Bisetocreagris wangi, Guo, Wang & Fe. Zhang, 2018

Guo, Xiangbo, Wang, Weitong & Zhang, Feng, 2018, Description Of Three New Bisetocreagris Species (Pseudoscorpiones: Neobisiidae) From Southern China, Acta Zoologica Academiae Scientiarum Hungaricae 64 (3), pp. 227-242 : 232-236

Bisetocreagris wangi sp. n.

( Figs 4–6)

Type material. Holotype male (Ps.- MHBU-GZ13100501 ), China: Guizhou Province, Songtao County, Wuluo Town (28°01’N, 108°45’E), alt. 1239 m, 5 October 2013, Luyu Wang leg. Paratypes: four males and three females (Ps.-MHBU- GZ13100502–08), same data as for holotype ; one male and four females (Ps.-MHBU- GZ14101101–05), same locality as for holotype, 1 November 2014, Zhizhong Gao leg.

Etymology. The specific name is a patronym in honor of Dr. Luyu Wang, who collected the holotype of this species.

Diagnosis. Carapace with a total of 28–29 setae, including 4 on the anterior margin and 8–9 on the posterior margin; 4 eyes, anterior pair with vault- ed lens, posterior pair with flattened lens. Pedipalpal femur and patella with granulations on medial face, chelal hand with granulations on medial and lateral face. Male pedipalpal femur 2.77–3.05 (female 2.77–2.87), patella 2.12 (female 1.93–2.04), chela (without pedicel) 2.91–2.94 (female 2.65–2.69) times longer than broad; movable finger longer than hand (without pedicel). Male fixed chelal finger with 44–48 (female 43–49) teeth, movable finger with 46–51 (female 48–54) small teeth.

Description. Male ( Fig. 4a) – Pedipalps, carapace and chelicerae yellowish brown, abdomen and legs pale yellow.

Carapace ( Figs 5b, 6a). Smooth, 1.19 times longer than broad, with a total of 28–29 setae, including 4 on the anterior margin and 8–9 on the posterior margin; epistome small, triangular; 4 eyes, anterior pair with vaulted lens, posterior pair with flattened lens.

Chelicera ( Figs 5c, 6b). Hand with 7 setae, movable finger with 1 seta; fixed finger with 8 teeth; movable finger with 10–11 teeth; serrula exterior with 28–31 lamellae; serrula interior with 25–26 lamellae. Galea with 5 small terminal branches, structure as shown in fig. 5d. Rallum ( Fig. 5g) with 8 blades, all with anteriorly-directed spinules, the basalmost blade shortest.

Pedipalps ( Figs 5a, 5f, 6c, 6d). Apex of pedipalpal coxa rounded, with 3–4 setae. Pedipalpal femur and patella with granulations on medial face, chelal hand with granulations on medial and lateral face. Trochanter 1.61–1.64, femur 2.77–3.05, patella 2.12, chela (with pedicel) 3.06–3.12, chela (without pedicel) 2.91–2.94 times longer than broad, movable finger 1.24–1.30 times longer than hand (without pedicel). Fixed chelal finger with 8 and movable finger with 4 trichobothria: eb and esb on lateral margin of hand; ib, isb and ist in basal half, est in the middle, et and it in distal half of fixed finger; t and st near the middle of right chelicera, dorsal view; d = galea of male; e = galea of female; f = right pedipalp, dorsal view (trochanter, femur and patella); g = rallum; h = genital area of male; i = genital area of female; j = tip of telotarsus IV, lateral view. Scale bars: 0.05 mm (g); 0.10 mm (c, h–j); 0.20

mm (a, b, f)

movable finger, sb and b in basal half. Venom apparatus present only in fixed chelal finger, venom duct very short. Fixed chelal finger with 44–48 contiguous teeth, rounded in basal two thirds and cusped in distal third; movable finger with 46–51 contiguous teeth, mostly rounded, cusped only in distal end.

carapace, dorsal view; b = right chelicera, dorsal view; c = right chela, lateral view; d = right pedipalp, dorsal view; e = leg I, lateral view; f = leg IV, lateral view; g = genital area of male;

h = genital area of female

Abdomen. Pleural membrane granulated. Tergites and sternites with uniseriate setation, tergal chaetotaxy (I–XI): 11: 11: 11–12: 12: 12: 12: 12: 12: 13: 13–14: 7, sternal chaetotaxy (IV–XI): 10: 13–14: 17: 16: 16–18: 16: 14: 5; stigmata with 4 small setae on anterior margin, anal cone with 2 dorsal and 2 ventral setae. Male genital area ( Figs 5h, 6g): sternite II with a median and posterior group of 20–24 setae; sternite III with an anteromedian bisetous groove, followed by 13–15 median and posterior setae.

Legs. Leg I ( Fig. 6e) and leg IV ( Figs 5j, 6f) typical. Tibia IV with one medial tactile seta (TS = 0.51–0.55), basitarsus IV with one tactile seta in basal half (TS = 0.19), telotarsus IV with one sub-medial tactile seta (TS = 0.32–0.39). Subterminal tarsal seta bifurcate; arolium not divided, shorter than the slender and simple claws.

Female ( Fig. 4b) – As in holotype except where noted.

Chelicera. Fixed finger with 8–9 teeth; movable finger with 12 teeth; serrula exterior with 27–29 lamellae; serrula interior with 20–23 lamellae. Galea with 5 small terminal branches, structure as shown in fig. 5e.

Pedipalps. Trochanter 1.61–1.79, femur 2.77–2.87, patella 1.93–2.04, chela (with pedicel) 2.81–2.87, chela (without pedicel) 2.65–2.69 times longer than broad, movable finger 1.20–1.21 times longer than hand (without pedicel). Fixed chelal finger with 43–49 contiguous teeth, rounded in basal two thirds and cusped in distal third; movable finger with 48–54 contiguous teeth, mostly rounded, cusped only in distal end.

Abdomen. Tergal chaetotaxy (I–XI): 11: 11–12: 11–12: 12: 12: 12–13: 12: 12: 13: 13–14: 7, sternal chaetotaxy (IV–XI): 10: 14: 15–16: 16: 16: 15–16: 14: 5. Female genital area ( Figs 5i, 6h): sternite II with 4–5 setae on each side; sternite III with a row of 9–11 setae on the posterior margin.

Measurements (length/breadth or depth in mm). Male. Body length 2.07–2.59. Carapace 0.62–0.63×0.52–0.53 (1.19). Chelicera 0.41×0.19 (2.16), movable finger length 0.27. Pedipalpal trochanter 0.36–0.37×0.22–0.23 (1.61–1.64), femur 0.61×0.20–0.22 (2.77–3.05), patella 0.53×0.25 (2.12), chela (with pedicel) 1.01–1.06×0.33–0.34 (3.06–3.12), chela (without pedicel) 0.96–1.00×0.33–0.34 (2.91–2.94), hand length (without pedicel) 0.42–0.43, movable finger length 0.52–0.56 (1.24–1.30×hand). Leg I: trochanter 0.14×0.11–0.12 (1.17–1.27), femur 0.30×0.12 (2.50), patella 0.23–0.24×0.10–0.11 (2.18–2.30), tibia 0.29–0.30×0.08 (3.63– 3.75), basitarsus 0.13–0.15×0.06 (2.17–2.50), telotarsus 0.20–0.22×0.05 (4.00–4.40). Leg IV: trochanter 0.16–0.18×0.12–0.13 (1.33–1.38), femur + patella 0.58×0.20–0.21 (2.76–2.90), tibia 0.49–0.51×0.10–0.11 (4.64–4.90), basitarsus 0.16×0.08 (2.00), telotarsus 0.28×0.07 (4.00).

Female. Body length 2.74–2.97. Carapace 0.62–0.68×0.60–0.62 (1.03–1.20). Chelicera 0.45×0.20 (2.25), movable finger length 0.27. Pedipalpal trochanter 0.37–0.43×0.23–0.24 (1.61– 1.79), femur 0.61–0.66×0.22–0.23 (2.77–2.87), patella 0.53–0.54×0.26–0.28 (1.93–2.04), chela (with pedicel) 1.04–1.12×0.37–0.39 (2.81–2.87), chela (without pedicel) 0.98–1.05×0.37–0.39 (2.65–2.69), hand length (without pedicel) 0.44–0.48, movable finger length 0.53–0.58 (1.20– 1.21×hand). Leg I: trochanter 0.14×0.11 (1.27), femur 0.30×0.12 (2.50), patella 0.23–0.24×0.10 (2.30–2.40), tibia 0.29–0.30×0.08 (3.63–3.75), basitarsus 0.14×0.06 (2.33), telotarsus 0.20– 0.21×0.05 (4.00–4.20). Leg IV: trochanter 0.18×0.13 (1.38), femur + patella 0.58×0.20–0.21 (2.76– 2.90), tibia 0.49–0.50×0.10 (4.90–5.00), basitarsus 0.16×0.08 (2.00), telotarsus 0.28×0.07 (4.00).

Distribution. China (Guizhou).

Remarks. The other Bisetocreagris species with comparable pedipalpal size (pedipalpal femur 0.61–0.66, patella 0.53–0.54 mm in length) are B. pygmaea , B. turkestanica (Beier, 1929) , B. philippinensis , B. furax , B. klapperichi , B. parablothroides (Beier, 1951) and B. shunhuangensis . Bisetocreagris wangi can be distinguished from these species by: carapace with 28–29 setae (24–26 in B. pygmaea ; 22 in B. philippinensis ; 22 in B. klapperichi ; 25 in B. furax ); pedipalpal femur with granulations on medial face (pedipalpal femur smooth in B. shunhuangensis ); pedipalpal patella with granulations on medial face (pedipalpal patella smooth in B. furax , B. klapperichi and B. shunhuangensis ); pedipalpal femur 2.77–3.05 (3.50 in B. turkestanica ; 3.40–3.50 in B. philippinensis ; 4.00 in B. klapperichi ; 4.20 in B. furax ) times longer than broad; chelal finger longer than hand (chelal finger equal in length to hand in B. parablothroides and B. klapperichi ); fixed chelal finger with 43–49, movable finger with 46–54 teeth (chelal finger with 55–60 teeth in B. parablothroides ).