Four new species of tarantulas, including one new genus, have been described from India’s Western Ghats mountains.
A concerning trend shows that 25% of newly described tarantula species since 2000 have appeared in the pet trade, with some appearing for sale within months of being scientifically described.
Tarantulas face dual threats from illegal collection for the pet trade and habitat loss in the Western Ghats, where many are found only in small patches of remaining forest surrounded by tea plantations.
These spiders serve as important predators and indicators of healthy habitats in their ecosystems, but are particularly vulnerable due to their slow reproduction rates and the difficulty in detecting them during smuggling attempts.
A researcher described four new species of tarantulas, including one new genus, from India’s Western Ghats, a chain of mountains running along the country’s west coast.
“Most people in India are not even aware that there are tarantulas in India when there are more than 60 species in the country,” Zeeshan Mirza, from the Max Planck Institute for Biology in Germany, who found and described the species, told Mongabay.
The large, fuzzy spiders live in tree hollows, along streams and forest paths, and in forest patches. They exhibit interesting behaviors, such as females carrying their egg sacs under their mouth parts (or chelicerae) or creating hammock-like web structures to protect their eggs.
Zeeshan Mirza with one of the new tarantula species from the Western Ghats. Mirza has discovered several species of reptiles in India as well. Photo courtesy of Mirza.
One of the new species, named Haploclastus bratocolonus (meaning “tree dweller”), makes its home in hollow trees along rivers. Another species, Haploclastus montanus, was found living at elevations higher than 2,000 meters (6,600 feet) in mountain forests, making it one of the highest-living tarantulas known from the region. Some of the new species were found in the rare small fragments of remaining shola forest surrounded by tea plantations.
Among the species was an entirely new genus of tarantulas called Cilantica, named after the Tamil word for spider. They can be identified by the unique scattered pattern of curved bristles on their bodies, unlike the C-shaped arrangement of bristles found in other tarantulas.
Tarantulas serve important roles in their forest homes, acting as biological pest controllers and preying on smaller invertebrates and vertebrates. “They also form part of the diet of other species like spider wasps and small carnivores,” Mirza said. “They are keystone species and indicators of undisturbed habitats.”
A female Haploclastus montanus, a new species of tarantula found in the Western Ghats. Photo courtesy of Zeeshan Mirza The burrow of a newly described tarantula genus in the Western Ghats if India. Photo courtesy of Zeeshan Mirza.
However, there’s trouble for tarantulas across the globe. A recent study reveals that 25% of all newly described tarantula species since 2000 have ended up in the international pet trade, meaning many spiders could be at risk from collectors before we can fully understand them
Alice Hughes, a biologist at the University of Hong Kong who studies the global trade in arachnids, found that rare spiders often appear for sale shortly after being scientifically described. Her research revealed that an estimated 1,264 arachnid species are currently traded worldwide.
More than 73% of arachnid species sold online aren’t listed in international trade monitoring systems, according to Hughes’s research. “For most of these species we don’t have the data, but we’re also focusing so much on species like elephants, that we’ve forgotten that literally 99.9% of [arachnid] species are not getting the level of attention they deserve,” she said.
Cilantica agasthyaensis is one of the new species included in a new genus of trantulas from the Western Ghats. Photo courtesy of Zeeshan Mirza.
The problem is made worse because detecting a smuggled tarantula is difficult. “Tarantulas cannot be detected easily through X-ray-based screening at airports as they lack bones,” Mirza said.
He added the speed at which newly discovered species can end up in the pet trade is alarming. For example, the tarantula Haploclastus devamatha was described from the Indian state of Kerala in 2014, and within eight months was being “sold in several online pet stores,” he said. “Even now, many pet stores have this species on sale on their websites.”
Tarantulas are especially vulnerable to overcollection because they reproduce slowly and live a long time (10-20 years or more). Many species are found only in small areas, meaning too much collecting could wipe out entire populations.
“As a researcher, I am worried about the fate of the new species I described,” Mirza said.
Silent Valley National Park in India’s Western Ghats. Some of the mountain range is protected, but many areas face threats from development and hunting. Photo courtesy of Zeeshan Mirza.
The discovery of the new tarantula species underscores both the region’s biological richness and the ongoing need for conservation efforts. The Western Ghats, recognized as a biodiversity hotspot, harbor numerous endemic species found nowhere else on Earth. While parts of it are protected, the ecosystem faces threats from deforestation, agriculture and climate change. The paper suggests that these tarantulas could serve as flagship species for invertebrate conservation in the Western Ghats.
To protect these spiders, Mirza suggested several solutions. People living in areas with tarantulas can help by reporting illegal collection to forest departments. He also recommended better training for customs and airport security, possibly including sniffer dogs to detect smuggled spiders.
For tarantula enthusiasts, Mirza offered clear advice: “Tarantula enthusiasts can be more responsible and only choose species that have been captive-bred and are not sourced illegally.”
Banner image of Zeeshan Mirza, with one of the four new tarantula species he found in India’s Western Ghats.
Liz Kimbrough is a staff writer for Mongabay and holds a Ph.D. in Ecology and Evolutionary Biology from Tulane University, where she studied the microbiomes of trees. View more of her reporting here.
Mirza ZA (2024) Systematics of the Western Ghats endemic tarantula subfamily Thrigmopoeinae with the description of a new genus and four new species. Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” 67(2): 183-234. https://doi.org/10.3897/travaux.67.e112517
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Scientists described numerous new species this past year, the world’s smallest otter in India, a fanged hedgehog from Southeast Asia, tree-dwelling frogs in Madagascar, and a new family of African plants.
Experts estimate that fewer than 20% of Earth’s species have been documented by Western science, with potentially millions more awaiting discovery.
Although species may be new to science, many are already known to local and Indigenous peoples and have traditional names and uses.
Upon discovery, many new species are assessed as threatened with extinction, highlighting the urgent need for conservation efforts.
A giant anaconda, a vampire hedgehog, a dwarf squirrel, and a tiger cat were among the new species named by science in 2024. Found from the depths of the Pacific Ocean to the mountaintops of Southeast Asia, each new species shows us that even our well-known world contains unexplored chambers of life.
This year, in Peru’s Alto Mayo Landscape alone, scientists uncovered 27 new-to-science species, including four new mammals, during a two month expedition. Meanwhile, the Greater Mekong region yielded 234 new species, and scientists from the California Academy of Sciences described 138 new species globally. The ocean depths continued to surprise, with more than 100 potentially new species found on an unexplored underwater mountain off Chile’s coast. Two new mammal species were found in India this year, including the world’s smallest otter.
Scientists estimate only a small fraction of Earth’s species have been documented, perhaps 20% at best. Even among mammals, the best-known group of animals, scientists think we’ve only found 80% of species. Yet most of the hidden species are likely bats, rodents, shrews, moles and hedgehogs.
Members of Indigenous Awajun communities in Peru’s Alto Mayo assist scientists with their research, such as throwing cast nets to capture fish. 68 fish species were collected, including eight that are new to science. Photo courtesy of Conservation International/ Trond Larsen.
However, while species may be new to Western science, many have been well known to Indigenous peoples and local communities for generations. These communities often maintain sophisticated classification systems and deep ecological knowledge about species’ behaviors, uses and roles in local ecosystems.
“For example, the blob-headed fish, which is so bizarre and unusual, and scientists have never seen anything like it, but it’s very familiar to the Awajún,” Trond Larsen, the leader of the Alto Mayo expedition in Peru from the NGO Conservation International, told Mongabay. “They regularly catch and eat them.” Similarly, the ghost palm, newly named by scientists this year, has been used by Iban communities in Borneo for basketry and food for decades.
Unfortunately, many species may be threatened with extinction before they’re even formally named, victims of human activities like development and climate change. Some of these species could be foods or medicines for humans, but each has a unique role in Earth’s interconnected web of life.
“There is something immensely unethical and troubling about humans driving species extinct without ever even having appreciated their existence and given them consideration,” Walter Jetz, a professor of ecology and evolutionary biology at Yale University, U.S., told Mongabay.
Here’s our look at some of the new-to-science species described in 2024:
The Greater Mekong region revealed some of the year’s most distinctive species. Local nature enthusiasts and researchers documented a hedgehog species with fang-like teeth, leading to its name vampire hedgehog (Hylomys macarong).
They also described a pit viper (Trimeresurus ciliaris) whose scales create the appearance of dramatic eyelashes, and a karst dragon lizard (Laodracon carsticola) first noticed by a local tour guide.
These findings illuminate the region’s rich biodiversity and conservation challenges, as many species face immediate threats from development and wildlife trafficking.
Northern green anaconda, a new species found in Ecuador, feeding on a large lizard. Photo by Jesus Rivas.
A significant discovery has been made in the Ecuadorian Amazon, where scientists have identified a new species of giant anaconda in the Bameno region of Baihuaeri Waorani Territory. During their research, the team encountered an impressive female specimen measuring 6.3 meters (20.7 feet) in length from head to tail, though local Indigenous communities report encountering even larger individuals. The species faces multiple threats throughout its range, from deforestation destroying their habitat to direct hunting by humans and environmental degradation from oil spills.
One of the newly named frogs, Guibemantis ambakoana. Ambakoana means ‘living within Pandanus’ in Malagasy. Image courtesy of Hugh Gabriel.
In Madagascar’s eastern rainforests, three frog species living in pandan trees received their first scientific descriptions. Known locally as sahona vakoa (pandan frogs), these amphibians complete their entire life cycle within the water-filled spaces between the plants’ spiky leaves. The species, now given the scientific names Guibemantis rianasoa, G. vakoa and G. ambakoana, exemplify how local ecological knowledge often precedes formal scientific documentation by generations.
A Chaunacops, a genus of bony fish in the sea toad family, seen at a depth of nearly 1,400 m (4,560 ft) on Seamount SF2 inside Nazca-Desventuradas Marine Park. Image courtesy of Schmidt Ocean Institute. CC BY-NC-SA A rarely seen Bathyphysa conifera, commonly known as flying spaghetti monster was documented on an unnamed and unexplored seamount along the Nazca Ridge off the coast of Chile. Image courtesy of ROV SuBastian / Schmidt Ocean Institute (CC BY-NC-SA 4.0).
An expedition in the Southeast Pacific discovered more than 100 potentially new-to-science species on a previously unknown underwater mountain, including deep-sea corals (order Scleractinia), glass sponges, sea urchins (class Echinoidea), amphipods (order Amphipoda) and squat lobsters (family Galatheidae).
The expedition also sighted rare creatures like the flying spaghetti monster (Bathyphysa conifera) and Casper octopus (genus Grimpoteuthis).
The seamount, rising about 3 kilometers (nearly 2 miles) from the seafloor, about 1,450 km (900 mi) off Chile’s coast, hosts thriving deep-sea ecosystems with ancient corals and glass sponges. The findings highlight the rich biodiversity of the high seas as the U.N. finalizes treaties to protect international waters.
A new-to-science frog species from Vietnam identified as the Mount Po Ma Lung toothed toad (Oreolalax adelphos). Image courtesy of Zoological Society of London.
Two new species of rare, toothed toads were discovered in Vietnam and China: the Mount Po Ma Lung toothed toad (Oreolalax adelphos) and the Yanyuan toothed toad (Oreolalax yanyuanensis). These amphibians are characterized by an unusual row of tiny teeth on the roof of their mouths. The discovery brings the total known toothed toad species to 21. However, more than half are already considered threatened due to habitat loss and degradation.
This ‘blob-headed’ fish (Chaetostoma sp.), is new to science and was a shocking discovery due to its enlarged blob-like head, a feature that the fish scientists have never seen before, even though this species is already familiar to the Indigenous Awajun people who worked with scientists. It is a type of bristlemouth armored catfish. Photo courtesy of Conservation International / Robinson Olivera. This dwarf squirrel species (Microsciurus sp.) is a very small squirrel that is difficult to spot in the rainforest where it moves quickly and hides among tree branches. After proper taxonomic revision, this species that is new to science will also belong to a new genus. Photo courtesy of Conservation International/Ronald Diaz. A semi-aquatic (amphibious) mouse (Daptomys sp.) that is new to science from Peru’s Alto Mayo. The species belongs to a group of rodents that is considered among the rarest in the world, and the few species that are known have only been observed a handful of times by scientists, with much still to be learned about their ecology. Photo courtesy of Conservation International/Ronald Diaz.
In Peru’s densely populated Alto Mayo region, home to 280,000 people, scientists working with local communities documented 27 species previously unknown to Western science.
The species included an amphibious mouse (Necromys aquaticus) found in just one patch of swamp forest; a fish with an unexplained blob-like head structure (Trichomycterus sp. nov.); an agile dwarf squirrel (Microsciurus sp. nov.); and a tree-climbing salamander (Bolitoglossa sp. nov.). These findings demonstrate how even human-modified landscapes can harbor biodiversity not yet documented by scientists.
Leopardus pardinoides, or the clouded tiger cat, as a new species. This small wildcat is found in the cloud forests of Costa Rica, south to Panama, Colombia, Peru, Bolivia and Argentina. Colombia and Costa Rica are key locations for the conservation. Image courtesy of Camilo Botero.
Scientists formally described a new small wild cat species, the clouded tiger cat (Leopardus pardinoides), found in high-altitude cloud forests from Central to South America. This taxonomic clarification has major conservation implications, as new data indicate all three tiger cat species have experienced dramatic range reductions, with the clouded tiger cat’s habitat particularly threatened by human activities.
The ghost palm (Plectocomiopsis hantu) from Borneo was already known to local communities. Benedikt Kuhnhäuser / RBG Kew
Though long used by local Iban communities in western Borneo for basketry and edible shoots, scientists finally gave a formal name to a distinctive rattan palm after 90 years. Named Plectocomiopsis hantu (“hantu” meaning ghost in Indonesian and Malay), the palm is known for its ghostly appearance, with white undersides to the leaves and gray stems. It’s currently known from only three locations in or near protected rainforest habitats.
Scientists named an entirely new family of plants, Afrothismiaceae, which have evolved to take all their nutrients from fungal partners rather than through photosynthesis. Found in African forests, these rare plants only appear above ground to fruit and flower. Most species in this family are extremely rare or possibly extinct, with the majority recorded only once in Cameroon.
Indonesia is home to exceptional biodiversity including the orchid Dendrobium cokronagoroi (left) and Mediocalcar gemma-corona (right), two of the five new orchids described from Indonesia. Photos courtesy of Jeffrey Champion and Andre Schuiteman RBG Kew.
The orchid family is immense, and new species are found most years. This year, researchers described five new species from islands throughout Indonesia. These are: Coelogyne albomarginata from Sumatra, Coelogyne spinifera from Seram, and Dendrobium cokronagoroi, the Dendrobium wanmae (a critically endangered species) and Mediocalcar gemma-coronae (endangered), all from western New Guinea.
The habitat of Chlorohiptage vietnamensis is being destroyed for the manufacture of cement. Photo courtesy of Truong VanDo/RBG Kew.
A new genus and species of green-flowered liana, Chlorohiptage vietnamensis, was discovered in Vietnam but is already assessed as critically endangered. Its limestone karst habitat is being cleared for quarries to make cement, threatening the only known population of this unique plant.
Small-clawed otter (Aonyx cinereus), the world’s tiniest otter species, photographed for the first time in Kaziranga. Photo courtesy of Arun Vignesh. Binturong (Arctictis binturong), the largest civet species, was also photographed for the first time in Kaziranga. Photo courtesy of Chirantanu Saikia.
Two new mammal species in were described in Kaziranga National Park and Tiger Reserve, Northeast India’s biggest national park. A forest officer documented the presence of the small-clawed otter (Aonyx cinereus), the world’s tiniest otter species. The small-clawed otter, protected under Schedule I of the Wildlife Protection Act 1972, joins two other otter species already known to inhabit Kaziranga.
The binturong (Arctictis binturong), an elusive nocturnal tree-dweller also known as the bearcat, was photographed by tour guide Chirantanu Saikia in January 2024. The binturong is found exclusively in Northeast India and requires dense forest canopy for survival. It has become increasingly rare due to deforestation.
While local residents had previously reported sightings of both species, these photographs provide the first concrete evidence of their presence in the park. Conservation officials believe these discoveries suggest the potential presence of other undocumented species within the park, highlighting the importance of continued wildlife surveys and protection efforts in the region.
Brachycephalus dacnis rests on a fingertip. Photo courtesy of Lucas Machado Botelho.
Scientists in Brazil’s Atlantic Forest described a remarkable new species of frog, Brachycephalus dacnis, measuring just 6.95 millimeters in length – about the size of a pencil eraser. Unlike other similarly tiny frogs that often struggle with balance, this species has maintained its inner ear structure, allowing it to jump gracefully up to 32 times its body length. The discovery in São Paulo state’s remaining Atlantic Forest highlights both the region’s rich biodiversity and the urgent need for conservation, as this critically threatened ecosystem now stands at just 13% of its original extent, potentially harboring many more undiscovered species.
Banner image of Leopardus pardinoides, or the clouded tiger cat, as a new species. This small wildcat is found in the cloud forests of Costa Rica, south to Panama, Colombia, Peru, Bolivia and Argentina. Image courtesy of Johanes Pfleiderer.
Liz Kimbrough is a staff writer for Mongabay and holds a Ph.D. in ecology and evolutionary biology from Tulane University, where she studied the microbiomes of trees. View more of her reporting here.
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