Bisetocreagris yangae, Guo & Fe. Zhang, 2017

Guo, Xiangbo & Zhang, Feng, 2017, Two New Species Of Bisetocreagris Ćurčić, 1983 (Pseudoscorpiones: Neobisiidae) From China, Acta Zoologica Academiae Scientiarum Hungaricae 63 (1), pp. 71-82 : 72-77

Bisetocreagris yangae sp. n.

(Figs 1–3)

Typematerial – Holotypemale (Ps.- MHBU-AH13102301 ), China: AnhuiProvince , HuangshanCity, LingnanTown (29°26’N, 118°10’E), alt. 296 m, 23 November 2013, leg: Jie Yang. Paratypes: threemalesandsevenfemales (Ps.- MHBU – AH13102302–11 ), samedata asforholotype .

Etymology – ThespecificnameisapatronyminhonourofMsJieYang, whocollectedthespecimens.

Diagnosis – Rallumconsistsof 8 blades; pedipalpalfemur, patellaand chelasmooth, femur 2.60–2.78, patella 1.57–1.65, chela (withoutpedicel) 2.18– 2.42 timeslongerthanbroad, movablefinger 0.72–0.82 timeslongerthanhand (withoutpedicel); sterniteIIIwith 3–4 setaeontheanteriormargin, and 6–7 setaeontheinternalpartsofthegenitaliainmale.

Description – Male (Fig. 1a) – Colourmostlybrown, pedipalpsdarker, legsyellow. Setaeofbodystraightandacicular.

Carapace (Figs 2a, 3b) – Smooth, 0.97–1.06 timeslongerthanbroad, withatotalof 26–29 setae, including 4 ontheanteriormarginand 8–9 ontheposteriormargin; paired lyrifissuresneartheeyesandposteriormargin; epistomesmall, triangular; 4 eyes, anterior pairwithlens, posteriorpairwithweaklens.

Chelicera (Figs 2b, 3c) – Handwith 7 setae, movablefingerwith 1 seta; fixedfinger with 6–9 teeth; movablefingerwith 7–9 teeth; serrulaexteriorwith 35–39 lamellae; serrula interiorwith 20–22 lamellae. Galea (Fig. 2c) withtwoterminalbranches. Rallum (Fig. 2e) consistsof 8 blades, allwithanteriorly-directedspinules, basalmostbladetheshortestand distalmostbladewidenedatbase.

Pedipalps (Figs 2f,g, 3a,d) – Apexofpedipalpalcoxarounded, with 4 setae. Femur, patellaandchelasmooth; chelalfingersshorterthanhand. Trochanter 1.28–1.41, femur 2.60–2.78, patella 1.57–1.65, chela (withpedicel) 2.29–2.61, chela (withoutpedicel) 2.18–2.42 timeslongerthanbroad, movablefinger 0.72–0.82 timeslongerthanhand (withoutpedi- cel). Fixedchelalfingerwith 8 andmovablefingerwith 4 trichobothria: eb and esb onlateral marginofhand; ib, isb and ist inbasalhalf, et and it indistalhalf, est almostinthemiddle offixedfinger; t and st nearthemiddleofmovablefinger, sb and b onbasalhalf. Venom apparatuspresentonlyinfixedchelalfinger, venomductveryshort. Chelalteethrounded andcontiguous, fixedfingerwith 50–55 andmovablefingerwith 64–67 teeth.

Abdomen – Pleuralmembranegranulated. Tergitesandsterniteswithuniseriatese- tation, tergalchaetotaxy (I–X): 11–13: 13: 14: 15–16: 15–16: 15: 15: 15–16: 14: 11–12, sternal chaetotaxy (IV–X): 8–12: 15–17: 17–18: 17–20: 17–18: 15–17: 13; stigmatawith 5–7 setaeon anteriormargin; analconewith 2 dorsaland 2 ventralsetae. Malegenitalarea (Figs 2h, 3e): sterniteIIwith 20–25 scatteredsetae; sterniteIIIwith 3–4 setaeontheanteriormargin, anteromediangrooveabsent, followedby 18 intermediaryandposteriorsetae; thereare 6–7 setaeontheinternalpartsofthegenitalia.

Legs – LegI (Figs 2j, 3g) andlegIV (Figs 2k, 3h) typical. TibiaIVwithonesub- medial tactileseta (TS=0.41–0.44), basitarsusIVwithabasaltactileseta (TS=0.17–0.21), telotarsus IVwithonesub- medialtactileseta (TS=0.43–0.49). Subterminaltarsalsetabifurcate; aro- liumnotdivided, shorterthantheslenderandsimpleclaws.

Female (Fig. 1b) – asinholotypeexceptwherenoted.

Fig. 1. Bisetocreagrisyangae sp. n.: a = holotypemale, habitus, dorsalview, b = paratype female, habitus, dorsalview

Fig. 2. Bisetocreagrisyangae sp. n., holotypemale (Figsa–c, e–h, j–k), paratypefemale (Figs d, i): a = carapace, dorsalview, b = leftchelicera, dorsalview, c = galeaofmale, d = galea offemale, e = rallum, f = leftpedipalp, dorsalview (trochanter, femurandpatella), g = left chela, lateralview, showingtrichobothriotaxyandteeth, h = genitalareaofmale, i = genital areaoffemale, j = rightlegI, lateralview, k = rightlegIV, lateralview. Scalebars: 0.05 mm

(c–e); 0.20 mm (h, i); 0.50 mm (a, b); 1.00 mm (f, g, j, k)

Chelicera – Fixedfingerwith 6–7 teeth; movablefingerwith 8–10 teeth; serrulaexte- riorwith 39–42 lamellae; serrulainteriorwith 26–28 lamellae. Galeawelldeveloped, struc- tureasshowninFigure 2d.

Pedipalps – Trochanter 1.34, femur 2.33–2.50, patella 1.58–1.69, chela (withpedicel) 2.37–2.38, chela (withoutpedicel) 2.21–2.22 timeslongerthanbroad, movablefinger 0.77– 0.82 timeslongerthanhand (withoutpedicel). Chelalteethroundedandcontiguous, fixed fingerwith 39–43 andmovablefingerwith 47–52 teeth.

Abdomen – Tergitesandsterniteswithuniseriatesetation, tergalchaetotaxy (I–X): 11–12: 12–15: 13–14: 14–15: 14–15: 15–17: 12–17: 13–16: 12–15: 9–11, sternal chaetotaxy (IV– X): 10–11: 14–17: 17: 17–19: 16–17: 17: 13–14. Femalegenitalarea (Figs 2i, 3f): sterniteIIwith 3-4 setaeoneachside; sterniteIIIwitharowof 12–14 setaeontheposteriormargin.

Measurements (length/breadthordepthinmm, ratiosinparentheses) – Male. Body length 3.78–4.35. Carapace 0.94–0.95×0.90–0.97 (0.97–1.06). Chelicera 0.48–0.62×0.28–0.33 (1.71–1.88), movablefingerlength 0.32–0.40. Pedipalpaltrochanter 0.41×0.29–0.32 (1.28– 1.41), femur 0.91–1.03×0.35–0.37 (2.60–2.78), patella 0.76–0.80×0.46–0.51 (1.57–1.65), chela (withpedicel) 1.42–1.67×0.62–0.64 (2.29–2.61), chela (withoutpedicel) 1.35–1.55×0.62–0.64 (2.18–2.42), handlength (withoutpedicel) 0.81–0.88, movablefingerlength 0.58–0.72 (0.72– 0.82×hand). LegI: trochanter 0.18–0.19×0.17–0.19 (0.95–1.12), femur 0.44–0.51×0.17–0.20 (2.55–2.59), patella 0.34–0.57×0.17–0.18 (2.00–3.17), tibia 0.44–0.48×0.11–0.13 (3.69–4.00), basitarsus 0.17–0.20×0.09–0.10 (1.89–2.00), telotarsus 0.28–0.29×0.09 (3.11–3.22). LegIV: trochanter 0.30–0.41×0.22–0.23 (1.30–1.86), femur + patella 0.93–0.96×0.36–0.37 (2.58–2.59), tibia 0.80–0.81×0.18–0.19 (4.26–4.44), basitarsus 0.24–0.30×0.13–0.14 (1.85–2.14), telotarsus 0.35×0.12 (2.92).

Female. Bodylength 3.93–4.45. Carapace 0.99–1.08×1.00–1.04 (0.99–1.04). Chelicera: 0.56–0.65×0.35–0.38 (1.60–1.71), movablefingerlength 0.39–0.42. Pedipalpaltrochanter 0.43–0.47×0.32–0.35 (1.34), femur 0.90–0.98×0.36–0.42 (2.33–2.50), patella 0.81–0.84×0.48– 0.53 (1.58–1.69), chela (withpedicel) 1.59–1.71×0.67–0.72 (2.37–2.38), chela (withoutpedicel) 1.48–1.60×0.67–0.72 (2.21–2.22), handlength (withoutpedicel) 0.88–0.96, movablefinger length 0.72–0.74 (0.72–0.82×hand). LegI: trochanter 0.21–0.23×0.18 (1.17–1.28), femur 0.41– 0.45×0.16–0.17 (2.56–2.65), patella 0.25–0.31×0.16–0.17 (1.47–1.94), tibia 0.39–0.44×0.12–0.13 (3.25–3.38), basitarsus 0.19–0.21×0.09–0.10 (2.10–2.11), telotarsus 0.28–0.29×0.08–0.09 (3.11– 3.63). LegIV: trochanter 0.31–0.33×0.24–0.26 (1.27–1.29), femur + patella 0.91–0.97×0.36– 0.38 (2.53–2.55), tibia 0.66–0.81×0.18–0.19 (3.67–4.26), basitarsus 0.29–0.31×0.13 (2.23–2.38), telotarsus 0.37–0.39×0.12–0.13 (3.00–3.08).

Distribution – China (Anhui).

Remarks – Thisnewspecieshas 3–4 setaeontheanteriormarginofsterniteIIIinthemaleinsteadof 2, butitstrichobothrialpatternandrallumstruc- tureconformtothecharacteristicsofthegenus Bisetocreagris . ScHAwAllEr, 1985 noticedthisdifferencefirstin B. tenuis Redikorzev, 1934 . DAsHdAmIrOv andScHAwAllEr, 1992 alsonotedthisin B. gracilis Redikorzev, 1934 , B. kaznakovi Redikorzev, 1918 and B. turkestanica Beier, 1929 . DAsHdAmIrOvandScHAwAllEr, 1992 suggestedthatspeciesseparationisbasedonthedistinctionof proportions, granulations, dentationsandtrichobothriotaxyofthepedipalps (notthestructureofthegenitalarea) inthegenus Bisetocreagris .

Fig. 3. Bisetocreagrisyangae sp. n., holotypemale (Figsa–e, g, h), paratypefemale (Fig. f): a = leftpedipalp, dorsalview, b = carapace, dorsalview, c = leftchelicera, dorsalview, d = left chela, lateralview, e = genitalareaofmale, f = genitalareaoffemale, g = rightlegI, lateral

view, h = rightlegIV, lateralview

Thechelalfingersof B. yangae areshorterthanthehand; thisalsooccurs in B. japonica (Ellingsen, 1907) , B. brevidigitata (Chamberlin, 1930) and B. silvestrii . B. yangae canbedistinguishedfromthesespeciesbyitssmoothpedipalps, pedipalpalfemurandchelalhandwithdistinctgranulationsin B. japonica , and theanteriorfaceofpedipalpalfemurslightlygranulatein B. brevidigitata and B. silvestrii ( HArvEy 1999). Additionally, B. yangae differsfrom B. brevidigitata and B. silvestrii bythefollowingcharacters: rallumwith 8 blades (rallumwith 7 bladesin B. brevidigitata female), shorterchelalfingers (movablefinger 0.92 vs 0.72–0.82 timeslongerthanhandin B. silvestrii ) andmovablechelalfingerwith 64–67 teeth (about 78 teethin B. silvestrii ).