Saturday, July 2, 2016

[Arachnida • 2016] Charinus taboa • A New Troglomorphic Species of Charinus Simon, 1892 (Amblypygi, Charinidae) from eastern Brazil

Charinus taboa  
Vasconcelos, Giupponi & Ferreira, 2016

Charinus taboa sp. n. comprises the twenty-second species of the genus described for Brazil. The new species belongs to the eastern Brazilian group, in which all species have sucker-like gonopods. Charinus taboa sp. n. has a marked sexual dimorphism in the pedipalps as do other members of the genus in the country. The description of Charinus taboa sp. n. offers an opportunity to discuss some aspects of ecology, troglomorphism and conservation within the genus. A key to the eastern Brazilian species of Charinus is provided.

Keywords: Neotropics, subterranean species, taxonomy, whip spider

Figures 18–19. Charinus taboa sp. n. 18 Male inside the Taboa cave 19 Female preying a moth (Noctuidae).

Charinus taboa differs from other species of the genus by the following combination of characteristics: frontal process with thickened apex; median eyes reduced, with flattened tubercle; lateral eyes not developed and without pigmentation (little pigmentation in smaller individuals); tritosternum with a slightly forked apex; pedipalps sexually dimorphic; femur of the pedipalp with 4-5 dorsal spines (typically 5) and 5-6 ventral spines (typically 5); patella of the pedipalp with 6-7 dorsal spines (typically 6) and 4 ventral spines; distitibia of the leg IV with 16 trichobothria; female gonopod sucker-like, with irregular opening and edges with a small fold; male gonopod with pairs of Pi and LoL1 emerging from each side of the Fi with thin prolongations, and pairs of LoD and LoL2 claw-shaped emerging from the interior of the upper portion of Fi.

EtymologyThe specific epithet is treated as a noun in apposition and refers to the name of the cave (Taboa) where most of the specimens were collected.

DistributionThe new species is known from the Taboa and BR 24 caves, state of Minas Gerais, Brazil.

Figures 18–19. Charinus taboa sp. n. 18 Male inside the Taboa cave 19 Female preying a moth (Noctuidae). 
Figure 20–23. 20 Locality of Sete Lagoas (municipality where are located the Taboa and BR 24 caves) in the state of Minas Gerais, Brazil. The blue area corresponds to the Bambui limestone group and the red area correspond to the Sete Lagoas municipality 21 Location of the Taboa cave (the arrow indicates the main entrance of Taboa cave and the circle the location where individuals of C. taboa were found) and BR-24 cave (star represents the entrance) 22 Portion of the Taboa cave where specimens were collected 23 Portion of the Taboa cave with a watercourse where most of the specimens were found.

Ana Caroline Oliveira Vasconcelos, Alessandro Ponce de Leão Giupponi and Rodrigo Lopes Ferreira. 2016. Description of A New Troglomorphic Species of Charinus Simon, 1892 from Brazil (Arachnida, Amblypygi, Charinidae). ZooKeys. 600: 35-52. DOI:  10.3897/zookeys.600.8580