Thousands of years ago, according to Greek myth, the nymph Cyllena nurtured the infant Hermes, messenger of the gods and famously the swiftest of the twelve Olympians, on Mt. Kyllini in southern Greece.
Now, in that same mountain, researchers from the National and Kapodistrian University of Athens have identified a completely new genus and species of subterranean freshwater snail living in a single isolated spring on its slopes. In a fitting nod to the area’s mythology, and perhaps a bit of irony, given the messenger god’s legendary speed, they named it Cyllena hermes.
The full details of the discovery have been published as a research article in Subterranean Biology, a peer-reviewed open-access journal published by the International Society for Subterranean Biology.
Live specimens of Cyllenahermes gen. et sp. nov. A–F live mature specimen, shown from the moment of emergence from the shell to active locomotion while foraging G–I another mature specimen; White arrows indicate the direction of movement J immature specimen floating at the water surface while feeding K caddisfly case (Insecta, Trichoptera) constructed from gastropod shells, including shells of Cyllenahermes gen. et sp. nov. Scale bars: 1 mm. Credit to Radea et al., 2026
So far, the snail is known from just one place on Earth: a karstic spring roughly 610 meters up the mountain’s foothills, in the Korinthia region of the Peloponnese. There, groundwater seeps out of carbonate bedrock and forms a small stream that feeds toward Lake Stymphalia, part of the sprawling underground hydrological network beneath the Stymphalia closed karst basin.
Type locality of Cyllenahermes gen. et sp. nov., Korinthia, Peloponnese, Greece. Karstic spring waters emerging from Mt Kyllini and forming a stream flowing toward Lake Stymphalia. Credit to Radea et al., 2026
Because the snail relies entirely on this single, isolated water source, it is highly sensitive to environmental stressors such as prolonged droughts and water extraction for surrounding neighboring areas, leading the research team to classify the species as Vulnerable under the IUCN Red List criteria.
When establishing this new monotypic genus and species, the researchers chose a name steeped in ancient Greek mythology tied to the mountain itself. The genus honours Cyllena, the nymph who raised Hermes there, while the species name pays tribute to Hermes himself, who legend says was born in a cave on that same mountain, where the new snail species was found.
Cyllenahermes gen. et sp. nov. Views from a single immature specimen. A dorsal view B ventral view C, D lateral view E–G scanning electron micrographs of shell and protoconch respectively. Scale bars: 1 mm (A–E); 100 μm (F); 50 μm (G). Credit to Radea et al., 2026
This significant finding highlights the rich, yet often undocumented biodiversity dwelling within Greece’s extensive underground karst ecosystems, while also bringing attention to the fragile nature of these highly localized environments.
Original source: Radea C, Protopapas D, Parmakelis A, Koskeridou E (2026) From the dark to the light: A new genus and species of stygobiont hydrobiid (Caenogastropoda, Truncatelloidea) from southern Greece. Subterranean Biology 57: 1-21. https://doi.org/10.3897/subtbiol.57.189090
What do brain morphology and sensory structures tell us about the evolutionary adaptations between catfish that live on the surface and those that live in caves?
Cave fauna fascinates young and old alike. Deep within the karst systems of Chapada Diamantina, Brazil, lives one of the world’s most diverse groups of cave-dwelling fish.
In fact, Brazilian cavefishes are the richest troglobitic (cave-dwelling) ichthyofauna worldwide, boasting 13 different genera. While the surface world is teeming with life, the subterranean realm, or the hypogean habitat, demands a very specific set of skills to survive.
The research, conducted by Thalia Rodovanski (from the Departamento de Biologia, Universidade Federal de São Carlos, Brazil) and her team, was published in Subterranean Biologyand took a closer look at the Copionodontinae, a subfamily of primitive catfishes.
Shallow water pool in Igatu. Photo credit to Maria Elina Bichuette.
Building on previous findings regarding the aggressive (agonistic) nature of Copionodontinae species, the researchers used this behavioral foundation to investigate how their physical and sensory structures have evolved in response to their environment.
By comparing surface-dwelling (epigean) species such as Copionodon pecten, C. lianae, and G. rodriguesi with their cave-bound cousin, Glaphyropoma spinosum, the researchers undertook the task of uncovering how these fish transitioned from the sunlit rivers to the pitch-black cave riverine systems.
Specifically, they did this by measuring the brain morphology and sensory structures such as barbels, eyes and counted pores of the lateral canal system on the head.
Shallow water pools in Igatu. Photo credit to Maria Elina Bichuette.
Researcher in a cave system in Igatu. Photo credit to Maria Elina Bichuette.
The curious findings
One of the most striking finds involved the genus Glaphyropoma. While the cave-dwelling G. spinosum shows classic troglomorphisms (adaptations for life in constant darkness), such as reduced eyes and a loss of skin pigment, the researchers found something surprising: even the surface-dwelling species in this group showed eye asymmetry and reduction.
Copionodon pecten. Photo credit to Maria Elina Bichuette.
Based on this, the researchers hypothesized that the asymmetry in the eyes is a plesiomorphic character (an ancestral trait) of the genus, rather than a feature developed in response to the specific habitat of each species. This pre-existing condition likely favored the colonization of hypogean (underground) habitats by G. spinosum.
In other words, Glaphyropoma already had a tendency toward reduced eyes. Instead of evolving small eyes because of the cave environment, they likely had them from the start. This is known as exaptation: a trait that originally evolved for one function (or no function at all) and was later co-opted for a new, different purpose, in this case, better suited for the dark.
Glaphyropoma spinosum. Photo credit to Adriano Gambarini.
As you can imagine, seeing in pitch black is quite hard. Therefore, these species had to rely on their other senses. The study found that the cave-dwelling G. spinosum has a longer telencephalon than its relatives. This is significant because it is the part of the brain responsible for navigating through chemical cues, creating mental maps (spatial memory), and participating in social interactions. Interestingly, the mesencephalon (the vision-processing center) hasn’t shrunk significantly yet, suggesting that these fish are still in the middle of their evolutionary transition.
The researchers concluded that while G. spinosum shows clear cave-specialized traits, many of these features are shared by its surface-dwelling cousins.
However, because of a lack of specimens of G. rodriguesi, the only known epigean species of the genus, which occurs sporadically in caves, it is not yet possible to definitively conclude if the sensory troglomorphisms detected in this study are related to taxonomic identity or the habitat itself.
Ultimately, such research is key to understanding more about the complex life of the highly specialized species that inhabit these fascinating environments.
Original source:
Rodovanski T, Bichuette ME, Cetra M, Mattox GMT (2026) The influence of subterranean habitats in the sensorial and brain morphology of hypogean and epigean Copionodontinae catfish (Siluriformes, Trichomycteridae). Subterranean Biology 55: 27-42. https://doi.org/10.3897/subtbiol.55.175751
Beneath the lush rainforests of the Yucatan Peninsula lies a hidden, subterranean world: a vast network of flooded sinkholes and anchialine caves. These unique underwater systems, which mix fresh and saltwater and are influenced by the tides, have no open connection to the surface and have served as an evolutionary refuge for millions of years.
When marine biologist Fernando Álvarez first encountered these sinkholes (cenotes), he was captivated.
My first impression of these incredibly beautiful places was that I had to work there to find out how that rich crustacean fauna had evolved in those exceptionally large cave systems.
Álvarez recalls
Entrance to a cenote. Photo credit to Fernando Álvarez.
Entrance to a cenote. Photo credit to Fernando Álvarez.
The cenotes where Typhlatya shrimps occur. Photo credit to Fernando Álvarez.
A recent study published in Subterranean Biology, reveals that the answer lies with a tiny, fascinating creature: the anchialine cave shrimp of the genus Typhlatya.
The Keystone of the Cave Food Web
The cenotes where Typhlatya shrimps occur. Photo credit to Fernando Álvarez.
In most surface ecosystems, sunlight fuels plants, which then feed the rest of the food chain. In the pitch-black depths of anchialine caves, nature has found other ways. Instead of photosynthesis, this ecosystem relies on a chemosynthetic route.
Organic matter from the rainforest floor decomposes and percolates through the porous limestone rock, eventually bringing methane into the cave’s waters. Methanotrophic bacteria consume this methane to produce energy and grow. And this is where Typhlatya shrimp comes in. Equipped with specialized, scraping appendages, these shrimps are adapted to graze on these bacterial mats.
Because they convert microbial growth into animal biomass, Typhlatya shrimps act as “keystone species,” introducing essential nutrients into the cave’s food web. They serve as a crucial initial link that larger subterranean predators feed on.
What we see now is that Typhlatya shrimps are a key component of the anchialine trophic web.
explains Álvarez
Stable Isotopes reveal ecological niches
To better understand how these shrimps survive, Brenda Durán and Fernando Álvarez used stable isotope analysis (looking at carbon and nitrogen signatures in the shrimps’ tissue) to figure out exactly what they are eating.
Typhlatya mitchelli. Photo credit to Fernando Álvarez.
Typhlatya mitchelli. Photo credit to Fernando Álvarez.
Over the years my research has evolved from very descriptive taxonomic studies… to more ecological studies about the interactions among species.
Álvarez notes regarding the motivation behind the study.
Their findings revealed that the different species of Typhlatya living in the Yucatan have carved out their own unique dietary niches, allowing them to peacefully coexist.
For instance, Typhlatya mitchelli relies mostly on decaying vegetation and nitrifying bacteria found in shallower cave sections. While, Typhlatya dzilamensis hangs out deeper in the caves near the halocline (the zone where fresh and saltwater mix), exploiting organic material trapped in that layer. Typhlatya pearsei feeds heavily on the methanotrophic bacterial biomass near the cave ceilings.
Beneath the lush rainforests of the Yucatan Peninsula lies a hidden, subterranean world: “My first impression of these incredibly beautiful places was that I had to work there to find out how that rich crustacean fauna had evolved in those exceptionally large cave systems.” – Marine biologist Fernando Álvarez. 👇 A reminder to check out our blog here for further insights: https://blog.pensoft.net/?p=18058 👇 Full article in the open-access journal Subterranean Biology: https://doi.org/10.3897/subtbiol.55.164068 #shrimp#yucatan#sciencenews#subterranean#ecology
Interestingly, the study found that the shrimps’ diets remain stable across the rainy and dry seasons. However, their diets do shift based on regional geography, such as the difference between the deep, isolated sinkholes of the “Ring of Cenotes” and the sprawling, highly interconnected tunnels of the “Caribbean Cave Area”.
A Fragile World Under Threat
The cenotes where Typhlatya shrimps occur. Photo credit to Fernando Álvarez.
These remarkable cave shrimps belong to an ancient lineage that has survived since the time of the dinosaurs, with relatives spanning the globe from the Mediterranean to Australia. Yet, they are now facing a modern, unprecedented threat.
The rapid urbanization of the Yucatan Peninsula brings deforestation, pollution, and severe environmental deterioration. Because these caves rely entirely on the organic matter percolating from the rainforest above, any damage to the surface environment directly destroys the “vertical integrity” necessary for the caves to function. As Álvarez warns:
We are losing the vertical integrity that these anchialine caves need to function; any changes occurring on the surface within the caves’ area will inevitably affect them.
The anchialine caves of the Yucatan Peninsula are complex, unique ecosystems filled with extraordinary biodiversity. To save the remarkable Typhlatya shrimp and the hidden food web it supports, we must protect the forests above ground.
Blind eel in an anchialine cave. Video credit to Fernando Álvarez.
The Yucatan Peninsula is an area of extraordinary cultural wealth and contains sophisticated and unique ecosystems as the anchialine caves, but sadly all this is disappearing.
he reflects
After all, the survival of this dark, subterranean world depends entirely on the health of the sunlit world above.
Original study
Durán B, Álvarez F (2026) The trophic role of cave shrimps of the genus Typhlatya seen through stable isotope eyes. Subterranean Biology 55: 43-56. https://doi.org/10.3897/subtbiol.55.164068
Guest blog post by Veronica Nanni, Jagoba Malumbres-Olarte, and Stefano Mammola
In an era where information is more accessible than ever, one might assume that communicating science has never been easier. However, science communicators often find themselves in a constant battle against public skepticism and media sensationalism. Scientific research is, by nature, intricate and nuanced, making it inherently challenging to communicate effectively. Academic papers are often laden with equations, technical jargon, and acronyms that, while ensuring precision and accuracy, may alienate even the most intrepid readers. The challenge, then, lies in translating complex findings into digestible and engaging narratives without oversimplifying or distorting the truth. Striking this balance is crucial, as misrepresentation can lead to misunderstanding, erode public trust, or even fuel misinformation.
As scientists working with subterranean biodiversity, we face an additional layer of challenges in science communication. Unlike more familiar ecosystems, such as forests or oceans, caves and other subterranean environments are foreign and unseen to most audiences. These hidden worlds are often perceived as mysterious, inhospitable, or even irrelevant to everyday life. This lack of direct experience or knowledge creates a significant barrier to interest and engagement. For instance, the delicate balance of subterranean ecosystems and their hidden interconnection with surface ecosystems is not only difficult to visualize but also challenging to relate to broader environmental issues that resonate with the public, such as climate change or biodiversity loss.
Werner’s leaf-toed gecko (Asaccus elisae), picture from https://doi.org/10.3897/subtbiol.18.8185
Furthermore, subterranean organisms, such as blind fish, pale invertebrates, and microbial communities, often lack the visual appeal of iconic surface species (e.g., lions, dolphins, polar bears), making it difficult to generate interest or concern. Such scarce interest often means that subterranean ecosystems are scarcely represented in global biodiversity agendas, leaving most of them unprotected or poorly regulated.
This communication challenge and policy gap became even more apparent at the start of the Biodiversa+ project DarCo, a transnational project involving 13 research institutes across Europe. The project aims to advance knowledge about subterranean biodiversity in Europe and advance its conservation. DarCo’s overarching goal is to develop a concrete plan to incorporate subterranean ecosystems into the European Union (EU) Biodiversity Strategy for 2030.
For the successful implementation of the project, there is a need to engage with diverse audiences, from the general public to stakeholders who rely on subterranean resources in various ways—e.g., speleological groups, water managers, national park authorities, and even politicians involved in EU-level legislation on nature conservation. This is where the challenge of communicating the importance of subterranean biodiversity to the health of ecological systems and the well-being of society became quite apparent. We realized that tapping into non-scientific forms of communication might offer a promising way forward.
Figure 1. Life in the darkness of caves through an illustration targeting kids. Modified from https://doi.org/10.3389/frym.2022.657265 (original illustration by Irene Frigo).
We began collaborating with various artists and scientific illustrators to aid in our communication efforts. Whether illustrating cave life and its conservation for children (Figure 1) or involving illustrators to create compelling visuals for our scientific publications (Figure 2), the science-art collaboration proved particularly effective. We even invited a scientific illustrator, Dr. Jagoba Malumbres-Olarte, to the 26th International Conference on Subterranean Biology (Cagliari, Italy, 9–14 September 2024), where the DarCo team organized a workshop on subterranean conservation open to both scientists and stakeholders. Jagoba’s role was to create an artistic representation of the workshop flow (Figure 3) and illustrate key aspects of selected scientific talks.
Figure 2. Scientific illustration for a scientific publication on climate change’s impact on subterranean ecosystems. Modified from https://doi.org/10.1016/j.oneear.2023.09.001 (original illustration by Jagoba Malumbres-Olarte).
Stemming from these fruitful collaborations, we decided to write a scientific paper on the role art can play in the conservation of subterranean ecosystems, highlighting the benefits for subterranean scientists engaging with artists and vice versa. Although there is no quantitative proof yet that art directly promotes subterranean conservation, our experience as scientists who frequently collaborate with artists—and artists who often collaborate with scientists—suggests that bridging these worlds can have profound, lasting impacts on scientific communication and conservation efforts. By engaging with artists, subterranean scientists can create more impactful visuals for research papers and presentations, enhance public engagement through powerful storytelling, and spark fresh insights that may drive new research directions.
To maximize these benefits, scientists should foster collaborations by inviting artists to conferences and workshops, involving them in cave expeditions, and even dedicating small portions of research budgets to artistic initiatives. On the other hand, artists can undertake projects focused on conservation and related scientific fields, using their own platforms and tapping into funding sources beyond traditional scientific grants.
Figure 3. Infographic created through the graphic facilitation of DarCo’s workshop held during the 26th International Conference on Subterranean Biology (Cagliari, Italy, 9–14 September 2024). Original illustration by Jagoba Malumbres-Olarte.
Art has long been a bridge between knowledge and emotion, making complex ideas accessible through storytelling, visuals, and performance. Scientific illustrations, data visualizations, and interactive exhibits can transform abstract information into tangible experiences. Moreover, films, theater, and literature can create emotional connections with audiences, helping them grasp the real-world implications of scientific discoveries.
By integrating art with science communication, we can reach people who might otherwise feel disconnected from scientific discourse. Art and science are not opposing forces but complementary ones, enriching each other in profound ways. As we face global challenges such as climate change, biodiversity loss, and public health crises, integrating artistic expression with scientific inquiry can foster deeper understanding, empathy, and action, spreading knowledge and awareness of these threats in society.
Research article:
Mammola S, Malumbres-Olarte J, Vaccarelli I, Nanni V, Bellvert A, Jarić I (2025) On art, science, and the conservation of subterranean ecosystems. Subterranean Biology 51: 1-19. https://doi.org/10.3897/subtbiol.51.139954
Beneath the arid pre-Saharan zone of Morocco lies Aziza Cave, also known as Kef Aziza or Tazouguert Cave. The vast subterranean system stretches over 3.5 kilometers of surveyed galleries, making it Morocco’s fifth-largest cave system and one of the top ten most extensive caves in North Africa.
A view of the Sahara desert and Aziza cave’s entrance.
Beyond its sheer size and geological significance, Aziza Cave harbors a rich and diverse array of subterranean life that is only now beginning to be revealed widely. In a recent study in the journal Subterranean Biology, researchers cataloged the subterranean fauna of Aziza Cave and provided a detailed checklist of 26 different taxa potentially representing cave-restricted species. Among these are 22 troglobitic species, organisms that have adapted to life entirely within the cave environment, and four stygobitic species, which have specially evolved to live in the cave’s groundwater.
Four of the authors of the paper.
The discovery of such a variety of species highlights the cave as a critical biodiversity hotspot, not only in Morocco but for the African continent as a whole. One alarming aspect of this discovery is the large number of species that still need to be thoroughly studied or described.
Dysdera caeca, a cave spider
Only about 34.6% of the species in Aziza Cave have been formally identified and described by scientists. Further research could lead to the identification and description of many new species. The fauna found in Aziza Cave includes a wide variety of life forms, with the richest groups being beetles (Coleoptera), spiders (Araneae), springtails (Entomobryomorpha), and woodlice (Isopoda). Some have evolved remarkable adaptations to their lightless, nutrient-scarce environment, such as reduced pigmentation, elongated appendages, and heightened sensory capabilities that help them navigate and survive in this extreme habitat.
Long-tailed bat Rhinopoma hardwickei.
Despite these discoveries, much of Aziza Cave remains unexplored. Large portions of this karstic system have yet to be surveyed, and researchers believe that the biodiversity uncovered so far is just the beginning. The cave’s unexplored depths likely hold many more secrets, including potentially new species that have yet to be seen by human eyes. This prospect has sparked great interest among speleologists and conservationists, who see Aziza Cave as an important research site for studying subterranean ecosystems.
Magnezia gardei, a cave isopod.
The biodiversity of Aziza Cave is something to celebrate, but it also sheds light on the significant conservation challenges that subterranean habitats in Morocco and across North Africa are facing. Caves are delicate ecosystems that are highly sensitive to changes in their environment. Human activities such as pollution, mining, deforestation, and unsustainable tourism pose severe threats to these ecosystems and the species that depend on them. Once these habitats are damaged or destroyed, it is often impossible to restore them, and the species that inhabit them may face extinction.
Graffiti on the cave walls.
Human-induced impacts have already begun to take their toll in Aziza Cave. Visitors can disrupt the delicate balance of the cave’s ecosystem, change water quality, or introduce pollutants and alien species. These pressures underscore the urgent need for conservation measures to protect this unique environment and its inhabitants. By highlighting the importance of Aziza Cave and similar habitats, the researchers hope to encourage further exploration and study of Africa’s subterranean ecosystems and develop effective conservation strategies to protect them. By protecting these fragile ecosystems and supporting scientific exploration, we can ensure that the incredible biodiversity of Aziza Cave and other subterranean habitats continues to thrive.
Research article:
Moutaouakil S, Souza-Silva M, Oliveira LF, Ghamizi M, Ferreira RL (2024) A cave with remarkably high subterranean diversity in Africa and its significance for biodiversity conservation. Subterranean Biology 50: 1-28. https://doi.org/10.3897/subtbiol.50.113919
Guest blog post by Petra Lukeneder and Adrienne Jochum
During the past years, interest in the processing and preservation of historical, scientific collections has increased significantly. Fascinating and obscure treasures are stored along with their individual stories while splendid and exciting specimens eke out an existence in boxes and cellars. The scientific curation of the Dominik Bilimek (1813-1884) Collection at BOKU University (Vienna, Austria) is one such example. Stored in the attic for many decades, later stashed in the basement, surviving two floods, a plethora of untold narratives unfolded as the specimens were unpacked. For example, the story of the young, aspiring, Slovenian collector and researcher, Heinrich Hauffen (1836-1866), with his special interests in speleology and the fauna inhabiting the subterranean realm come to light.
The only known photograph of collector and naturalist Heinrich Hauffen (1836-1866) (Digital Library of Slovenia; reference number 5S74D58Z).
At first, it was just a label type in the collection that differed from the others. It was a multidisciplinary process to assign it to Hauffen. At that time, only few scientists were concerned with the genus Carychium, including Georg von Frauenfeld (1807-1873), Heinrich Freyer (1802-1866), and Meinrad Thaurer von Gallenstein (1811-1872), all of whom were names that were closely linked to Bilimek and his collection. Fortunately, Hauffen’s handwriting could be identified by using original manuscripts from the Archive of the National Museum of Slovenia.
In our work published in Subterranean Biology, we present our results on the rediscovery of historical material of Heinrich Hauffen, which turned out to be original material, that he used to describe the cave snail taxa Carychium reticulatum and Carychium reticulatum bidentatum. Today, the eastern Alpine and the Dinaric subterranean members of the genus Carychium are assigned to their own genus, Zospeum, based on their troglobiontic characteristics such as lack of eyes, colourless bodies, genetic data, and their totally different shell morphology.
Live animal, indicated by the yellow arrow, of the genus Zospeum from Krska jama cave in Slovenia. The snail’s shell appears almost to be translucent.
This interdisciplinary work not only includes historical aspects, but also a collaboration with the Natural History Museum Vienna and the Department of Evolutionary Biology (University of Vienna) in conjunction with the taxonomic expertise from the Natural History Museum Bern (Bern, Switzerland), the Senckenberg Research Institute and Natural History Museum (Frankfurt am Main, Germany) and from the Zoologische Staatssammlung München (Münich, Germany). By using light microscopy, X-ray Micro-CT data and SEM in sync with Hauffen’s original figures and handwritten documents, the morphological analysis of C. reticulatum illustrates the degree of phenotypic variation on the shells of individuals from two different cave populations of the species Zospeum spelaeum. The species Carychium bidentatum is considered a junior synonym of Zospeum costatum.
Cave snail collection during field work in Slovenia and Spain.
The genus Zospeum constitutes a radiation of minute, glassy troglobitic snails (Ellobioidea) endemic to the Eastern Alps and the Dinaric Alps, extending as far west as Lake Garda in Italy and as far south as Montenegro. So far, 38 species of Zospeum have been described. Morphologically, the most informative diagnostic characters are apertural form and the degree of coiling and the shape of the columella (inner spindle) as well as the presence and configuration of the lamella in relation to it. In the Pre-Micro-CT era, one had to poke windows into the shells to view these signatory structures. Valuable material could become damaged, and many taxonomists shied from risky mishaps to assess the tiny shells (< 1.5 mm). This present work demonstrates the efficacy of fine-resolution imagery to assess valuable historic material.
Archive of the Institute of Applied Geology (BOKU University), where the Bilimek Collection including Hauffen’s material, is being stored and processed. Photo by Radek Polách, Muzea Novojičínska.
Hauffen died at the age of 30 as part of the Austrian volunteer corps in Mexico – with the prospect of a permanent position at the Mexican National Museum. According to current knowledge, this is the reason why the Hauffen collection was passed on to Bilimek, who returned to Europe in 1867. There are still abundant specimens, often from localities that cannot longer be sampled nowadays, from Hauffen within the Bilimek collection. In the future, this part can hopefully be separated and scientifically processed as well.
Research article:
Lukeneder P, Ottner F, Harzhauser M, Winkler V, Metscher B, Ruthensteiner B, Jochum A (2024) Lost & Found – Rediscovery of H. Hauffen’s Carychium material in the Dominik Bilimek Collection, BOKU University, including a contemporary assessment within the genus Zospeum (Gastropoda, Ellobioidea, Carychiinae). Subterranean Biology 49: 97-116. https://doi.org/10.3897/subtbiol.49.130692
In busy Los Angeles, few people pay attention to what’s under their feet, but a new underground movement has people looking at the subterranean world just below the surface. A team of scientists discovered a new species of millipede crawling just beneath the soil surface in Los Angeles and Orange counties.
These never-before-seen creatures are pale, blind, thin, inch-long burrowers with the ability to produce a silk-like sticky substance, similar to spider silk. Measuring in at 0.5 millimeters wide and 2 1/2 centimeters long, these creatures are about the width of the a thin graphite lead of a mechanical pencil and about as long as a small paperclip.
The Los Angeles Thread Millipede’s size compared with a nickel. Photo by Paul Marek for Virginia Tech
Despite being so small, they are described as having a gaping toothy mouth and over 480 legs. The species in question is called the Los Angeles Thread Millipede, formally named Illacme socal.
This minute critter, the Los Angeles Thread Millipede has gone unnoticed beneath feet until now. Photo by Paul Marek for Virginia Tech
“We hope that this discovery will encourage conservation efforts to protect these unique creatures and their habitats,” said Marek. “The discovery of Illacme socal highlights the importance of research into subterranean fauna.”
The discovery of Illacme socal was made possible by funding from the National Science Foundation. The research team included scientists from Virginia Tech, West Virginia University, and the University of California, Berkeley. The findings were published in the journal ZooKeys.
The team captured a video of the millipede burrowing and moving through small spaces and crevices underground. This is the first-ever video of this species in action and provides insight into the unique behaviors of these fascinating creatures.
This research discovery highlights the importance of habitat preservation efforts to protect the environment and prevent the loss of biodiversity. The millipede was found in two parks in the Los Angeles and Orange counties but almost certainly lived in other parts of the metropolis in the past.
The fact that populations of this species is living in two small well-known areas that are near constant development emphasizes the need for conservation efforts to protect this and other threatened organisms.
Research article:
Marek PE, Hall CL, Lee C, Bailey J, Berger MC, Kasson MT, Shear W (2023) A new species of Illacme from southern California (Siphonophorida, Siphonorhinidae). ZooKeys 1167: 265-291. https://doi.org/10.3897/zookeys.1167.102537
Press release originally published by Virginia Tech. Republished with permission.
Throughout history, people have used caves for a number of reasons: as shelters, places for rituals, food storage, and, in more recent times, as touristic attractions. In these so-called show caves, visitors can experience the natural beauty of caves, usually by following a guide on constructed, artificially lit trails.
But caves are also very fragile ecosystems, bursting with underground life. They are home to numerous invertebrate and bat species, including ones that are threatened or endemic. The human disturbances caused by the changes in the infrastructure and environment, coupled with the influx of tourists, often affect the ecological processes and, consequently, these organisms. But how much do we know about the influence of tourists on cave ecosystems?
Apart from affecting subterranean invertebrates, the artificial lighting and noise related to tourist visits may also affect the life of bats, making it harder for them to reproduce or overwinter in caves.
Going through more than 1,000 scientific papers, an Italian team of scientists, led by Marco Isaia and Elena Piano from the University of Torino, prepared a literature-based dataset relative to the knowledge on the ecological status of 265 show caves in 39 countries across the world. Their database includes a georeferenced set of show caves, where researchers have evaluated a number of environmental indicators that help monitor the impact of tourism and its related activities on subterranean ecosystems. They also list cave characteristics for each cave, including its natural heritage that attracts tourists.
There are many ways in which tourism can disturb life in a cave. For example, the presence of visitors may help increase cave temperature, which, combined with the increase of CO2 air concentration caused by tourists’ breath, may enhance carbonate dissolution, damaging geological formations. Moreover, tourists can carry pollutants and propagules of microorganisms into the cave through their clothes and hands, which then land on geological formations, in the water, in the air, and on the ground. Apart from affecting subterranean invertebrates, the artificial lighting and noise related to tourist visits may also affect the life of bats, making it harder for them to reproduce or overwinter in caves.
The dataset published in Nature Conservation set a baseline towards the integrated and multidisciplinary study of the impacts caused by tourism on these fragile ecosystems, but the research team points out that much remains to be done. For example, they found out that there wasn’t enough research on show caves outside of Europe, or on the possible impacts of tourism on the subterranean fauna in the context of climate change.
Ultimately, the data in this study can help managing authorities come up with guidelines that will allow a sustainable touristic development of show caves, not only from an environmental perspective, but also from an economic and social point of view.
“Overall, this data paper could fill the lack of awareness towards the fragility of the natural heritage of show caves to favour a sustainable touristic use that would guarantee their preservation for future generations as well as the economic development of local communities”, the authors conclude.
Research article:
Piano E, Nicolosi G, Mammola S, Balestra V, Baroni B, Bellopede R, Cumino E, Muzzulini N, Piquet A, Isaia M (2022) A literature-based database of the natural heritage, the ecological status and tourism-related impacts in show caves worldwide. Nature Conservation 50: 159-174.https://doi.org/10.3897/natureconservation.50.80505
All images are from Bossea show cave in Italy, by Simone Marzocchi.
The recognition of the “Ceguaca, la Mujer de los Juncos” locality comes as a result of research work – published last year in Subterranean Biology – which produced the first checklist of bats for Santa Bárbara
Guest blog post by Eduardo Javier Ordoñez-Trejo and Manfredo Alejandro Turcios-Casco
Bat populations are threatened due to fragmentation and loss of their habitats. Meanwhile, dry forests are some of the least studied and most threatened ecosystems in Honduras, and similarly, so have been the caves.
We had to walk at least two hours to reach either of the caves in El Peñon or Quita Sueño, so we would take our full equipment: for camping, cooking and studying bats. Photo by Hefer Ávila
Caves are important reservoirs of species, as they offer perks no other habitat can provide at once: a refuge from predators, inconstant weather, and a critical venue for social interactions, reproduction, hibernation, roosting and nutrients. In order to protect bat populations, the Latin American and Caribbean Web for Bat Conservation (RELCOM) supports the establishment of Areas of Importance for the Conservation of Bats, abbreviated as AICOMS (Spanish for Areas with Importance for the Conservation of Bats) .
It was at least a two-hour walk between the caves of Monte Grueso and the caves of El Peñon. The final stint, though, included a swim across Rio Ulúa, one of most extensive rivers in Honduras. Photo by Hefer Ávila
Together with biologists of the National Autonomous University of Honduras (UNAH) and local community members, we provided the first ever checklist of bat species in the Dry Forest of Ceguaca, Santa Barbara (Honduras), and described the importance of two caves in the area for bat conservation based on species richness. We published this study last June in Subterranean Biology.
The study is openly accessible in Subterranean Biology
We found that caves in Ceguaca are inhabited by at least 23 bat species of four families, which represents approximately a fifth of all species known from Honduras. Their inhabitants include several threatened species like the hairy-legged vampire bat (Diphylla ecaudata), one of the three existing vampire bats, and rare species with few official records in the area, such as Schmidts’s big-eared bat (Micronycteris schmidtorum). These caves may also represent a critical site for roosting and nursing. During our study, we managed to record pregnant and lactating females of several species, as well as reproductive males.
The certificate issued by RELCOM recognising the caves in Ceguaca as an Area of Importance for the Conservation of Bats, dated 6th March 2020
“It feels wonderful to see that our work has had great results and that with our efforts, we established an area where bats will be protected and studied. This certification also includes the name of Roberto Castellano, an elder member of the community of Ceguaca, who helped us during the fieldwork as our guide. He was a great conservationist of this area and protector of the caves. Unfortunately, he passed away during the study, however, due to his enormous contribution, we dedicated our article to him and included him as part of this AICOM success.”
José Alejandro Soler Orellana, co-author of the study.
Using what we learned in Ceguaca’s caves, we approached the Program for Bat Conservation of Honduras (PCMH) and showed them the evidence the locality was indeed a precious place with a spectacular bat diversity. Consequently, thanks to our collaboration with the PCMH, the site was effectively declared as an Area of Importance for the Conservation of Bats by RELCOM on 6th March 2020.
This is an enormous step for bat conservation in the country. Bat conservation efforts should focus on studying and protecting these and other important habitats. We also need to make sure that local people appreciate the important role the bats play in the ecosystem.
We captured this adult Pallas’s long-tongued bat (Glossophaga soricina) female in a cave in Monte Grueso. She must have been returning to the cave after spending the day pollinating local plants. During these surveys, we found trees with opened flowers of Mexican calabash (Crescentia alata). Photo by Hefer Ávila
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Research article:
Turcios-Casco MA, Mazier DIO, Orellana JAS, Ávila-Palma HD, Trejo EJO (2019) Two caves in western Honduras are important for bat conservation: first checklist of bats in Santa Bárbara. Subterranean Biology 30: 41–55. https://doi.org/10.3897/subtbiol.30.35420
Lead author Marc Milne in the Stygian River Cave and a male specimen of the newly described Islandiana lewisi
Spiders are ubiquitous within our forests, fields, and backyards. Although you may be used to seeing the beautiful yellow and black spiders of the genus Argiope in your garden, large ground-scurrying wolf spiders in your yard, or spindly cellar spiders in your basement, this new sheet-web-building spider is probably one you haven’t seen before. The reason is that it’s known from a single cave in the world, Stygeon River Cave, in southern Indiana.
Sheet weavers, also known as dwarf spiders or money spiders, are minute creatures growing no larger than a few centimetres in length, which makes them particularly elusive. Their peculiar webs are flat and sheet-like, hence their common English name.
Female of the new species Islandiana lewisi
The new spider, Islandiana lewisi, is an homage. Milne was shown the spider by a fellow scientist, Dr. Julian Lewis, who noticed the critter on one of his many cave expeditions. In appreciation for his help, Milne and Wells named the spider after Lewis.
This is the fifteenth species in its genus (Islandiana) and the fifth known to live exclusively in caves. It has been over 30 years since the last species has been added to this group.
At about 2 mm in size, Islandiana lewisi is thought to feed on even smaller arthropods, such as springtails living in the debris on the cave floor. It is unknown when it reproduces or if it exists anywhere else. The spider is likely harmless to humans.
The collectors of the spider, Milne and Lewis, described the hostile conditions within the cave, which the new species calls home: “because the cave floods from time to time, the insides were wet, muddy, slippery, and dangerous to walk on without the proper equipment.”
Milne and Lewis found the spider in small, horizontal webs between large, mud-caked boulders in the largest room in the cave. It was collected in October 2016 with the permission of the landowner.
Milne hypothesized that he had collected something special, stating, “I didn’t know what the spider was at first, I just thought it was odd that so many were living within this dark cave with no other spider species around.”
After returning to the lab and inspecting the spider under a microscope, Milne initially misidentified the species. However, when he re-examined it months later, he realized that the species was indeed new to science.
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Original source:
Milne MA, Wells E (2018) A new species of spider (Araneae, Linyphiidae, Islandiana) from a southern Indiana cave. Subterranean Biology 26: 19-26. https://doi.org/10.3897/subtbiol.26.25605
