A new pseudoscorpion genus from western Georgia (Pseudoscorpiones: Neobisiidae: Cornuroncus n. gen.), with a key to all Neobisiinae genera Author Nassirkhani, Mahrad Author Zaragoza, Juan A. Author Mumladze, Levan text Zootaxa 2019 2019-06-28 4624 2 289 295 journal article 26366 10.11646/zootaxa.4624.2.12 e3522865-dc15-4cb0-8496-e371a9544bac 1175-5326 3259234 7AD1D89D-6DB7-4EE9-9012-17698855A884 Cornuroncus chavchavadzei n. sp. ( Figs 2–17 ) Material examined . Holotype ♀ , GEORGIA : Samegrelo-Zemo Svaneti region , 7 km north-east from the village Kurzu long near Tekhuri River , 42°36′ N 42°20′ E, 450 m ; 20 July 2014 ; L. Mumladze leg. ISUPS2 H ; Paratypes : 2♀ , 1♂ same data and repository as holotype ( ISUPS2 P1 – ISUPS2 P2 – ISUPS2 P3) . Etymology . This species is named in honor of Ilia Chavchavadze ( 1837–1907 ), who was the leader of the National Liberation Movement of Georgia . Description . Female adults including holotype ; male, when different, in square brackets. Carapace ( Fig. 2 ): brown, anterior half distinctly lighter in colour than posterior half; posterior border partially not sclerotized and pale; entirely smooth; slightly wider than long, widest at the middle, 0.88–0.95x longer than broad; with one pair of small eyes, lenses not flattened but lightly convexe, distance from anterior margin 0.087 –0.093 mm , diameter of eyes 0.062 –0.067 mm [ 0.050 mm ]; with 24–26 setae, anterior margin with 4 and posterior margin with 6 setae, chaetotaxy: 4:8:6–8:6; a low posterior transverse furrow more or less distinct; epistome prominent but small, triangle-shaped and tip slightly rounded (length 0.017 –0.020 mm , width 0.025 –0.027 mm ); glandular pores present, 3 on each side of ocular area; anterolateral corners without protuberances; with 5 lyrifissures, one pair situated in ocular zone and close to the eyes, one located in median zone, distal to posterior margin, and one pair located at the posterior margin. Tergites: light brown with yellowish brown borders; without median suture line; slightly sclerotized; X with 4 tactile setae, lateral setae slightly shorter than lateromedian setae; chaetotaxy: 6:7–9:9–10:9–10:10–11:11:11:11:10– 11:1T1T1T1T1:T1T1T1T:2 [6:5:9:9:11:11:11:11:9:1T1T1T1T1:T1T1T1T:2]. Sternites: lighter in colour than tergites, III–IV ( Fig. 3 ) not uniformly coloured; entirely smooth; without median suture line; slightly sclerotized; in females, anterior genital operculum with 8–9 tiny microsetae mostly arranged in median zone, posterior operculum with 12–14 short setae in one row at posterior margin; in male, anterior and posterior opercula with 31 setae, 16 setae located around genital aperture ( Fig. 4 ); cribriform plate of females extended from one side to the other side of sternite II along genital aperture; male genitalia damaged during mounting and not clearly visible, lateral genital sacs longer than median genital sac, genital opening with 3+3 internal setae ( Fig. 5 ); chaetotaxy: 8–9:(3)12–14(3):(2–3)11–12(2):14:15:12–14:12:13–14:4T1T4–5T1T4:1T1T1–T2T:2 [3 microsetae on each stigmata of sternites III and IV, chaetotaxy IV–XII: 11:14:13:13:13:14:4T1T4:T1T:2]. Pleural membrane: granulate. Chelicera: brown; hand with 6 acuminate setae; galea knob-shaped and with a distinct hyaline convexity in both sexes; subgaleal seta situated distal to middle (0.61–0.66), proximal to large median tooth; hand entirely smooth; fixed finger with 19–20 minute teeth reaching to base; movable finger with 11–13 teeth reaching to middle of the segment, median tooth distinctly larger than others ( Fig. 7 ); serrula interior with 15–18 and serrula exterior with 21–26 blades; rallum with 7–8 denticulate blades on a low hyaline base, most proximal blade shortest ( Fig. 7 ). Pedipalps: reddish brown, chela slightly darker in colour than femur and patella; trochanter and patella entirely smooth, prolateral surface of distal half of femur finely granulated, prolateral surface of chelal hand distinctly granulated at base of fixed finger ( Figs 8–9 ); coxa including manducatory process with 10–11 setae, manducatory process with 4 acuminate setae, seta located at base of manducatory process longest; trochanter with dorsal tubercle, L/ W 1.81 –1.91 [1.95]; femur with a short pedicel, one tubercle located medially at the retrolateral margin, one glandular pore located dorso-distally and another located ventro-distally; some long setae without enlarged alveoli located in basal half of the segment ( Fig. 8 ), L/ W 3.32 –3.40 [3.40]; patella with short and stout pedicel, L = 0.18–0.19 mm ; patella distinctly shorter than femur, with 3 lyrifissures situated basally and one lyrifissure more distally, one glandular pore located dorso-distally, L/ W 1.90 –2.07 [1.96]. Chela with pedicel L/ W 2.56 –2.73 [2.74], without pedicel 2.27– 2.54 [2.48]; movable finger slightly shorter than hand with pedicel and slightly longer than hand without pedicel; hand with pedicel 1.12–1.16x [1.07x] longer than movable finger; movable finger 1.05–1.13x [1.11x] longer than hand without pedicel; hand with pedicel L/ W 1.53 –1.59 [1.59]; 4–5 microsetae located distal to trichobothria eb -esb [3] ( Fig. 10 ); microsetae below trichobothria eb -esb absent; fixed finger with 3 lyrifissures: one ( fb ) located at same level as ib , one ( fa ) close to base in retrolateral view and one ( fd ) at same level of et in dorsal view; movable finger with 3 lyrifissures in retrolateral view: one ( ma 2 ) located at same level as trichobothrium b , one ( ma 1 ) between b and sb , and one ( ma 3 ) slightly distal to sb ; one sensillum ( se ) located distal and very close to sb ; fixed finger with 46–47 contiguous teeth, 4–5 distal teeth triangular in shape and the others rounded, reaching proximal of trichobothrium isb , all teeth with dental canal; movable finger with 46–49 contiguous rounded teeth slightly reduced in size from tip of the finger to its base, not reaching to the level of trichobothrium b , all teeth with dental canal; nodus ramosus of venom duct in fixed chelal finger short and situated distinctly distal to et . Trichobothriotaxy: fixed finger with 8 and movable finger with 4 trichobothria ( Fig. 10 ); fixed finger with trichobothrium it located approximately midway between et and est , all three distal of the middle of finger, ist situated proximal to middle of the finger (0.39–0.40) and midway between it and ib , isb on retrolateral face, ib situated basally, eb and esb located slightly proximad to ib ; movable finger with trichobothrium st situated distinctly closer to t than to sb , trichobothrium sb midway between b and st , distance sb - st distinctly longer than distance st -t . Legs: light brown, smooth; coxa I with short, triangular, sclerotized and pointed anterolateral process, medial process not produced, mediolateral face with rounded membranous layer ( Fig. 11 ); coxal chaetotaxy: 4–5:4–6:4:7– 8; sub-terminal setae bifid, both branches distinctly denticulate ( Fig. 12 ); claws of legs I–III symmetric; claws of leg IV ventrally asymmetric either with one small accessory tooth, the other smooth; arolia simple and shorter than claws. Leg I ( Fig. 13 ): femur L/D 2.33–2.57 [2.28]; patella L/D 2.27–2.45 [2.60]; femur 1.33–1.40x [1.23x] longer than patella; tibia L/D 3.55–3.66 [3.33]; metatarsus L/D 2.28–2.42 [2.50]; tarsus L/D 4.00–4.17 [3.83]; tarsus 1.47–1.56x [1.53x] longer than metatarsus. Leg IV ( Fig. 14 ): femur L/D 1.20 [1.19]; patella L/D 1.33–1.48 [1.48]; femur + patella L/D 2.08-2.72 [2.61]; tibia with a long tactile seta situated distal to middle (T=0.58–0.61), L/D 4.38–4.42 [4.38]; metatarsus with a long tactile seta situated basally (T=0.19–0.23), L/D 2.44–2.62 [2.55]; tarsus with a tactile seta situated proximal to middle (T=0.33–0.37), with a short dorso-distal spine ( Figs 15–17 ), L/D 4.00–4.57 [4.00]. 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. Measurements (mm) : holotype ♀ , body length: 2.50. Carapace: 0.75/0.85. Pedipalp: trochanter 0.42/0.22; fe- mur 0.70/0.22; patella 0.60/0.29; chela (with pedicel) 1.20/0.44; chela (without pedicel) 1.12; hand (with pedicel) L. 0.70; hand (without pedicel) 0.62; movable finger L. 0.62. Leg I: femur 0.35/0.15; patella 0.25/0.11; tibia 0.32/0.09; metatarsus 0.16/0.07; tarsus 0.25/0.06. Leg IV: femur 0.30/0.25; patella 0.32/0.24; femur + patella 0.52; tibia 0.53/0.12; metatarsus 0.21/0.08; tarsus 0.30/0.07. Paratypes ♀ , body length: 2.73–2.80. Carapace:0.76/0.80.Pedipalp:trochanter 0.40–0.42/0.22; femur 0.73/0.22; patella 0.55/0.29; chela (with pedicel) 1.15/0.45; chela (without pedicel) 1.02; hand (with pedicel) L.0.69–0.70; hand (without pedicel) 0.56–0.60; movable finger L. 0.59. Leg I: femur 0.36/0.14; patella 0.27/0.11; tibia 0.32– 0.33/0.09; metatarsus 0.17/0.07; tarsus 0.24/0.06. Leg IV: femur 0.31/0.25; patella 0.37/0.25; femur + patella 0.68; tibia 0.57/0.13; metatarsus 0.22–0.23/0.09; tarsus 0.32/0.07–0.8. Paratype ♂ , body length: 2.55. Carapace: 0.71/0.77. Pedipalp: trochanter 0.41/0.21; femur 0.68/0.20; patella 0.55/0.28; chela (with pedicel) 1.07/0.39; chela (without pedicel) 0.97; hand (with pedicel) L.0.62; hand (without pedicel) 0.52; movable finger L. 0.58. Leg I: femur 0.32/0.14; patella 0.26/0.10; tibia 0.30/0.09; metatarsus 0.15/0.06; tarsus 0.23/0.06. Leg IV: femur 0.31/0.26; patella 0.37/0.25; femur + patella 0.68; tibia 0.57/0.13; metatarsus 0.23/0.09; tarsus 0.32/0.08.