Petterchernes brasiliensis Heurtault, 1986

Bedoya-Roqueme, Edwin, Tizo-Pedroso, Everton, Barbier, Eder & Lira, André Felipe De Araújo, 2023, Two new cave-dwelling pseudoscorpion species (Arachnida: Pseudoscorpiones) from Northeastern Brazil, Zootaxa 5293 (2), pp. 317-332 : 321

Petterchernes brasiliensis Heurtault, 1986

Material examined. 1 male, Pernambuco, Brazil: Furna do Morcego cave , 8°34’14.1”S; 37°22’55.6”W, 556 m a.s.l., 09-V-2019; Catimbau National Park, E. Barbier leg. ( LECA; Ps-SCR011) .

Diagnosis. According to Heurtault (1986) and Mahnert (1994) the males of Petterchernes brasiliensis Heurtault, 1986 can be easily distinguished by the carapace without eyes and without eyespots, dark brown, metazone finely granulated, setae of the carapace and tergites strongly clavate, with two deep transverse furrows, for setae on anterior margin; tergites divided, granulate. Chaetotaxy tergal: 9: 9: 9: 10: 10: 10: 12: 12: 10: 10: 10: 2. Genital region operculum with 32 setae and ten setae on posterior margin. Chelicerae, galea with multiple branches, and three blades in the rallum. Pedipalps coarsely granulate, setae stout and enlarged, trochanter 1.67×, with high dorsal hump, femur 2.22×, abruptly enlarged, patella 2.15×, chela with pedicel 2.28×, chela without pedicel 2.09×, trichobothrium isb, ib, and est at same level, hand with well pronounced internal hump bearing some longer and stouter setae. Legs, tarsus IV without tactile setae, claws smooth and simple, subterminal seta smooth, curve.

Measurements (mm). Body length: 1.251. Carapace: 0.554 / 0.473. Pedipalps: trochanter: 0.269 / 0.161, femur: 0.477 / 0.214, patella: 0.415 / 0.193, chela with pedicel: 0.766 / 0.335, chela without pedicel: 0.7020 / 0.335, movable finger: 0.418. Leg I: trochanter: 0.137 / 0.085, femur: 0.131 / 0.115, patella: 0.106 / 0.076, tibia: 0.127 / 0.078, tarsus: 0.202 / 0.047. Leg IV: trochanter: 0.153 / 0.121, femur+patella: 0.380 / 0.121, tibia: 0.164 / 0.086, tarsus: 0.276 / 0.058.

Distribution. Brazil ( Harvey 2013; World Pseudoscorpiones Catalog 2022 ).