Research Article |
Corresponding author: Caroline Sayuri Fukushima ( caroline.fukushima@helsinki.fi ) Academic editor: Chris Hamilton
© 2020 Caroline Sayuri Fukushima, Pedro Cardoso, Rogério Bertani.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Fukushima CS, Cardoso P, Bertani R (2020) Description of the male of the Critically Endangered tarantula Typhochlaena curumim Bertani, 2012 (Araneae, Theraphosidae), with comments on tarantula trade and conservation. ZooKeys 938: 125-136. https://doi.org/10.3897/zookeys.938.51442
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The genus Typhochlaena C.L. Koch, 1850 consists of five small size arboreal tarantula species with remarkable colored abdominal patterns and a very restricted geographic range in Brazil. Here, we describe the male of Typhochlaena curumim Bertani, 2012, which was collected in an area of Brazilian Atlantic Rainforest. The new record extends the northern limit of the geographic range for both the genus and species. As Typhochlaena spp. are now especially popular and requested in the pet market, and because T. curumim is classified as Critically Endangered, we discuss the impacts of the international trade and other challenges on conservation of the genus.
Aviculariinae, Brazilian Atlantic Rainforest, CITES, Mygalomorphae, pet trade, trafficking
The genus Typhochlaena C.L. Koch, 1850 was erected 170 years ago (
Typhochlaena curumim is a species known from only three female specimens that were found under loose bark in an area of Atlantic Rainforest in the state of Paraíba, Brazil. Recently, males of the species were collected during arachnological expeditions in the state of Rio Grande do Norte, Brazil, and the aim of this paper is, therefore, to describe the previously unknown male of T. curumim and discuss problems of conservation as they relate to this genus.
Specimens were deposited at the Museu Nacional, Rio de Janeiro (
The general format of the description is based on
Males of T. curumim resemble those of T. seladonia by having a long embolus, two or more times the tegulum length. Males of T. curumim differ from males of T. seladonia by the presence of shorter and broader embolus (≤ 2.5× length of tegulum in T. curumim versus > 3.5× in T. seladonia; 0.24 mm basal embolus width in T. curumim versus 0.1 mm in T. seladonia). They also differ by the brownish carapace and legs and abdomen dorsum with a black longitudinal stripe and lateral spots (Figs
Brazil, state of Rio Grande do Norte, locality data redacted: 1 male, S. N. Migliore leg., 19 April 2014, 19h58, over a bush leaf in a trail, ref. S90 (
Male.
Fovea : slightly procurved, shallow, 0.66 wide.
Eyes : eye tubercle 0.88 high, 0.81 long, 1.48 wide. Clypeus absent. Anterior row of eyes procurve. Posterior row of eyes slightly recurve. Eye sizes and interdistances: AME 0.35, ALE 0.35, PME 0.23, PLE 0.28, AME–AME 0.20, AME–ALE 0.19, AME–PME 0.05, ALE–ALE 0.20, ALE–PME 0.29, PME–PME 0.83, PME–PLE 0.05, PLE–PLE 1.11, ALE–PLE 0.2, AME–PLE 0.26.
Maxilla : 2.29 longer than wide. Cuspules: 28 spread over ventral inner heel.
Labium : 0.60 long, 1.04 wide, with 50 cuspules spaced by one diameter of each other on the anterior half. Labio-sternal groove shallow and flattened, with two slightly separate, large sigilla.
Chelicera : rastellum absent, basal segment with seven teeth and some small teeth on promargin.
Sternum : 2.45 long, 2.40 wide. Sigilla: three pairs, posterior and median rounded, less than one diameter from margin; anterior not visible.
Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 6.79, 3.22, 5.48, 4.43, 2.55, 22.47. II: 6.31, 3.02, 4.74, 4.54, 2.32, 20.93. III: 5.26, 2.55, 4.23, 3.80, 2.22, 18.06. IV: 6.62, 2.64, 4.80, 5.14, 1.97, 21.22. Palp: 3.24, 1.80, 2.97, ―, 1.09, 9.10. Midwidths: femora I–IV = 1.27, 1.18, 1.16, 1.02, palp = 0.82; patellae I–IV = 1.20, 0.98, 1.00, 1.05, palp = 0.84; tibiae I–IV = 0.75, 0.90, 0.84, 0.72, palp = 0.83; metatarsi I–IV = 0.63, 0.71, 0.77, 0.54; tarsi I–IV = 0.91, 0.73, 0.73, 0.54, palp = 1.05. Formula: I IV II III. Length leg IV to leg I: 0.94. Clavate trichobothria: two rows on distal 1/2 of tarsi I–IV. Scopula: Tarsi I–IV fully scopulate, IV divided by a wide band of setae. Metatarsi I–II on distal 2/3; III on distal 1/3; IV on distal 1/4. IV divided by setae. Scopula hairs longest at lateral areas of tarsi and metatarsi, giving spatulate aspect to articles. Spines absent on all legs and palps.
Urticating setae
: type II (0.56–0.59 long) on the abdomen dorsum (Fig.
Palp
(Figs
Tibial apophysis : absent. Metatarsus I straight.
Color pattern
(Figs
In Brazil in the states of Rio Grande do Norte and Ceará (new records), and Paraíba (
There are no drastic ontogenetic changes of color pattern. Males have reduced lateral black stripes when compared to females and immatures.
Males from a more northerly site in Rio Grande do Norte (approximately at 6.02°S, 35.2°W) were resting on a leaf in a bush near a trail during the night, or high in a tree, walking on branches during the day. Males from a southern site in Rio Grande do Norte (approximately at 6.46°S, 35.0°W) were also found to be active at night in trees; one individual was seen at breast height and another at less than 2 m above the ground.
As in other genera of Aviculariinae, Typhochlaena species have a very restricted geographic range, with no overlap in the distribution among species (
Although two other aviculariine species, Iridopelma hirsutum Pocock, 1901 and Pachistopelma rufonigrum Pocock, 1901, have similar distributions to T. curumim, T. curumim is probably more affected by habitat loss, given its rarity (
Considering the whole genus as of 2012, only 40 specimens are deposited in zoological collections (
The international pet trade is an important driver of biodiversity loss (
Typhochlaena curumim, along with T. seladonia, was included in the Brazilian Red List of Threatened Species (
There are several difficulties in assessing the risk of extinction of invertebrates, mainly due to the scarcity of data on distribution and population size (
Despite the Brazilian Red List having no status of law, a species’ presence on the list increases the penalties for environmental crimes in Brazil by at least tenfold (
We thank ICMBio for allowing us to perform collecting activities. We thank Willianilson Pessoa, Serena Migliore, Alessandro Giupponi, Katie C.T. Riciluca, Nicolas M. Gonçalves, Nícholas Aires, and Caio Costa for helping in fieldwork. We thank Marco A. Freitas for assistance with Brazilian environmental legislation and the curators Adriano Kury (