in terms of composition, variation and range. With this Special Collection, we thus want to advance the knowledge on the Balkan vegetation, take a fresh look both within and beyond national borders and contribute to an improvement of the “EuroVegChecklist” as the common syntaxonomic backbone of the continent. Following VCS’s scope, contributions either need to develop or to apply a vegetation classification framework of any type. For example, this can be based on a phytosociological classification system, habitat types, or synusiae. Studies on any kind of vegetation from the coasts to the highest mountains, from natural through semi-natural to anthropogenic are welcome.

We envisage particularly the following types of contributions:

Revisions of syntaxa (classes, orders, alliances…) at the national or supranational level
Vegetation monographs of a certain region
Synthetic overviews (category Review and Synthesis) of all syntaxa of a country or other larger regions
Nomenclatural proposals related to Balkan syntaxa
Habitat typologies and their application
Long and Short Database Reports
Perspectives on how to harmonize and how to utilize syntaxonomic knowledge

Apart from Research Papers, also Reviews and Syntheses and Forum Papers as well as Long Database Reports and Nomenclatural Proposals are welcome. We hope to see submissions from the Balkan countries (Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, Kosovo, North Macedonia, Albania, Bulgaria, Greece and Turkey-in-Europe), while syntheses across multiple countries are particularly welcome. Please consult the author guidelines whose formal requirements also apply to the Special Collection.

Editors: Jürgen Dengler (Switzerland), Erwin Bergmeier (Germany) and Urban Šilc (Slovenia); in case of a high number of submissions, one or two additional guest editors might be appointed.

Procedure and deadlines:

Until 31 October 2026: Please submit your (preliminary) abstract online at: https://forms.gle/gxofv8FuZQkqFmeK7. The abstract must follow the VCS Author Guidelines.
Until 30 November 2026: The Guest Editors will evaluate the abstracts and inform the authors which manuscripts are invited for submission.
Until 30 May 2027: Invited manuscripts can be submitted at: https://vcs.pensoft.net/
Spring 2028: The Special Collection will be completed with a synthesizing editorial by the Guest Editor team.

Please note that VCS is a gold open access journal where authors are normally required to pay article processing charges (APCs). First authors who are IAVS members receive 50% or 75% discount on regular APCs. If you are an IAVS member but cannot afford the reduced APCs (e.g. because your university does not provide APC funds), you can – after invitation and prior to submission – apply to IAVS’ Global Sponsorship Committee (GSC) for a complete waiver of the APCs, i.e. publishing free of charge. If interested, please get into contact with the chair of the Guest Editors.

We look forward to receiving your contributions and hope that you will join us in making this Special Collection a valuable resource for the IAVS community.

Follow Vegetation Classification and Survey on Facebook and Bluesky to stay up to date on the journal’s latest developments. Or subscribe to the journal’s newsletter via the homepage.

Pensoft Joins the Global Lichenology Community at IAL10 in Trieste

The 10th Symposium of the International Association for Lichenology took place in Trieste, where Pensoft showcased its plant science and mycology journal portfolio.

Last week, the 10th Symposium of the International Association for Lichenology (IAL10) took place in Trieste, Italy, from 26 to 31 July 2026, organised by the International Association for Lichenology, the University of Trieste’s Department of Life Sciences and the Italian Lichenological Society.

Held once every four years, the symposium is an important event for the global lichenology community, and this edition proved more popular than ever, drawing over 350 participants from around the world – more than double the number originally expected.

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Lichenology is a wonderfully niche field, but IAL10 showed just how far-reaching and collaborative the community is. Delegates travelled from every corner of the globe to discuss taxonomy, lichen-associated microorganisms, biodiversity and conservation, ecophysiology, environmental biomonitoring, and cultural heritage preservation.

Pensoft’s stand at IAL10

Maria Kolesnikova, our Head of Marketing, Sales and Events, at the Pensoft stand at IAL10.

We were pleased to have our own stand at the symposium, where we showcased our journals in plant science and mycology, including:

MycoKeys: publishes papers on the monophyletic kingdom Fungi containing taxonomic or ecological data on any taxon of any geological age from any part of the world with no limit to manuscript size;
IMA Fungus: considers contributions from all areas of mycology expected to be of interest to the wider mycological community, from basic research to applications
PhytoKeys: publishes papers in systematic Botany containing taxonomic/floristic data on any taxon of any geological age from any part of the world
Italian Botanist: publishes original research covering all fields of Botany in its wider sense, including Mycology, ranging from molecular to ecosystem studies
Biodiversity Data Journal: publishes papers in biodiversity science containing taxonomic, floristic/faunistic, morphological, genomic, phylogenetic, ecological or environmental data on any taxon of any geological age from any part of the world
Vegetation Classification and Survey: publishes original papers that develop new vegetation typologies as well as applied studies that use such typologies, for example, in vegetation mapping, ecosystem modelling, nature conservation, land use management or monitoring

Pensoft’s journals in plant science and mycology.

It was a great opportunity to speak directly with researchers and students about publishing their work, and to reconnect with authors and editors already part of our community.

Garima Singh – Subject Editor and Author in MycoKeys.
Muhammad Usman, Author in MycoKeys.
Edyta Mazur – Author in Mycokeys.
Pier Luigi Nimis – Subject Editor and Reviewer in MycoKeys.

Talks that caught our attention

Among the many excellent presentations at IAL10, two in particular stood out to us:

Juri Nascimbene presenting his talk at IAL10 – Historical lichen collections as a time capsule.
Juri Nascimbene at Pensoft’s stand.

Juri Nascimbene, a subject editor and author at MycoKeys and an author for Italian Botanist, Vegetation Classification and Survey, and Biodiversity Data Journal, presented on the historical lichen collections held at the University of Bologna’s herbarium (BOLO). His talk explored how these collections, some dating back to the work of Ulisse Aldrovandi in the sixteenth century, allow researchers to track species distributions across centuries.

Using material such as Antonio Bertoloni’s Hortus Siccus Florae Italicae, which contains 850 georeferenced lichen specimens, Nascimbene’s team has been able to trace the long-term presence of species such as Lobaria pulmonaria in the chestnut groves of the Northern Apennines, and the disappearance of cold-adapted species such as Alectoria ochroleuca from high-altitude sites.

It was a fascinating look at how historical herbaria can inform our understanding of global change today!

Martin Grube presenting his talk at IAL10 – Lichens in motion.

We also attended a talk by Martin Grube, a reviewer and author at MycoKeys, who challenged the common perception of lichens as slow-growing organisms. His presentation examined the hygroscopic movements lichens undergo as they take up and lose water, and the mechanical stresses this creates within their thalli.

Grube introduced tools for measuring these mechanical properties and discussed what they might reveal about the evolution and function of lichen structures, thus offering a compelling primer on comparative thallus mechanics.

A new special issue in MycoKeys

While at IAL10, we were pleased to announce a new special issue in MycoKeys: Proceedings of the 10th International Conference of the International Association for Lichenology (IAL10), edited by Mauro Tretiach, Fabio Candotto Carniel, and Lucia Muggia. The special issue will bring together original research articles and short communications covering the full breadth of lichen symbiosis research. We look forward to seeing the community’s latest work published there.

Announcement of a special issue in MycoKeys at IAL10.

Celebrating the award winners

Congratulations to all of this year’s IAL10 award winners:

Group photograph of the award winners at IAL10.

Best Posters

Honorata Wacławek, “Phylogenetic insights into freshwater Gyalidea (Gomphillaceae, Graphidales) from the high Andes of Bolivia”
Ariel Sebastián Udaeta Sanchez, “First axenic cultures of saxicolous lichens from Tucumán (NW Argentina): growth timelines and representation of under-studied neotropical lineages”

Best Flash Talks

Ciaran Kelly, “Comparative genomic analyses of antimicrobial proteins encoded by lichen-forming fungi”
Anna Pasinato, “The metabolic divide: fungal genomes reveal an unequal distribution of biosynthetic gene clusters”

Best Oral Presentations

Victoria K., “Hidden cohabitants: metagenomic insights into global occurrence patterns of black fungi associated with lichens”
Diego Garfias Gallegos, “Central metabolism and development are rewired in lichenized cyanobacteria”

Until next time

IAL10 was a wonderful opportunity to reconnect with the lichenology community, and we were delighted to meet so many authors from our journals in person. Thank you to everyone who stopped by our stand, attended a talk with us, or simply shared a conversation about lichens.

We look forward to continuing our collaboration with the Italian Lichenological Society and seeing you all again at the next symposium.

Follow us on Bluesky, Facebook, X, and LinkedIn for future conference updates.

A Cretaceous Cold Case: The mysterious affair at Mullurina Mayu (Bolivia)

This study reports a large bowl-shaped depression from Late Cretaceous fluvial deposits in Bolivia, associated with sauropod trackways.

Guest Blog Post by Lara Sciscio and Christian A. Meyer

This study, published in Fossil Record, reports a large bowl-shaped depression from Late Cretaceous fluvial deposits in Bolivia, associated with sauropod trackways. Its morphology and scratch-like traces suggest a biogenic origin, possibly representing titanosaurid digging behaviour or an abandoned nest.

A good mystery always starts with a clue of something that was or shouldn’t have been…

Drone overview of the outcrop in the western part of the Maragua Syncline, Bolivia. Can you spot the palaeosurface with titanosaurid trackways?

The sun beats down on the Bolivian Altiplano as we walk across the rocky grey expanse of a now ancient riverbed, following a trail of fossil sauropod dinosaur tracks. We are in the Maragua region, near Sucre, in the heart of Bolivia.

Studying the trackways, we know they were made by titanosaurs, one of the largest long-necked dinosaurs to have walked the Earth. Then we stop. Within these trackways there lies a large bowl-shaped depression, seemingly carved into the rock. It is ~4 metres wide and over half a metre deep with a frayed, ragged margin.

It is unlike anything our ichnologist eyes have seen before.

Drone view of the Mullurina Mayu surface with the circular structure. Parallel sauropod (titanosaurid) trackways diagonally cut across the surface. Two people are the base of the outcrop are for scale.

Stepping closer, we realise that this is a rare oddity cut into the palaeosurface, and a slew of questions arises: Is this hollow formed by weathering, carved by modern waters? Or is it something older, potentially dug by the largest animals to ever walk the Earth? And then frozen in time?

Excavating loose sand from the structure before taking close-up photos for 3D modelling. In the foreground are titanosaurid tracks.

These questions led us on a scientific detective hunt that stretched back 67 million years, to when titanosaurs walked this part of the Earth. And just short of the asteroid impact that would bring the “Age of Dinosaurs” to an end.

Weathering… or Dinosaurs?

Usually, when we encounter oddly shaped depressions in the rock record, ~99% of the time, the explanation for their formation is weathering and erosion. Nevertheless, you gather evidence and then use it to determine how and what happened. These were our first priorities on encountering the Mullurina Mayu bowl-shaped depression.

As we examined the site in detail, those potential abiotic explanations soon began to fall apart. Hydraulic scours usually have smooth walls and are aligned with the flow of water; weathering pits leave characteristic weathering textures and are grouped in smaller concentrations. This bowl structure had neither, and instead, we noticed many parallel grooves grouped in bundles and oriented around its walls and near its base.

It became evident that abiotic mechanisms were unlikely, and these potential abiotic tool marks (a type of sedimentary structure) were biotic in nature. The presence of these scratch-like marks, their shape, orientations, and distribution indicated that something had been digging.

Close-up of scratch-like marks within an imprint inside the depression (scale bar: 20 cm).

Fingerprints

Our evidence was not in the shape of the depression itself, but the multitude of scratch traces around its perimeter. The walls carried bundles of parallel grooves, ~1 cm wide, several cm’s long, and other isolated claw traces preserved in what would have been mud. These traces were not random but oriented in two directions and indicate movement of an animal’s autopod.

Scratch-like traces associated with sauropod tracks are features known to ichnologists, although a rarity, and have been encountered at several sites, from Colorado (USA), Spain, to Mongolia. Recent discoveries in Mongolia have shown that sauropod feet could leave detailed impressions of their keratinised scales (“fingerprints”). These produce distinct striations, and their patterning and the elongate incisions are evidence that their feet moved through or across the sediment.

The grooves in Bolivia closely resemble those skin-drag traces made by a scaled foot as it repeatedly scraped its feet through and across the muddy riverbank sediment. We infer this as behavioural evidence of an animal, and the most likely is the titanosaur which left its footprints nearby. We had found fingerprints of a titanosaur, excavating, but excavating what?

Building a nest?

This is a question that many may ask: could the titanosaurs be trying to construct a nest? The answer – maybe.

There is a limited body of evidence of nesting scrapes in the fossil record. They are described as depressions which cut into the original sediment (tick), have a distinct rim (tick), and would later be infilled with different sediment (tick!). The strongest evidence for a nest structure, however, would be the presence of eggs, eggshell, or embryos, and this is still missing at the Mullurina Mayu depression. This makes our assumption of nesting less confident.

Instead, we can use the evidence we have to say it was most likely a sauropod dinosaur, using its scaley feet, that excavated the ground, and one possible explanation is that this is an abandoned nesting attempt. Ichnologists advance only because we make careful probabilities rather than claiming certainties where evidence is absent. Nonetheless, this is an exciting discovery for what it shows and for where it leads our imaginations!

What were they doing?

Body fossils (bones) tell us what animals look like, tracks tell us how they moved, how big they may be, and traces like the Mullurina Mayu depression give us a small glimpse of what they were doing. The ichnological (trace) fossil record often captures moments of an animal’s life. Here, we can see a giant titanosaur scraping, digging, and interacting with the environment rather than just looking at its bones.

Whether it was nest scraping, digging for fresh water or mineral salts (like modern elephants) or carrying out some other behaviour we have yet to recognise, what we do know is that the most interesting fossils are not of the animals themselves but the traces of their behaviours, short time shots of their lives, frozen and fossilised in the rock record.

Cover image:

Artistic reconstruction of the Mullurina Mayu bowl-shaped depression during the Late Cretaceous, depicting the probable tracemakers responsible for the Calorckosauripus trackways and possibly the bowl-shaped depression. Illustration by Joshua Knüppe (commissioned 2025).

Original source:

Meyer CA, Heymann JH, Ibarra EC, Flores EL, Sciscio L (2026) Digging Sauropods: excavation behaviour or evidence for nest building? An example from the Late Cretaceous El Molino Formation (Maragua, Bolivia). Fossil Record 29(2): 519-532. https://doi.org/10.3897/fr.29.198794

For more articles on palaeontology, visit the Fossil Record website and follow the journal on BlueSky and Facebook.

Pensoft at ESA 2026: Connecting with the Ecology Community in Salt Lake City, USA

Between 26-31 July, Pensoft Publishers joined more than 2,600 ecologists, researchers, and conservation professionals in Salt Lake City for the 111th Annual Meeting of the Ecological Society of America (ESA2026).

Pensoft Publishers joined more than 2,600 ecologists, researchers, and conservation professionals in Salt Lake City for the 111th Annual Meeting of the Ecological Society of America (ESA2026) between 26-31 July.

Table of Contents

Ecology in an Era of Uncertainty
The Opening Session
Pensoft’s booth
Two Interactive Activities at Our Booth
1. The Pensoft Species Quiz
2. The Agricultural and Environmental Modelling Poster Award
Looking Ahead

Ecology in an Era of Uncertainty

Opening ceremony of ESA 2026.
Opening ceremony of ESA 2026.

This year’s conference theme, “Ecology in an Era of Uncertainty,” could not have felt more timely. Uncertainty is nothing new to ecological research – it’s built into measurements, mechanisms, and predictions.

But new sources of uncertainty are now reshaping the field: the rise of artificial intelligence, post-pandemic shifts in career development, and growing instability in research funding. Throughout the week, the ESA community came together not only to share cutting-edge ecological research, but also to think collectively about how to navigate these emerging challenges – trading multidisciplinary, creative solutions to keep the field resilient in the face of what’s next.

The Opening Session

The Grand Ballroom was packed for the opening session, where Conference Chairs Daniel Stover and Andrea Swei welcomed attendees. Despite a challenging year for funding and travel, the 111th annual meeting of ESA 2026 hosted 2,600 registered attendees 330 sessions and 884 posters,

The opening address was delivered by Diane Pitaki, Chief Scientist and Vice President for Science at the National Wildlife Federation, who spoke about ecology standing at a crossroads amid the biodiversity crisis and shifting political headwinds, urging the community to actively “defend conservation science.”

Among the meeting’s standout moments was the plenary from Tanya Berger-Wolf, Professor of Computer Science and Ecology at Ohio State University and a leading figure in AI for ecology and biodiversity.

Notably, Berger-Wolf will be a keynote speaker at TDWG 2026 in Oslo (20-25 September) – where Pensoft Publishers will once again be exhibiting, so stay tuned for future updates.

Pensoft’s booth

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Situated right at the entrance of the exhibition hall, Pensoft’s booth revelled in attention from attendees throughout the week.

Pensoft’s team at ESA 2026 in Salt Palace Convention Center.
Pensoft’s busy stand at the 111th Annual Meeting of the Ecological Society of America.
Pensoft’s busy stand at the 111th Annual Meeting of the Ecological Society of America.
The beautiful Denitsa Peneva’s illustrations at ESA 2026.

A particular highlight was our trio of diamond open-access journals – free to publish in and free to read – that drew considerable interest from attendees:

Individual-Based Ecology promotes a distinctive individual-based perspective on ecology, aiming to bridge individual behaviour and broader ecological patterns.
Advances in Pollinator Research is designed as an innovative platform for the full spectrum of pollinator science, from pollination ecology and pollinator-plant interactions to molecular ecology, conservation, and more.
Agricultural and Environmental Modelling (AEM), meanwhile, offers an innovative approach to publishing, dedicated to advancing both the science and practice of modelling across agriculture, food systems, natural resources, and environmental sciences.

Brochure of the diamond open-access Individual Based Ecology Journal.
Close up photo of the Advances in Pollinator Research brochure at ESA 2026.
Nicole Nogoy, managing editor of Agricultural and Environmental Modelling at ESA 2026.

Attendees curious about AEM had the chance to speak directly with its Managing Editor, Nicole Nogoy, who was on site throughout the conference to discuss publishing opportunities and promote the journal’s search for Subject Editors.

The booth also gave visitors a window into the rest of Pensoft’s open-access portfolio. On the conservation side, that meant Nature Conservation and Neotropical Biology and Conservation; on the ecosystem side, One Ecosystem, Frontiers of Biogeography, and NeoBiota.

NeoBiota brochure presented at ESA 2026.
Neotropical Biology and Conservation brochure at ESA 2026.

Attendees also had the chance to learn more about our diamond open-access journal Estuarine Management and Technologies, which was accepted into the Directory of Open Access Journals (DOAJ) earlier this year.

Estuarine Management and Technologies brochure.

Rounding out the display were several more specialised titles: Biodiversity Data Journal and Metabarcoding and Metagenomics; Quite popular amongst the visitors were also our our fungi-focused IMA Fungus and MycoKeys journals; and our vegetation titles, Vegetation Classification and Survey and Vegetation Ecology and Diversity.

We also introduced attendees to our newest addition, the diamond open-access Journal of Regeneration. For those interested in sharing early-stage research or project outcomes, Research Ideas and Outcomes (RIO) offered another avenue worth exploring, publishing everything from project proposals and data to policy briefs and null results.

Those looking for a new publisher or white-label solutions had the opportunity to explore ARPHA, Pensoft’s own publishing platform, which supports the full journey from manuscript writing and peer review to publication, dissemination, and archiving – all in one seamless workflow.

Combined brochure of EU-Funded project in which Pensoft participates.

Beyond the journals and publishing solutions, the team took the opportunity to spotlight some of Pensoft’s ongoing EU-funded projects, including our pollination initiatives and our continued work with eLTER.

Two Interactive Activities at Our Booth

Building on the success of interactive formats at previous events, namely the Fortune Wheel at the 8th European Congress of Conservation Biology in Leiden, our team brought two activities to ESA2026.

The Pensoft Species Quiz

Attendees taking our fun quiz at ESA 2026.

This time around, our team created “Pensoft Species Quiz,” challenging booth visitors to identify the correct Latin name for a series of species beautifully illustrated by Denitsa Peneva. Being more than just a fun activity, it became a natural conversation starter – leading into deeper discussions about Pensoft’s journals, services, and potential collaborations with attendees.

Some of the winners from our quiz at ESA 2026.
Some of the winners from our quiz at ESA 2026.
Happy winners from our interactive quiz game at ESA 2026.
Attendees interacting with our fun quiz.

The Agricultural and Environmental Modelling Poster Award

AEM’s Managing Editor – Nicole Nogoy ran a poster competition at the meeting, and it turned out to be one of the highlights of our week. Three researchers stood out:

Julian Resasco (University of Colorado, Boulder) took home the prize for overall best presentation with a hand-drawn comic-book poster on climate change effects on Basque country thistles;
Gwendolyn Lloyd (Indiana University) impressed us with her research on arthropods and mites in agricultural soils;
Emily Redding (Fort Hays State University, KS) joined in with a poster on fire suppression’s effects on Juniper-dependent bird species, having been inspired to bring modelling into her own research.

We also took part in a raffle organised by ESA, to which each exhibitor contributed a prize.

Kanchana Balasubramanian one of the winners of Pensoft Publishers’ raffle prizes at ESA2026.
Elizabeth Afkhami Searcy received our book “Mapping Ecosystem Services” as part of the Ecological Society of America’s conference raffle.

Looking Ahead

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ESA2026 was a strong reminder of just how much energy – and uncertainty – is currently shaping the ecology community. Between thought-provoking plenaries on AI and conservation science, engaging conversations sparked by our species quiz, and the enthusiasm we saw around the AEM poster competition, it was a week full of meaningful connections for Pensoft.

We’re already looking forward to the next time, and we hope you’re looking forward to it, too!

Keep up with future updates and news by following us on Bluesky, Facebook, X, and LinkedIn.

China’s First Cave-Dwelling Freshwater Snail Named After A Mythical Mountain God

This study marks the first freshwater cave snail ever recorded in China, and it represents the highest-altitude distribution known among cave-dwelling species in the family Erhaiidae.

Recently published in the journal Subterranean Biology, the research marks a major milestone for the study of subterranean aquatic life in East Asia. Prior to this discovery, there were no records of freshwater cave snails within Chinese territory, and the region’s subterranean freshwater mollusks were generally poorly studied.

Mythological Namesake and Unique Adaptations

Perfectly suited to its pitch-black environment, Erhaia dijiang is a true troglobiont, having evolved without eyes entirely while its ocular structures show total degeneration. Its shell is small, conical, and highly translucent, while its body is delicate and unpigmented, with slender tentacles.

Natural habitats of *Erhaia* *dijiang*. Credit to He et al., 2026.

Fittingly, researchers named the species dijiang after “Di Jiang,” a mountain patron god from ancient Chinese mythology described as a faceless beast in the classic text Classic of Mountains and Seas (山海经). The name suits the animal’s habits: in laboratory observations, the snails proved highly photophobic, actively seeking out dark crevices beneath rocks to escape light.

Beyond its mythological namesake, the species is also notable for where it was found. Discovered at an elevation of 2,062 meters, Erhaia dijiang sets a new record for the highest-altitude distribution among all known cave-dwelling snails in Erhaiidae, evidence that freshwater cavesnails can survive in karst caves at altitudes exceeding 2,000 meters.

According to the researchers, the species inhabits underwater gravel and crushed stone at depths of less than one meter, where cave water temperatures remain consistently near 20°C. While rapid water flow during the rainy season occasionally flushes a small number of snails out through the cave’s outlet, they are never found in nearby surface streams and stay strictly within two meters of the cave entrance. In the lab, the snails fed on diatoms growing on rock surfaces as well as artificially supplied fish food.

Urgent Call for Conservation

Erhaia dijiang new cave snail from China — *Erhaia* *dijiang*. Credit to He et al., 2026.

However, despite marking a significant advance for the study of subterranean aquatic life in East Asia, the research team warns that the survival status of this newly discovered species is “far from optimistic.”

During their initial field survey in August 2025, the population density of Erhaia dijiang was found to be extremely low. The team was only able to locate three live adult individuals and a single empty shell in the shallow underground waters, and no juvenile snails were observed.

The researchers are urgently calling for extensive surveys of Chinese caves to improve our understanding of these complex ecosystems, along with the rapid formulation of conservation measures to protect these vulnerable, endemic mollusks.

Original study:

He Y-M, Xiang H-Q, Yang J-M, Zheng H, Yang S-Z, Zhou Y-F, Zheng J (2026) A new eyeless species in Erhaiidae (Gastropoda, Truncatelloidea) from a cave in Yuxi City, Yunnan, China. Subterranean Biology 56: 127-136. https://doi.org/10.3897/subtbiol.56.188075

Hidden Freshwater Giants Could Become The World’s Next Climate Observatories

International research team identifies South America’s unique coastal lake system as a global hotspot for tracking environmental change

More than 100 shallow lakes stretching over 1,000 kilometers along the Atlantic coast of southern Brazil and Uruguay could become one of the world’s most important natural laboratories for understanding how climate change and human activities reshape freshwater ecosystems.

An international team of researchers reports that these largely overlooked subtropical lakes offer an unparalleled opportunity to monitor biodiversity, water quality, pollution, and ecosystem resilience in a rapidly changing world.

Published in One Ecosystem, the study is the first comprehensive assessment of the Southern American Coastal Shallow Subtropical Lakes, highlighting their global scientific importance and outlining a roadmap for long-term international monitoring.

The Tramandaí Lagoon estuary, located between the municipalities of Imbé (left side of the channel) and Tramandaí (right side of the channel) in Rio Grande do Sul, Brazil, connects a complex of more than 40 coastal lakes to the Atlantic Ocean. Credit: CECLIMAR Collection (Photo credit: Acervo CECLIMAR).

“Most of what we know about lakes comes from the Northern Hemisphere,” says lead author Mariana Kluge of the Swedish University of Agricultural Sciences (SLU).

These subtropical lakes fill a major gap in global freshwater research. They allow us to test ecological theories under very different environmental conditions while providing crucial insights into how subtropical freshwater ecosystems respond to climate change and increasing human pressures.
adds Prof. Renata Medina-Silva of Pontifical Catholic University of Rio Grande do Sul (PUCRS)

The lake network forms one of the largest continuous coastal shallow-lake systems on Earth. Despite its extraordinary size and diversity, it has received far less scientific attention than well-known freshwater systems elsewhere in the world. Yet the region is already experiencing many of the environmental challenges, expected to intensify in the coming decades – including a direct impact of the El Niño Southern Oscillation – alongside heavy urbanisation, which has driven eutrophication, agricultural and wastewater pollution, emerging contaminants such as pharmaceuticals and microplastics, and increasingly frequent extreme rainfall and flooding events.

Coastal lakes from South America — Overview of the environmental heterogeneity found across South America’s unique coastal lake systems. Credit: Kluge et al., 2026.

Christian Wurzbacher of the Technical University of Munich argues that these lakes can serve as “sentinel ecosystems“- natural observatories that reveal early signs of environmental change. By combining microbial ecology, environmental DNA, remote sensing, water chemistry, and long-term ecological monitoring, scientists hope to develop new indicators capable of detecting ecosystem stress before irreversible damage occurs.

Our vision is to establish an internationally coordinated monitoring network that not only benefits South America, but also improves our understanding of freshwater ecosystems worldwide. The microbial communities living in these lakes can act as highly sensitive biological sensors, helping us identify pollution, ecosystem degradation, and even emerging public health risks.
says Prof. Haig of the Federal University of Rio Grande do Sul (UFRGS).

lakes in South America — Despite their high ecological value, these lakes are under increasing pressure from eutrophication, urban growth, and competing human uses such as water supply, irrigation, navigation, fishing, recreation, and sewage disposal. Credit: Kluge et al., 2026.

The publication emerged from an international workshop held at two universities – PUCRS and UFRGS – in Porto Alegre, Southern Brazil, bringing together researchers from Brazil, Uruguay, Germany, and Sweden to define future research priorities. The team identified four representative large-scale lake regions that together capture the broad environmental gradients across the system and offer ideal sites for coordinated long-term observation.

As climate change accelerates and pressures on freshwater resources continue to grow, the researchers believe that protecting and studying these remarkable lake systems will generate knowledge extending far beyond South America – informing global strategies for safeguarding biodiversity, improving water management, and strengthening resilience to environmental change.

Original source:

Kluge M, Shubeita A, Uchaikina A, Alonso C, Herrman B, Menegotto-Silva C, Lopes C, Pagani D, Marques D, Moreira-Silva E, Kristiansson E, Quintana I, Cavalcanti J, Fleck J, Ribeiro K, Varghaei L, Oliveira L, Rodrigues LR, Ramilo L, Crossetti L, Stockenreiter M, Cabezudo M, Lima M, Gonçalves NP, Mazzeo N, Schneider R, Utz LP, Bertilsson S, Wurzbacher C, They NH, Medina-Silva R (2026) Coastal subtropical Southern American shallow lakes as unique ecosystems for monitoring anthropogenic induced ecosystem changes. One Ecosystem 11: e186107. https://doi.org/10.3897/oneeco.11.e186107