Cornuroncus Nassirkhani, Zaragoza & Mumladze, 2019

Nassirkhani, Mahrad, Zaragoza, Juan A. & Mumladze, Levan, 2019, A new pseudoscorpion genus from western Georgia (Pseudoscorpiones: Neobisiidae: Cornuroncus n. gen.), with a key to all Neobisiinae genera, Zootaxa 4624 (2), pp. 289-295 : 290-291

Cornuroncus Nassirkhani, Zaragoza & Mumladze n. gen.

Diagnosis. Cornuroncus can be distinguished from all other genera of the subfamily Neobisiinae by the following combination of characters: rallum with 7–8 denticulate blades that increase in length from proximal to distal and are located on a low hyaline base, the lack of processes on the chelal hand, chelal fingers without accessory teeth, trichobothrium t positioned distinctly distal to st, presence of a short dorso-distal spine on tarsus IV, and leg IV with an accessory tooth in ventral position on one of the claws.

Type species. Cornuroncus chavchavadzei Nassirkhani, Zaragoza & Mumladze n. sp.

Etymology. The generic name refers to the presence of a horn-like projection on the dorso-distal surface of tarsus IV, and the strong resemblance to Roncus ( Cornuroncus , cornu + Roncus, Latin , cornu means “horn-shaped”).

Description. Carapace sub-quadrate, entirely smooth, with a distinct triangular epistome and one pair of eyes, posterior transverse furrow more or less visible. Tergites and sternites undivided and with smooth cuticle; sternites III–XI with marginal setae, without discal setae in both sexes, except in sternites II–III of males. Chaetotaxy of genital area: anterior genital operculum with 8–9 and posterior operculum with 12–14 short setae in females; anterior and posterior opercula with 31 setae in males. Pleural membrane granulate. Cheliceral rallum comprising one row of 7–8 denticulate blades on a low hyaline base, most proximal blade shortest. Pedipalp robust, dorsal face of trochanter without spiniform setae, trichobothria eb, esb, ib, and isb located at base of fixed chelal finger, trichobothrium ist situated proximal to middle of the finger. Tarsus IV with a short dorso-distal spine. One of the claws of leg IV with a ventral accessory tooth, the other claw smooth and without processes ( Figs 14–16 ).

Figures

FIGURES 2–17. Cornuroncus chavchavadzei n. sp., holotype ♀: 2–3, 6–15, 17, paratype ♂: 4–5, 16: 2. carapace, dorsal view; 3. coxae IV and sternites II–IV, ventral view; 4. sternites II–III, ventral view; 5. internal genitalia, in part; 6. left chelicera, dorsal view; 7. rallum; 8. left pedipalp, dorsal view; 9. right chelal hand, prolateral view; 10. right chela, retrolateral view; 11. right coxa I, ventral view; 12. Sub-terminal seta, magnified; 13. right leg I (trochanter omitted), retrolateral view; 14. right leg IV, retrolateral view (trochanter omitted); 15. distal part of tarsus of left leg IV, prolateral view; 16. distal part of tarsus of right leg IV, retrolateral view; 17. distal part of tarsus of right leg IV, retrolateral view (microscopic picture). See Material and methods for abbreviations.