Tag: Colombia

Man’s best friend threatens endangered species’ survival

Dog attacks on mountain tapirs in Colombia highlight a growing threat to vulnerable wildlife.

Researchers who captured footage of dog attacks on endangered mountain tapirs in Colombia are calling for action to protect threatened wildlife.

Using camera traps, a team from WILD Campo Silvestre, the Tiger Cats Conservation Initiative, and the Fundación Caipora captured images of two attacks in the Campoalegre Soil Conservation District, Santa Rosa de Cabal in a period of two months.

Three black and white camera trap images of dogd chasing a mountain tapir in a forest.
Photographic evidence of domestic dogs chasing mountain tapirs in a private protected area of the Central Andes of Colombia. Credit: Cepeda-Duque et al.

The cameras caught domestic dogs (Canis lupus familiaris) chasing and attacking mountain tapirs (Tapirus pinchaque) in a protected area of the Central Andes. These images were subsequently published in a research paper published by the open-access journal, Neotropical Biology and Conservation.

The study offers insights into the impact of domestic dogs on wildlife, particularly on species of conservation concern such as the mountain tapir. The authors highlight the urgent need for population management and control of domestic dogs inside and around protected areas.

A map representing the area surveyed by the camera traps that detected the two events of dogs chasing and attacking mountain tapirs in the private natural Reserve “WILD Campo Alegre” situated at the north-eastern extreme of the Campoalegre Soil Conservation District, Santa Rosa de Cabal, Colombia.
Area surveyed by camera traps that detected the two events of dogs mountain tapirs in the private natural reserve. Credit: Cepeda-Duque et al.

Conservationists recently implemented measures such as neutering and vaccination programs for stray and owned dogs in the vicinity of natural reserves to protect the threatened clouded tiger cat (Leopardus pardinoides) in the region. The research team call for these measures to be extended to WILD Campo Alegre and surrounding lands.

An arial view of Campoalegre Soil Conservation District, Santa Rosa de Cabal, showing forests on rolling hills.
Campoalegre Soil Conservation District, Santa Rosa de Cabal. Credit: Camilo Botero.

“Domestic dog incursion into protected areas is a global threat to wildlife that is difficult to mitigate because of the inherent social dilemma of controlling dog populations,” says Juan Camilo Cepeda-Duque, lead author of the study.

“Dogs can contribute to the extinction of vertebrate species, can imbalance the trophic dynamics amongst predator guilds and even have the potential to collapse entire ecological communities,” he continues.

An endangered mountain tapir photographed in a dark forest.
Mountain tapir (Tapirus pinchaque). Credit: Camilo Botero.

The mountain tapir is an emblematic herbivore of the Andean cloud forest, globally classified as ‘Endangered’ according to the IUCN Red List due to habitat loss and poaching. The presence and aggressive behaviour of domestic dogs not only threaten the physical wellbeing of these tapirs but also their reproductive performance, foraging efficiency, and overall population health due to increased stress, potential for disease transmission, and alterations in habitat use.

The research team highlight that their observations are not isolated cases, as locals previously reported the same dogs chasing and attacking mountain tapirs and cattle. The conservationists are also concerned that they detected no juvenile mountain tapirs in the survey.

Study authors Juan Camilo Cepeda Duque (left) and Eduven Arango Correa (right) relaxing in a forest.
Study authors Juan Camilo Cepeda Duque (left) and Eduven Arango Correa (right) on site. Credit: Camilo Botero.

The NGO WILD Nature Foundation has established a new protected area in the northern extreme of the Campoalegre Soil Conservation District, with the target of protecting the habitat of endangered mountain tapirs and the last remnant populations of the fuerte’s parrot (Hapalopsittaca fuertesi) in the region. Currently, the reserve is carrying out an unprecedented restoration program, planting thousands of trees to recover the land once cleared for the establishment of cattle ranching.

Original source

Cepeda-Duque JC, Arango-Correa E, Frimodt-Møller C, Lizcano DJ (2024) Howling shadows: First report of domestic dog attacks on globally threatened mountain tapirs in high Andean cloud forests of Colombia. Neotropical Biology and Conservation 19: 25-33. https://doi.org/10.3897/neotropical.19.e117437

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For peace in Colombia: a new genus and five new species of pseudoscorpions

Looking into biological collections, pseudoscorpion researcher Catalina Romero-Ortiz found five new species and a new genus of these interesting creatures.

Guest blog post by Catalina Romero-Ortiz

Colombia is a South American country full of beautiful landscapes, indigenous cultures, delicious food, and warm people. In its territory, the country hosts an amazing diversity of birds, amphibians, vascular plants, fishes, among other biological groups, which makes it one of the biodiversity hotspots on Earth. The nation’s recent steps toward peace have allowed for the exploration of regions previously off-limits due to conflict.

A map showing the location of Colombia. Screenshot from OpenStreetMap.

Of all this diversity in Colombia, pseudoscorpions, little arachnids that resemble scorpions, are very little known. They can get mistaken for mites or fleas due to their size, but are entirely harmless to humans, with their venom glands only used for hunting and self-defense. Their cryptic behaviors make them difficult to find, which in turn makes them difficult to study. For a biodiversity hotspot like Colombia, researchers expect that there are more species out there than the 63 that are already known to science.

Looking into biological collections, pseudoscorpion researcher Catalina Romero-Ortiz found five new species and a new genus of these interesting creatures. Together with Dr. Mark Harvey from the Western Australian Museum and Dr. Carlos Sarmiento from the Instituto de Ciencias Naturales of the National University of Colombia, they recently described those findings in the scientific journal ZooKeys. They also proposed a new classification for a species that was only known by its description, contributing to the broader understanding of pseudoscorpions in Colombia. The star of their research is the newfound genus Paciwithius.

Newly described pseudoscorpion species: A Paciwithius chimbilacus, B Cystowithius florezi, C Parawithius bromelicola, D Oligowithius achagua. Scale bars: 0.5 mm.

A peculiar name

To understand the meaning of the genus name, which refers to the Latin for peace, pax, we should look at the history of this beautiful country. Since the early 20th century, Colombia has grappled with an ongoing civil conflict, particularly in rural areas. Starting in 1946 with the rise of the Guerrilla, this historic period named “La Violencia” claimed millions of lives. Over the years, the dynamics of the conflict evolved, but violence persisted. The 1980s witnessed the rise of the narco-era, plunging the entire nation into a vortex of violence. With the emergence of paramilitary forces vying for control of the drug trade, violent clashes with guerrillas further escalated the bloodshed.

In 2012, peace negotiations began in Colombia, and in 2016 the Peace agreement with the biggest Guerrilla group was established. Prior to this, a process of reconciliation was initiated with paramilitary groups. With the perception that for a true peace there has to be a comprehensive understanding of past events in order to forgive, the “Comisión de la verdad” (Truth commission) was created. This Commission did incredible work gathering testimonials of the war from all sides and making them accessible to the public. Remembering is essential to healing and moving on.

The signed peace agreement. Photo by FAOAmericas used under a CC BY-NC-SA 2.0 license

In the end, peace for this country has a lot to do with people, territory, and biodiversity. Areas that were previously unexplored due to violence are now accessible, and although war is far from over, this is a good path to follow. A long one, but, we hope, full of life.

Research article:

Romero-Ortiz C, Sarmiento CE, Harvey MS (2023) A new genus and five new species of pseudoscorpions (Arachnida, Pseudoscorpiones, Withiidae) from Colombia. ZooKeys 1184: 301-326. https://doi.org/10.3897/zookeys.1184.106698

Genetic study reveals that a captive-bred population could save endangered crocodile from extinction

Since this species is almost extinct in the wild, the news brings hope for the recovery of populations.

The Orinoco crocodile (Crocodylus intermedius) is a critically endangered species native to the Orinoco River basin in Colombia and Venezuela. It is one of the largest crocodilian species in the world, reaching lengths of up to seven meters. Despite its impressive size, it is also the most endangered and least-studied of the New World crocodilians.

Female Orinoco crocodile from the Roberto Franco Tropical Biological Station´s ex-situ population.

The species has faced a severe population decline due to commercial overexploitation of its skin, which was highly sought after by the fashion industry of Europe, the USA and Japan in the 20th century. As a result, the current estimated global population stands at less than 250 adult individuals.

Recognizing the critical status of the species, herpetologist Federico Medem established a captive breeding program for the Orinoco crocodile in 1971 at the Roberto Franco Tropical Biological Station (RFTBS) in Villavicencio. Currently, the RFTBS houses over 600 individuals, making it the largest stock of this species and the only one in Colombia. Remarkably, there might be more adult crocodiles kept there than in the wild. 

Despite the success of the captive breeding program, reintroduction of animals into the wild has been challenging. This is primarily due to the lack of a comprehensive genetic characterization that can determine whether the population is genetically viable and has no signs of inbreeding, which can result in reduced fitness at the individual and population level. To ensure the successful reintroduction of the species, it was crucial to have a robust and conclusive genetic assessment that confirms the population’s genetic health and viability.

“We felt a sense of urgency to determine the genetic viability of the population in order to proceed with the reintroduction of animals and establish new populations of the species in Colombia. Therefore, we conducted a comprehensive genetic characterization using fast-evolving molecular markers on a sample of 551 crocodiles,” explains Ana María Saldarriaga, a former researcher at the Universidad Nacional de Colombia who is currently pursuing a Ph.D. at Fordham University.

Female Orinoco crocodile from the Roberto Franco Tropical Biological Station´s ex-situ population.

“Our findings showed that the individuals within the population possess sufficient genetic diversity and are suitable for reintroduction efforts, as well as for maintaining and enhancing the genetic variability of the ex-situ population.”

“We demonstrated that molecular data could be used to improve the management of ex-situ conservation programs well beyond what could be achieved with pedigree information alone,” she and her colleagues write in a study just published in the journal Nature Conservation.

Female Orinoco crocodile from the Roberto Franco Tropical Biological Station´s ex-situ population.

Based on the findings of this study, the Colombian government, along with other public and private conservation institutions and agencies, can use the individuals identified in this research to initiate the establishment of new populations in regions where the species has been completely depleted.

Female Orinoco crocodile from the Roberto Franco Tropical Biological Station´s ex-situ population.

“Today, it is widely recognized that top predators, such as crocodiles, play fundamental roles in both aquatic and terrestrial ecosystems. They have a significant impact on the nutrient cycle, regulate fish populations, and contribute to important cross-ecosystem engineering processes,” stated Mario Vargas-Ramírez, professor at the Genetics Institute of the Universidad Nacional de Colombia and director of the RFTBS.

“Therefore, the reintroduction of the Orinoco crocodile to the Orinoco region is an urgent priority. Additionally, as the Orinoco crocodile is considered an umbrella species, its recovery and conservation efforts will have a positive cascading effect, protecting a large number of species that coexist in the same environment.” 

Research article:

Saldarriaga-Gómez AM, Ardila-Robayo MC, Medem F, Vargas-Ramírez M (2023) Hope is the last thing lost: Colombian captive-bred population of the critically endangered Orinoco crocodile (Crocodylus intermedius) is a genetic reservoir that could help to save the species from extinction. Nature Conservation 53: 85-103. https://doi.org/10.3897/natureconservation.53.104000

Photos by Mario Vargas-Ramírez.

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Expedition uncovers four new tarantula species in Colombian biodiversity hotspot

This groundbreaking research expands our understanding of the region’s Mygalomorphae species.

The Colombian Pacific region, nestled within the heart of the Chocó Biogeographic Region, has unveiled some of its remarkable biological wonders. Recognized as one of the world’s most enigmatic biodiversity hotspots, this area has remained largely unexplored, particularly when it comes to spider diversity. A groundbreaking biological expedition, conducted at the Jardín Botánico del Pacífico (JBP) in Bahía Solano, has revealed some taxonomic novelties that are set to redefine our understanding of this captivating ecosystem. The area not only serves as a tourist attraction but also plays a pivotal role in the conservation of the tropical rainforests and mangroves in the region.

Led by a team of dedicated researchers, the study focused on Mygalomorphae spiders, aiming to shed light on their intricate world. This enigmatic spider group includes tarantulas, trapdoor spiders, funnel-web spiders, millimeter-sized spiders with little use of the silk, and bald-legged spiders with the ability to attach substrate to their bodies. They are predatory, mostly terrestrial, and very often have restricted geographic distributions and high levels of endemism.

In this first-of-its-kind exploration of the Colombian Pacific rainforest, the team discovered and documented four remarkable spider species. One of them is Ummidia solana, an exceptional trapdoor spider. Additionally, the researchers identified three species of tarantulas: Euthycaelus cunampia, Neischnocolus mecana, and Melloina pacifica.

A female Neischnocolus mecana.

“These taxonomic breakthroughs represent the first recorded instances of their respective genera in the region, expanding their geographical distribution. Each species was meticulously illustrated, described, and scientifically discussed, offering valuable insights into their morphological characteristics, taxonomy, and biogeography. The results of this study serve as a significant contribution to our understanding of the region’s biological diversity, known for its exceptional species richness and endemism,” say the researchers.

A male Ummidia solana.

Let us delve deeper into the newfound species. Ummidia solana, derived from the municipality of Bahía Solano, captures the essence of the stunning Colombian Pacific coast, with its mesmerizing landscapes and abundant vegetation. This discovery also marks the first record of the Ummidia genus within the Chocó Biogeographic Region.

Melloina pacifica, named after the Colombian Pacific region it inhabits, represents the first described species of the Melloina genus in Colombia. While Melloina is known to thrive in diverse ecosystems, including caves, this specific record expands the genus’ known distribution, previously documented solely in Venezuela and Panama.

A male Melloina pacifica.

Euthycaelus cunampia pays tribute to Don José and Don Antonio, members of the Emberá indigenous community from Mecaná, Chocó. Their transition from hunting traditions to becoming touristic and academic guides for the JBP inspired the species name. Notably, this discovery marks the first published record of the Euthycaelus genus and the subfamily Schismatothelinae outside the Andean Region and Eastern Cordillera for Colombia.

A male Euthycaelus cunampia.

Lastly, Neischnocolus mecana, named after a township in Bahía Solano, underscores the commitment of the Jardín Botánico del Pacífico community to conserve the region’s rich biodiversity. This is the fourth described species of the Neischnocolus genus in Colombia and represents its first record in the Chocó biogeographic region and the Colombian Pacific. Notably, this description expands the known geographic range of the genus.

“This groundbreaking study serves as a testament to the potential existence of undiscovered species and the need for comprehensive taxonomic research,” the scientists say in conclusion.

Research article

Echeverri M, Gómez Torres S, Pinel N, Perafán C (2023) Four new species of mygalomorph spiders (Araneae, Halonoproctidae and Theraphosidae) from the Colombian Pacific region (Bahía Solano, Chocó). ZooKeys 1166: 49–90. https://doi.org/10.3897/zookeys.1166.101069

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Two new tree species discovered in Colombia

Trees of the genus Otoba have small, foul-smelling flowers coloured in yellow or greenish yellow, and round, aromatic fruits. Toucans, monkeys, or small terrestrial animals sometimes feed on their fruits, while herbivorous insects have developed a taste for their leaves. Part of the nutmeg family, Otoba trees are widely distributed from Nicaragua to Brazil, with as many as nine species native to Colombia.

Fruits of Otoba from Osa Peninsula, Costa Rica. Photo by Reinaldo Aguilar

Despite this apparent abundance, though, scientific knowledge on their biology is very limited.

Thanks to researchers from the Louisiana State University and the Missouri Botanical Garden, we now know more about these interesting trees, as Daniel Santamaría-Aguilar and Laura P. Lagomarsino recently described two new species of Otoba in the open-access, peer-reviewed journal PhytoKeys.

Even though the COVID-19 pandemic meant limited access to physical specimens, the research team were able to identify the two new species while investigating herbaria samples. This discovery helps clear some taxonomic confusions in the genus, as both of these new species had often been mistaken for other Otoba members.

The newly described Otoba scottmorii and Otoba squamosa can be found in Colombia’s Antioquia department, growing in premontane and humid forests. Known from the premontane forests of Cordillera Occidental in Colombia, Otoba squamosa grows at 1330–1450 m, while Otoba scottmorii, locally known as Cuángare otobo, grows in the humid forests in the Department of Antioquia, northwestern Colombia.

Staminate flowers of Otoba from Osa Peninsula, Costa Rica. Photo by Reinaldo Aguilar

The scientific name scotmorii is a tribute to Dr. Scott A. Mori (1941–2020), “a wonderful person and skilled botanist; a dedicated explorer of Central and South America humid forests (where this species occurs), especially in the Guianas and the Amazon basin; and an authority on Neotropical Lecythidaceae,” who inspired and personally supported Daniel Santamaría-Aguilar in his botanical work.

Because their habitats are threatened by deforestation, both tree species are preliminarily assessed as Endangered according to the criteria of the International Union for Conservation of Nature.

Research article:

Santamaría-Aguilar D, Lagomarsino LP (2021) Two new species of Otoba (Myristicaceae) from Colombia. PhytoKeys 178: 147-170. https://doi.org/10.3897/phytokeys.178.64564

As uniform as cloned soldiers, new spiders were named after the Stormtroopers in Star Wars

One of the newly described bald-legged spider species Stormtropis muisca. It is also the highest altitudinal record for the family. Image by Carlos Perafan.

The new species are amongst the very first bald-legged spiders recorded in Colombia

Despite being widely distributed across north and central South America, bald-legged spiders had never been confirmed in Colombia until the recent study by the team of Drs Carlos Perafan and Fernando Perez-Miles (Universidad de la Republica, Uruguay) and William Galvis (Universidad Nacional de Colombia). Published in the open-access journal ZooKeys, their research paper describes a total of six previously unknown species inhabiting the country.

Four of the novel spiders were unable to fit into any already existing genus, so the scientists had to create a brand new one for them, which they called Stormtropis in reference to the Star Wars‘ clone trooper army known as Stormtroopers.

Considered to be amongst the most enigmatic in the group of mygalomorphs, the bald-legged spiders are a family of only 11 very similarly looking, small- to medium-sized species, whose placement in the Tree of Life has long been a matter of debate. In fact, it is due to their almost identical appearance and ability for camouflage that became the reason for the new bald-legged spider genus to be compared to the fictional clone troopers.

One of the most striking qualities of the bald-legged spiders (family Paratropididae) is their ability to adhere soil particles to their cuticle, which allows them to be camouflaged by the environment.

A bald-legged spider of the genus Paratropis in its natural habitat. Image by Carlos Perafan.

“The stormtroopers are the soldiers of the main ground force of the Galactic Empire. These soldiers are very similar to each other, with some capacity for camouflage, but with unskillful movements, like this new group of spiders,” explain the researchers.

“We wanted to make a play on words with the name of the known genus, Paratropis, and of course, we also wanted to pay tribute to one of the greatest sagas of all time”, they add.

One of the new ‘stormtrooper’ species (Stormtropis muisca) is also the highest altitudinal record for the family. It was recorded from an elevation of at least 3,400 m in the central Andes. However, the authors note that they have evidence of species living above 4,000 m. These results are to be published in future papers.

In the course of their fieldwork, the researchers also confirmed previous assumptions that the bald-legged spiders are well adapted to running across the ground’s surface. The spiders were seen to stick soil particles to their scaly backs as a means of camouflage against predators. More interestingly, however, the team records several cases of various bald-legged species burrowing into ravine walls or soil – a type of behaviour that had not been reported until then. Their suggestion is that it might be a secondary adaptation, so that the spiders could exploit additional habitats.

In conclusion, not only did the bald-legged spiders turn out to be present in Colombia, but they also seem to be pretty abundant there. Following the present study, three genera are currently known from the country (Anisaspis, Paratropis and Stormtropis).

A bald-legged spider (Paratropis elicioi) in its natural habitat. Image by Carlos Perafan.

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Original source:

Perafan C, Galvis W, Perez-Miles F (2019) The first Paratropididae (Araneae, Mygalomorphae) from Colombia: new genus, species and records. ZooKeys 830: 1-32. https://doi.org/10.3897/zookeys.830.31433

New termite species condemned to 100 years of solitude with a second chance

While the last species of the termite genus Proneotermes genus has been discovered more than a hundred years ago, now scientists have discovered a new and a third one. Part of the fauna living in the dry forests in Colombia, its name was inspired by the magic realism of the fictional town of “Macondo” from the novel ‘One hundred years of solitude’ by Nobel Prize laureate Gabriel García Marquez.

Termitologists Robin Casalla, Freiburg University, Germany, and Universidad del Norte, Colombia, Dr Rudolf H. Scheffrahn, University of Florida, USA, and Prof Dr Judith Korb, Freiburg University, discovered a termite species and described it as new based on its unique shapes and colors, as well as its genes. The new termite is published in the open access journal ZooKeys.

Furthermore, there is a story behind the name of this new species, called Proneotermes macondianus. “Macondianus” refers to the fictional town of “Macondo” in the novel ‘One hundred year of solitude’ written by Nobel Prize laureate Gabriel García Marquez. Macondo stands for a forgotten microcosm in the history of Colombia with unimaginable events. According to the story, the magical realm was eventually wiped off the map by gigantic storms of the Caribbean as a form of divine punishment to the violation of the biblical laws of genetics, incest.

“P. macondianus may have been one of those characters playing in the novel during the destruction of Macondo, remaining unrecognized until today,” comments lead author Robin Casalla.

In Colombia many species still await their discovery, either in the wild, or frozen in time in museum cabinets and lacking a name. The only way to refer to them, is by pointing to them with your finger. But now, P. macondianus has been described in ZooKeys.

The soldiers of this species have a characteristic elongated, rectangular heads, about 5 – 7 mm long, ranging in color from black (at the tip) to ferruginous orange (at the back). P. macondianus has a voracious appetite for drywood, especially thin branches of less than 2 cm in diameter, and lives in small colonies of about 20 individuals. Although few drywood termites are considered pests in some urban areas, P. macondianus lives only in the wild and prefers tropical dry forests.

The termite P. macondianus ‘sentenced’ to over a hundred years of ‘solitude’, has now been given a second chance to not be forgotten again, being recognized as part of the Colombian natural ecosystem.

 

Original source:

Casalla R, Scheffrahn RH, Korb J (2016) Proneotermes macondianus, a new drywood termite from Colombia and expanded distribution of Proneotermes in the Neotropics (Isoptera, Kalotermitidae). ZooKeys 623: 43-60. doi: 10.3897/zookeys.623.9677

Orchid or Demon: Flower of a new species of orchid looks like a devil’s head

A lone and unique population of about 30 reddish to dark violet-maroon orchids grows on the small patch of land between the borders of two Colombian departments. However, its extremely small habitat is far from the only striking thing about the new species.

A closer look at its flowers’ heart reveals what appears to be a devil’s head. Named after its demonic patterns, the new orchid species, Telipogon diabolicus, is described in the open access journal PhytoKeys.

Discovered by Dr Marta Kolanowska and Prof Dariusz Szlachetko, both affiliated with University of Gdansk, Poland, together with Dr Ramiro Medina Trejo, Colombia, the new orchid grows a stem measuring between 5.5 – 9 cm in height.

With its only known habitat restricted to a single population spread across a dwarf montane forest at the border between departments Putumayo and Nariño, southern Colombia, the devilish orchid is assigned as a Critically Endangered species in the IUCN Red List.

Although the curious orchid could be mistakenly taken for a few other species, there are still some easy to see physical traits that make the flower stand out. Apart from the demon’s head hidden at the heart of its colours, the petals themselves are characteristically clawed. This feature has not been found in any other Colombian species of the genus.close-up

“In the most recent catalogue of Colombian plants almost 3600 orchid species representing nearly 250 genera are included,” remind the authors. “However, there is no doubt that hundreds of species occurring in this country remain undiscovered. Only in 2015 over 20 novelties were published based on material collected in Colombia.”

Original source:

Kolanowska M, Szlachetko DL, Trejo RM (2016) Telipogon diabolicus (Orchidaceae, Oncidiinae), a new species from southern Colombia. PhytoKeys 65: 113-124. doi:10.3897/phytokeys.65.8674

A hair’s breadth away: New tarantula species and genus honors Gabriel García Márquez

With its extraordinary defensive hairs, a Colombian tarantula proved itself as not only a new species, but also a new genus. It is hypothesised that the new spider is the first in its subfamily to use its stinging hairs in direct attack instead of ‘kicking’ them into the enemy.

Described in the open access journal ZooKeys by an international research team, led by Carlos Perafán, University of the Republic, Uruguay, the name of the new spider genus honours an indigenous people from the Caribbean coast region, whose language and culture are, unfortunately, at serious risk of extinction. Meanwhile, its species’ name pays tribute to renowned Colombian author and Nobel laureate for his novel ‘One Hundred Years of Solitude’ Gabriel García Márquez.male kankuamo

The new tarantula, formally called Kankuamo marquezi, was discovered in Sierra Nevada de Santa Marta, Colombia. When examined, the arachnid showed something extraordinary about its defensive hairs and its genitalia. The hairs were noted to form a small oval patch of lance-shaped barbs, hypothesised by the scientists to have evolved to defend their owners by direct contact.

On the other hand, when defending against their aggressors, the rest of the tarantulas in this subfamily need to first face the offender and then vigorously rub their hind legs against their stomachs. Aimed and shot at the enemy, a ball of stinging hairs can cause fatal injuries to small mammals when landed into their mucous membrane (the layer that covers the cavities and shrouds the internal organs in the body). Once thrown, the hairs leave a bald spot on the tarantula’s belly.

“This new finding is a great contribution to the knowledge of the arachnids in Colombia and a sign of how much remains to be discovered,” point out he authors.

Figure 8“The morphological characteristics present on Kankuamo marquezi open the discussion about the phylogenetics relationship between subfamilies of Theraphosidae tarantulas and the evolutionary pressures that gave rise to the urticating hairs.”

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Original source:

Perafán C, Galvis W, Gutiérrez M, Pérez-Miles F (2016) Kankuamo, a new theraphosid genus from Colombia (Araneae, Mygalomorphae), with a new type of urticating setae and divergent male genitalia. ZooKeys 601: 89-109. doi: 10.3897/zookeys.601.7704