Researchers at the University of Idaho have identified a new species of spider in the mountains of northern Idaho and given it a name that pays tribute to the university itself: Hexura vandal.
Researchers at the University of Idaho have identified a new species of spider in the mountains of northern Idaho and given it a name that pays tribute to the university itself: Hexura vandal.
The spider belongs to a small group of funnel-web spiders related to tarantulas. Until now, only two species in this genus were known, both living hundreds of miles away in the coastal forests and mountains of Oregon and Washington.
Finding a third species so far inland, in the Rocky Mountains near the town of Kooskia, came as a surprise to the research team, led by Arnau Calatayud-Mascarell, Ethan J. Briggs and Chris A. Hamilton. It extends the known range of the genus by roughly 500 kilometres and is the first new taxonomic work done on this group of spiders in almost fifty years.
Distribution and habitat of Hexura spiders including new records, records from iNaturalist, Gertsch and Platnick (1979), and The Burke Museum of Natural History in Seattle, Washington. Blue = H. picea, Pink = H. rothi, Yellow = H. vandal.
Associate Professor Dr. Chris A. Hamilton stated:
“It’s always exciting when you realize the samples you’ve been looking at are an undescribed new species. This is one of the main reasons we do this job – to document Earth’s incredible biodiversity and expand our foundational biological knowledge of our planet. It just makes it even more exciting when that undescribed diversity can be found in your backyard (figuratively speaking).”
The name is where the story becomes especially local. Rather than a Latin descriptor, the researchers chose “vandal”, which is a direct nod to the university’s own mascot. The nickname dates back to 1917, when student journalist Harry Lloyd McCarty described the men’s basketball team’s fierce style of play as “vandalizing” their opponents. The name stuck, and the University of Idaho remains the only Division I university in the United States with the Vandals as its mascot.
Hexura vandal sp. nov. female (L) and male (R). Credit: Arnau Calatayud-Mascarell et al., (2026).
When discussing how the name was picked, Hamilton said:
“It didn’t take very long for the lab to sit down and decide what to name the new species. It was basically, this is really unique because it’s only found in Idaho and it’s not very far (relative) from campus. It’s black (sorry that it’s not black and gold like the school colors!). It’s a predator that attacks. It’s a Vandal.”
The discovery comes with a note of caution. Hexura vandal has so far only been found in a handful of sites within a very small area of forest in Idaho, despite repeated searches nearby. The region faces pressure from logging, and wildfires, which are becoming more frequent, and tend to strike during the spiders’ breeding season. Taken together, these factors have led the researchers to consider the micro-endemic species likely endangered, and they hope the discovery will help build the case for protecting its habitat.
University of Idaho, home of the Vandals, is Idaho’s land-grant university and the state’s first Carnegie R1 research institution — a ranking reserved for the top 4% of U.S. universities. From its residential campus in Moscow, U of I serves the state through centers in Boise, Coeur d’Alene, Idaho Falls and McCall, nine research and Extension centers, and Extension offices in 42 counties. With more than 12,000 students, U of I is a leader in student-centered experiential learning, interdisciplinary research, business and community service and global outreach. The Vandals compete as a founding member of the Big Sky Conference and as an affiliate in the Big West and Mountain Pacific Sports Federation.
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Cover image:
Top: US Highway 12, near Hexura vandal sp. nov. type locality, Apgar Campgrounds, Lowell, Idaho.; Bottom: Mixed conifer forest logs, Hexura vandal sp. nov. type locality, Apgar Campgrounds, Lowell, Idaho
Original source:
Calatayud-Mascarell A, Briggs EJ, Hamilton CA (2026) Hidden in the woods: A new species of Hexura (Araneae, Mygalomorphae, Antrodiaetidae) from a highly restricted range in Idaho. ZooKeys 1290: 339–355. https://doi.org/10.3897/zookeys.1290.200898
The Pikelinia floydmuraria, a new addition to the South American Pikelinia population, was observed in Colombia’s department of Tolima and is now described in the journal Zoosystematics and Evolution.
A team of researchers from institutions across South America have expanded scholarly knowledge of the Pikelinia spider genus, with their recent discovery of a new crevice weaver species: Pikelinia floydmuraria.
The new species name is a creative tribute to the legendary rock band Pink Floyd, while simultaneously referencing the spider’s specific habitat. “Muraria,” derived from the Latin word for “wall”, reflects the species’ tendency to reside in the walls of buildings, though indeed also alludes to the iconic Pink Floyd album, The Wall.
A photo of the wall were these spiders live in Armenia, Quindío. Photo credit to Leonardo Delgado-Santa.
Pikelinia floydmuraria, male paratype. Credit to Leonardo Delgado-Santa.
These findings are described in greater detail in the open-access journal Zoosystematics and Evolution (ZSE) and serve as a particularly important contribution to the wider study of synanthropic spiders – species that have adapted to human-created environments. Despite the ecological importance of these spiders in Colombia, research into their biology and nutritional ecology has received little attention. The discovery of the Pikeliniafloydmuraria, alongside observations of additional populations in neighbouring Colombian departments, holds the potential to remedy this problem.
The species establishment
The first regional review of the genus Pikelinia was established in 1946 by the Brazilian zoologist Mello-Leitão. For decades, the genus remained obscure, with species often misidentified or “lumped” into the type genus Filistata, most commonly found in the Mediterranean region.
In 2022, however, a major study redefined Pikelinia as part of a distinct South American spider group. Pikelinia floydmuraria is the most recent addition to the genus and provides considerable insight into the dietary composition of these crevice weavers.
Skilled hunters
Pikelinia floydmuraria from Tolima, Female Juvenile, attacking a cockroach on the web. Credit: Julio C. González-Gómez.
Pikelinia floydmuraria from Tolima, Female Juvenile, attacking a cockroach on the web. Credit: Julio C. González-Gómez.
These spiders are skilled hunters, primarily feeding on insects including flies, beetles and ants. Remarkably, they are capable of taking down prey up to six times their own size and often build their webs near streetlights to catch insects attracted to the glow. The above figure provides a visual representation of the spider’s predatory behaviour in urban habitats, demonstrating its ability to prey on insects larger than itself.By keeping these insect populations under control, crevice weavers thus maintain a healthier balance in the Colombian urban environment.
The research team behind this discovery, led by Osvaldo Villarreal and Leonardo Delgado-Santa, note that Pikelinia floydmuraria only measure about 3 to 4 millimetres in length. One of their most unique internal features is found in the females, which contain reproductive organs comprising long and slender tubes that are shaped like the letter “S”. In urban environments, they can be found tucked in the cracks and crevices of building walls, with observed concentrations reaching between 20 and 30 spiders in a single square metre.
Pikelinia fasciata, female from Galapagos A. Habitus (dorsal view). Credit: Andrea C. Roman.
The researchers further observed that Pikelinia floydmuraria is a very close relative of another species called Pikelinia fasciata, which lives in the Galapagos Islands. Despite being separated by the Pacific Ocean and Andes mountain range, the two look almost exactly alike, leaving scientists to wonder: how did such similar spiders end up so far apart? It remains a mystery as to whether these traits reflect shared ancestry or similar ecological adaptations.
Nonetheless, the two can be differentiated by the appearance of their legs, with the Colombian spider displaying solid-colours, and the Galapagos featuring darker rings by contrast. The Galapagos female spiders additionally have shorter and straighter reproductive organs in comparison to the Colombian female.
🎸🕸️ Meet the latest rock star of the #spider world: Pikelinia floydmuraria. 🕷️Recently discovered in Colombia, this species was officially named after @Pink Floyd as a tribute to both their iconic album “The Wall” and the spider’s favourite hangout: urban city walls. ➡️ Follow the link to read more about this discovery: https://zse.pensoft.net/article/175423/ ➡️Or see the blog post here: https://blog.pensoft.net/2026/04/14/meet-the-crevice-weaver-a-newly-discovered-urban-spider-from-colombia/ #arachnid#spiders#newspecies#science
In order to better determine whether Pikelinia floydmuraria is a unique species native to Colombia, the South American researchers suggest the implementation of DNA barcoding in future studies. This will provide genetic evidence that could help map the evolutionary history of Pikelinia floydmuraria. A DNA-based dietary analysis, meanwhile, would quantify the extent to which these spiders operate as natural urban pest regulators.
Whether they are just “another web in the wall” or a relative from the Galapagos, the discovery of Pikelinia floydmuraria represents a significant advancement in our understanding of South American spider taxonomy. By identifying this new Colombian species and providing the first-ever detailed anatomical description for its relative, Pikelinia fasciata, researchers have expanded scientific knowledge of the Pikelinia genus.
Pikelinia floydmuraria may be small and “comfortably numb” to the bustle of the city, but their impact on maintaining a healthy urban ecosystem is anything but quiet.
Original source
Villarreal O, Delgado-Santa L, González-Gómez JC, Rodríguez-Castro GA, Román AC, Agudelo E, García LF (2026) Another web in the wall: A new Pikelinia Mello-Leitão, 1946 (Araneae, Filistatidae) from Colombia, with notes on its diet and description of the female genitalia of P. fasciata (Banks, 1902). Zoosystematics and Evolution 102(1): 357-366. https://doi.org/10.3897/zse.102.175423
Guest blog post by Ying Wang, Qingzhen Meng, Yuri M. Marusik and Zhiyuan Yao
Prof. Shuqiang Li
In a recent paper published in ZooKeys, a new genus of Lynx spider from China was named after the given name of ZooKeys subject editor Shuqiang Li, to honour him for his contributions in spider taxonomy. It is worth noting that from the publication of the first article on the taxonomy of Chinese spiders in 1842 by Cantor to the release of The Spiders of China by Song et al in 1999, the number of known Chinese spider species was only 2,361 through 175 years of cumulative research. In the past 25 years, spider research in China has been led by Shuqiang and his colleagues. To date, the number of Chinese spider species has exceeded 7,000, increased by 4,639 species in 25 years. These taxonomic research achievements are the result of the silent dedication of Shuqiang and his colleagues, and have laid a solid foundation for understanding and conserving China’s biodiversity.
Shuqiang is also a prolific arachnologist. By early 2025, he is author or coauthor for 2 063 new spider species, establishing him as the second most prolific arachnologist in history and one of the foremost taxonomists of the 21st century.
“I am delighted that the authors have named a spider genus after me. I hold the view that taxonomy should never be underestimated. Balanced disciplinary development is the foundation of healthy scholarship, and an overemphasis on high-profile disciplines is detrimental to social progress,” Shuqiang Li commented.
Research article:
Wang Y, Meng Q, Marusik YM, Yao Z (2025) Shuqiangius gen. nov., a new genus of Oxyopidae (Arachnida, Araneae) from China. ZooKeys 1261: 189-200. https://doi.org/10.3897/zookeys.1261.171511
The species was previously known on the commercial tarantula market as the “Chilobrachys sp. Electric Blue Tarantula” but no documentation existed describing its distinctive features or natural habitat.
In an exciting discovery, a new species of tarantula with electric blue coloration was found in Thailand.
New electric blue tarantula species discovered in Thailand. Photo by Yuranan Nanthaisong
“In 2022, the bamboo culm tarantula was discovered, marking the first known instance of a tarantula species living inside bamboo stalks. Thanks to this discovery, we were inspired to rejoin the team for a fantastic expedition, during which we encountered a captivating new species of electric blue tarantula” researcher Dr. Narin Chomphuphuang said.
Following the announcement of Taksinus bambus in Thailand, he and his research team, along with JoCho Sippawat, a local wildlife YouTuber, embarked on a survey expedition in the Phang-Nga province. During their survey, they not only identified this new tarantula species by its distinctive electric-blue coloration but also discovered its unique natural history. This is the first tarantula species ever found in a Thai mangrove forest.
The Chilobrachys natanicharum electric-blue tarantula exhibits a blue-violet hue resembling the color of electrical sparks. Photo by Yuranan Nanthaisong
“The first specimen we found was on a tree in the mangrove forest. Collecting them was challenging due to the muddy and waterlogged ground. These tarantulas inhabit hollow trees, and the difficulty of catching an electric-blue tarantula lies in the need to climb a tree and lure it out of a complex of hollows amid humid and slippery conditions. During our expedition, we walked in the evening and at night during low tide, managing to collect only two of them,” Narin said.
The research team conducting a site area survey recently discovered an electric-blue tarantula near the type locality. Photo by Narin Chomphuphuang
“The first specimen we found was on a tree in the mangrove forest. Collecting them was challenging due to the muddy and waterlogged ground. These tarantulas inhabit hollow trees, and the difficulty of catching an electric-blue tarantula lies in the need to climb a tree and lure it out of a complex of hollows amid humid and slippery conditions. During our expedition, we walked in the evening and at night during low tide, managing to collect only two of them,” Narin said.
Catching an electric-blue tarantula is challenging due to the need to climb a tree and lure it out from a complex of hollows with a humid and slippery surface. Photo by Narin Chomphuphuang
“Allow us to introduce our exciting discovery: a new species of tarantula that exhibits a mesmerizing blue-violet hue, reminiscent of electric blue sparks. The secret behind the vivid blue coloration of our tarantula lies not in the presence of blue pigments, but rather in the unique structure of their hair, which incorporates nanostructures that manipulate light to create this striking blue appearance,” Narin said.
Blue is one of the rarest colors to appear in nature, which makes blue coloration in animals particularly fascinating. The scarcity of the color blue in nature can be attributed to the challenges associated with absorbing and reflecting specific wavelengths of light. Blue is difficult to produce in nature because, to appear blue, an object needs to absorb very small amounts of energy while reflecting high-energy blue light. This is challenging, because blue light has shorter wavelengths and higher energy compared to other colors. Generating molecules capable of absorbing this energy is complex, making blue in nature relatively rare.
Close-up of the font C. natanicharum displaying a blue-violet hue. Photo by Yuranan Nanthaisong
In essence, what we perceive as a blue tarantula is, in fact, a result of how light interacts with the nanostructure-covered hairs on the tarantula’s body, causing some colors to cancel each other out and allowing only blue to be reflected. These biological photonic nanostructures create a remarkable iridescent effect that changes as you alter your viewing angle, making the tarantula even more captivating.
Photo by Yuranan NanthaisongPhoto by Narin ChomphuphuangPhoto by Narin Chomphuphuang
What’s even more fascinating is its ability to not only display blue but also a beautiful violet hue. Violet light occupies only a small portion of the visible light spectrum, and there are very few nanostructures precise enough to exclusively scatter violet light. Moreover, violet wavelengths are even more energetic than blue.
The violet hue of the top view depends on the viewing angle due to the iridescent effect from biological photonic nanostructures. Photo by Yuranan Nanthaisong
In terms of coloration, female and juvenile male C. natanicharum exhibit unique characteristics attributed to the presence of two distinct types of hair. Notably, they possess a more pronounced metallic-blue coloration on various parts of their bodies, while violet hues are predominantly observed in specific areas such as the chelicera, carapace, and certain leg segments. In adult male C. natanicharum, a similar coloration pattern is retained on the chelicera, carapace, and legs, although it appears less intense compared to females. Furthermore, there is a notable shift in coloration on their legs and body, transitioning to white due to the increased density of white setae.
Juvenile C. natanicharum Photo by Yuranan NanthaisongAdult male C. natanicharumPhoto by Paveen Piyatrakulchai
“This species was previously found on the commercial tarantula market. There, it was known as the “Chilobrachys sp. Electric Blue Tarantula” but no documentation existed describing its distinctive features or natural habitat. The exact location where the Electric Blue Tarantula lived remained a mystery until our recent discovery. This has led us to speculate that C. natanicharum may be present in the southern region of Thailand, especially in the remaining forest areas close to where it was found,” Narin said.
The habitat of C. natanicharum includes mangrove forests (left) and highland (right) Photos by Narin Chomphuphuang
According to a study just published in the journal ZooKeys, C. natanicharum exhibits adaptability in inhabiting evergreen and mangrove forests, where tarantulas live inside tree hollows. They can be found at elevations ranging from sea level to highland areas, and live in both arboreal and terrestrial burrows within evergreen forests, at elevations of up to 57 m.
“Unlike our previous discovery, the bamboo culm tarantula, which is specifically associated with bamboo, the electric blue tarantula demonstrates remarkable adaptability. These tarantulas can thrive in arboreal as well as terrestrial burrows in evergreen forests. However, when it comes to mangrove forests, their habitat is restricted to residing inside tree hollows due to the influence of tides, and they cannot be found living terrestrially within mangroves.” Narin said.
Photo by Narin Chomphuphuang
The scientific name of Chilobrachys natanicharum was chosen after an auction campaign for naming the new species. The winner of the auction campaign was Nichada Properties Co., Ltd., Thailand, which suggested a combination of the names of Mr. Natakorn Changrew and Ms. Nichada Changrew, who are company executives.
All proceeds from the auction were donated to support the education of Lahu children in Thailand and poor cancer patients.
“The Lahu people are an indigenous hill tribe in northern Thailand (Musoe) and are known for their vibrant culture and traditional way of life. Unfortunately, many Lahu children are denied access to education due to poverty, leaving them with limited opportunities for their future. The goal is to help change this by providing educational opportunities for Lahu children, giving them a chance to break out of the cycle of poverty. Additionally, cancer remains a significant public health issue globally, affecting millions of people each year. Many cancer patients struggle with financial hardship, which can make accessing quality care even more difficult. We believe that everyone deserves access to quality healthcare, regardless of their financial situation,” the researchers write in their paper.
The proceeds from the auction campaign to choose the scientific name of the new species C. natanicharum were used to support Lahu children in Thailand. Photo by JoCho Sippawat
“We often encounter the question, ‘What are the benefits of studying new species of tarantulas?’ It’s essential for the general public to understand the significance of taxonomy as a fundamental aspect of research. Taxonomy serves a vital role, ranging from the basic, such as when people inquire on social media about the name of a spider, to conducting crucial research aimed at preserving these species from extinction.” Narin said.
These mangrove forest areas serve as the habitat for the electric-blue tarantula C. natanicharum. Photo by Narin Chomphuphuang.
Mangrove forests are invaluable ecosystems offering numerous benefits. However, they face the looming threat of deforestation, which is a destructive process caused by activities such as logging, commercial development, pollution, overfishing, and the impacts of climate change. The electric blue tarantula, the first tarantula species discovered in the mangrove forests of Thailand, is also one of the world’s rarest tarantulas. “When we examine the causes behind the decline of mangrove forests, it becomes apparent that many of these threats are human-induced, both directly and indirectly. This raises a critical question: Are we unintentionally contributing to the destruction of their natural habitats, pushing these unique creatures out of their homes? Or should we advocate for the protection of mangrove forests, not only for the sake of the Electric-Blue Tarantula but also for the preservation of this remarkable jewel of the forest?,” the researchers ask.
Research article:
Chomphuphuang N, Sippawat Z, Sriranan P, Piyatrakulchai P, Songsangchote C (2023) A new electric-blue tarantula species of the genus Chilobrachys Karsh, 1892 from Thailand (Araneae, Mygalomorphae, Theraphosidae). ZooKeys 1180: 105-128. https://doi.org/10.3897/zookeys.1180.106278
Spiders of the family Araneidae are known for building vertical orbicular webs to catch upon prey. They can be easily identified by their eye pattern, the abdomen normally overlapping the carapace, and complex genitalia. The family currently has 188 genera and 3,119 species worldwide.
Two scientists from Murdoch University in Perth (Australia), Dr Pedro Castanheira and Dr Volker Framenau, described a new spider genus of Araneids following a comprehensive study of orb-weaving spiders found in Australian zoological collections. They named it after one of their favourites bands, the Swedish pop group ABBA, paying tribute to the band members Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad.
The band’s “songs and subsequent musicals Mamma Mia! (2008) and Mamma Mia – Here We Go again! (2018), provided hours of entertainment for the authors,” they explain in their study, which was published in the journal Evolutionary Systematics.
Abba transversa. Photo by Volker Framenau
The new genus is composed of a relatively small single species (ca. 3-4 mm), Abba transversa (Rainbow, 1912), whose specimens are currently known from the coastal area of New South Wales and Queensland. It is differentiated from other species within the family by the presence of two dark spots in the middle of abdomen and by the thick macrosetae on the first pair of legs of the males.
The description comes after 15 years of scientific work, with the researchers looking at 12,000 records in Australian museums and overseas collections.
“Describing new taxa is vital for conservation management plans to assess biodiversity and protect forests areas across Australia,” says study author Dr Pedro Castanheira. “Currently, 80% of Australian spider species are unknown, and many of the described ones are misplaced in different genera, like Abba transversa used to be.”
Original source:
Castanheira PS, Framenau VW (2023) Abba, a new monotypic genus of orb-weaving spiders (Araneae, Araneidae) from Australia. Evolutionary Systematics 7(1): 73-81. https://doi.org/10.3897/evolsyst.7.98015
It was 02:00h on 11 January 2009 when the sea along the coastline of Australia’s “Sunshine State” of Queensland receded to such an extent that it exposed a population of water-adapted spiders. The observant researchers who would later describe these spiders as a species new to science, were quick to associate their emergence with reggae legend Bob Marley and his song “High Tide or Low Tide”.
In their paper, published in the open access journal Evolutionary Systematics, the team of Drs. Barbara Baehr, Robert Raven and Danilo Harms, affiliated with Queensland Museum and the University of Hamburg, describe the new Bob Marley’s intertidal spider and also provide new information on two of its previously known, yet understudied, relatives from Samoa and Western Australia.
Unlike the spiders which people are familiar with, the intertidal species, whose representative is Bob Marley’s namesake, are truly marine. They have adapted to the underwater life by hiding in barnacle shells, corals or kelp holdfast during high tide. To breathe, they build air chambers from silk. Once the sea water recedes, though, they are out and about hunting small invertebrates that roam the surfaces of the nearby rocks, corals and plants.
The new species, listed under the scientific name of Desis bobmarleyi, is described based on male and female specimens spotted and collected from brain coral on that night in January.
Both sexes are characterised by predominantly red-brown colours, while their legs are orange-brown and covered with a dense layer of long, thin and dark grey hair-like structures. The females appear to be larger in size with the studied specimen measuring nearly 9 mm, whereas the male was about 6 mm long.
While the exact distribution range of the newly described species remains unknown, it is currently recorded from the intertidal zones of the Great Barrier Reef on the north-eastern coast of Queensland.
“The song ‘High Tide or Low Tide’ promotes love and friendship through all struggles of life,” explain the authors for their curious choice of a name. “It is his music that aided a field trip to Port Douglas in coastal Queensland, Australia, to collect spiders with a highly unique biology.”
Apart from reporting their research, the scientists use their paper to pay tribute to a German naturalist from the late 19th century – Amalie Dietrich, as well as the famous Jamaican singer and songwriter. Both admirable figures, even if representative of very different fields, are seen by the authors as examples of “the adventurous and resilient at heart” human nature in pursuit of freedom and independence.
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Original source:
Baehr BC, Raven R, Harms D (2017) “High Tide or Low Tide”: Desis bobmarleyi sp. n., a new spider from coral reefs in Australia’s Sunshine State and its relative from Sāmoa (Araneae, Desidae, Desis). Evolutionary Systematics 1: 111-120. https://doi.org/10.3897/evolsyst.1.15735
Subject to continuing population decline due to a number of factors, an exclusively cave-dwelling (troglobitic) spider endemic to the Azores is considered as Critically Endangered according to the IUCN Red List criteria.
Together, they make use of a specialised novel publication type feature, called Species Conservation Profile, created by the open access journal Biodiversity Data Journal, to provide scholarly credit and citation for the IUCN Red List species page, as well as pinpoint the population trends and the reasons behind them.
The studied spider species (scientifically called Turinyphia cavernicola) is a pale creature with long legs, large eyes and a total size of merely 2 mm in length. These spiders never leave their underground habitats, which are strictly humid lava tubes and volcanic pits. There they build sheet webs in small holes and crevices on the walls of the caves.
Not only is the species restricted to a single island within the Azorean archipelago (Portugal), but it is only found in three caves. Furthermore, out of the three, only one of them is home to a sustainable large population. These caves are under severe threat due to pasture intensification, road construction and tourist activities.
Although there is not much information about the species distribution through the years, with the spider having been discovered as recently as in 2008, the authors make the assumption that originally there have been significantly greater populations. Not only have they studied thoroughly another fifteen caves located on the island without finding any individuals, but they have identified increasing anthropogenic impact on the habitat.
“The species original distribution was potentially very large compared with the current,” the scientists explain. “Relatively intensive searches in and around the current caves where the species occurs have failed to find additional subpopulations.”
“The trend of decline is based on the assumption that this species can occur in all these caves and that the absence is due to anthropogenic disturbance on caves during the last 50 years,” they note.
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Original source:
Borges P, Crespo L, Cardoso P (2016) Species conservation profile of the cave spiderTurinyphia cavernicola (Araneae, Linyphiidae) from Terceira Island, Azores, Portugal.Biodiversity Data Journal 4: e10274. doi: 10.3897/BDJ.4.e10274
The image that comes to mind when we think of new species being discovered is that of scientists sampling in remote tropical forests, where humans have barely set foot in. However, new species waiting to be discovered can in fact be very close to us, even if we live in a strongly humanized continent like Europe.
Scientists Eduardo Morano, University of Castilla-La Mancha, and Dr Raul Bonal, University of Extremadura, have discovered a new species of spider, formally called Cheiracanthium ilicis, in an area which does not match the image of a pristine habitat at all.
The new species was found in a strongly humanized area in central Spain, specifically, in isolated trees at the borders of cereal fields. These trees, mainly Holm oaks (Quercus ilex), are those remaining of the former oak woodlands that once covered the Iberian Peninsula and which have been cleared for centuries.
The systematic sampling revealed the newly discovered spider had a an exclusive preference for Holm Oaks, as all individuals were collected from the trunks and branches of these trees. Therefore, it was named after this tree’s scientific name “ilicis”.
While adults measure about a centimetre in body length, juveniles are smaller and have greenish colouration that mimics new oak shoots.
The mouthparts are proportionally large, as in the case of other species of the genus, like closely related C. mildei. In the case of the latter, the mouthparts are large enough to penetrate human skin, although the effects of the poison appear mild.
From a conservation perspective, the present study puts forward the need to preserve isolated trees in agricultural landscapes. They are not only a refuge to common forest organisms but to novel species yet to be discovered as well.
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Original source:
Morano E, Bonal R (2016) Cheiracanthium ilicis sp. n. (Araneae, Eutichuridae), a novel spider species associated with Holm Oaks (Quercus ilex). ZooKeys 601: 21-39. doi: 10.3897/zookeys.601.8241
A new species of tarantula named after the famous singer-songwriter Johnny Cash is one of fourteen new spiders discovered in the southwestern United States. While these charismatic spiders have captured the attention of people around the world, and have been made famous by Hollywood, little was actually known about them. The new descriptions nearly double the number of species known from the region. Biologists at Auburn University and Millsaps College have described these hairy, large-bodied spiders in the open-access journal ZooKeys.
“We often hear about how new species are being discovered from remote corners of the Earth, but what is remarkable is that these spiders are in our own backyard,” says Dr. Chris Hamilton, lead author of the study. “With the Earth in the midst of a sixth mass extinction, it is astonishing how little we know about our planet’s biodiversity, even for charismatic groups such as tarantulas.”
Tarantulas within the genus Aphonopelma are among the most unique species of spider in the United States. One aspect of this distinctiveness that is particularly intriguing is the extreme size differences that can be found between species. Some species are quite impressive, reaching six inches (15 centimeters) or more in leg span, while others can fit on the face of an American quarter-dollar coin (see Image 1).
Within the United States, Aphonopelma are found in twelve states across the southern third of the country, ranging west of the Mississippi River to California. These spiders are conspicuous during the warmer months when adult males abandon their burrows in search of mates, yet very little was known about these spiders prior to the study. Dr. Hamilton notes that more than fifty different species of tarantulas had been previously reported from the United States, but that many of them were poorly defined and actually belonged to the same species.
To gain a better understanding of the diversity and distributions of these spiders, the research team spent more than a decade searching for tarantulas throughout scorching deserts, frigid mountains, and other locations in the American Southwest, sometimes literally in someone’s backyard. They studied nearly 3,000 specimens, undertaking the most comprehensive taxonomic study ever performed on a group of tarantulas.
Because most species of tarantula in the United States are very similar in appearance and cannot be distinguished from each other using anatomical features alone, the research team implemented a modern and “integrative” approach to taxonomy by employing anatomical, behavioural, distributional, and genetic data. Their results indicate there are 29 species in the United States, 14 of which are new to science.
Of the new species, one has been named Aphonopelma johnnycashi after the influential American singer-songwriter Johnny Cash. Dr. Hamilton coined the name because the species is found in California near Folsom Prison (famous for Cash’s song “Folsom Prison Blues”) and because mature males are generally solid black in coloration (paying homage to Cash’s distinctive style of dress where he has been referred to as the “Man in black”) (see Image 2).
While the researchers found that most species are abundant and have relatively large distributions, they also noted that some have highly restricted distributions and may require conservation efforts in the not-so-distant future, as they lose their habitats due to climate change and human encroachment.
“Two of the new species are confined to single mountain ranges in southeastern Arizona, one of the United States’ biodiversity hotspots,” says Brent Hendrixson, a co-author of the study. “These fragile habitats are threatened by increased urbanization, recreation, and climate change. There is also some concern that these spiders will become popular in the pet trade due to their rarity, so we need to consider the impact that collectors may have on populations as well.”
In addition to spider specimens collected by the research team, the study used a tremendous number of specimens gathered from museum collections across the United States, including the Auburn University Museum of Natural History (AUMNH). Project senior author Dr. Jason Bond, director of the AUMNH, notes that studies like these highlight the critical role that museum collections play in understanding our planet’s biodiversity. The AUMNH, located in Auburn, Alabama, possesses the second largest collection of Aphonopelma in the world, behind the American Museum of Natural History in New York.
Tarantulas have gained notoriety for their imposing appearance and perceived threat to humans, but Dr. Hamilton notes that the fear is largely unfounded and that the species in the United States do not readily bite, are not dangerous, and are really just “teddy bears with eight legs”.
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Original source:
Hamilton CA, Hendrixson BE, Bond JE (2016) Taxonomic revision of the tarantula genusAphonopelma Pocock, 1901 (Araneae, Mygalomorphae, Theraphosidae) within the United States.ZooKeys 560: 1-340. doi: 10.3897/zookeys.560.6264
Having been attacked, paralysed and implanted with a wasp egg to its belly, a wolf spider carries on with its life fully mobile and active. At least, until it is time for the larva to reach out for its first solid meal at a certain development stage. The present study, conducted by a Brazilian team of scientists, led by PhD student Hebert da Silva Souza, Universidade Estadual de Campinas, Sao Paulo, and published in the open-access Journal of Hymenoptera Research, follows the entire cycle of larval development from the egg laying through the formation of a full-grown wasp.
The herein observed wasp species, called Paracyphononyx scapulatus, belongs to a well-known group of spider parasites, which after laying their eggs on a paralysed spider, let it recover and continue living fully mobile until the larvae are mature. However, little has been known about this curious behaviour of this wasp species in particular, since previous studies have already showed differences between the separate members of the genus.
To observe the whole cycle of the wasp larval development, the researchers caught a recently parasitised wolf spider and placed it in a plastic container.
While the larva grew and fed on the abdominal hemolymph, which is the analog to the blood in backboned creatures, its host did not show any peculiarities in its behaviour and even kept its routine being active at night and resting during the day. This is suggested to be attributed to the need of the larva to keep its host safe from predators, such as ants, which could otherwise eat the dead body.
However, ahead of its fifth and last development stage, the larva was seen to double its size and, in the morning, twenty days after the hatching of the egg, it killed its host and fully consumed it within the next forty-eight hours. Having left its host, the larva began to search for a place within the container to construct a cocoon, which took it sixteen hours. Thirty-two days later, a fully grown female wasp emerged.
In comparison, a relative of the observed spider wasp is known to manipulate its host’s behaviour, making it to enwrap itself and the larva in a cocoon-like silken structure so that it is protected while feeding. Yet, it is not certain whether the observed larva’s growth in captivity is not the reason why it had not induced similar behaviour.
In conclusion, the authors suggest that further investigation of the interaction between the two species could provide more information about the evolution of this kind of parasitism, which is likely to have developed independently among the wasp groups.
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Original source:
Souza HS, Messas YF, Masago F, dos Santos ED, Vasconcellos-Neto J (2015) Paracyphononyx scapulatus (Hymenoptera, Pompilidae), a koinobiont ectoparasitoid of Trochosa sp. (Araneae, Lycosidae). Journal of Hymenoptera Research 46: 165-172. doi: 10.3897/JHR.46.5833
