Amauropelma beyersdorfi, Jager, 2012

Jäger, Peter, 2012, Asian species of the genera Anahita Karsch 1879, Ctenus Walckenaer 1805 and Amauropelma Raven, Stumkat & Gray 2001 (Arachnida: Araneae: Ctenidae), Zootaxa 3429 (1), pp. 1-63 : 43-45

publication ID 10.11646/zootaxa.3429.1.1

persistent identifier

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scientific name

Amauropelma beyersdorfi

sp. nov.

Amauropelma beyersdorfi View in CoL spec. nov.

Figs 179–186 View FIGURE 179 View FIGURES 180–183 View FIGURES 184–189

Type material. Holotype male ( SMF), India, Himachal Pradesh, Shimla, University Campus , N 31°6.8', E 77°8.5', 2000–2200 m altitude, Y.M. Marusik leg. 25.–27.V.1999. GoogleMaps

Etymology. This species is named in honour of my secondary school maths and physics teacher, Klaus Beyersdorf (Paderborn, Germany), for his patience with a class of children (Sexta to Quarta) and his excellent teaching; name in genitive case.

Diagnosis. Small Ctenidae (total length male 5.8). Male palp ( Figs 180–183 View FIGURES 180–183 ) similar to that of A. torbjorni Raven & Gray 2001 in having a prolateral extension on the proximal cymbium and a transverse elongated tegular apophysis arising subproximally from the tegulum (arising centrally in other Asian species). Distinguished from A. torbjorni by (1) the shorter cymbial tip, (2) the spiky prolateral end of the tegular apophysis, (3) the RTA arising

Description. Male (holotype). PL 3.0, PW 2.3, AW 1.2, OL 2.5, OW 1.4. Eye diameters and interdistances ( Fig. 186 View FIGURES 184–189 ): AME 0.12, ALE 0.13, PME 0.17, PLE 0.15, AME–AME 0.06, AME–ALE 0.11, PME–PME 0.05, PME–PLE 0.19, AME–PME 0.04, ALE–PLE 0.07, clypeus AME 0.08, clypeus ALE 0.16. Palp and leg measurements: palp 3.7 (1.25, 0.6, 0.65, -, 1.2), I 9.2 (2.5, 1.2, 2.4, 1.9, 1.2), II 8.15 (2.2, 1.1, 2.0, 1.8, 1.05), III 7.85 (2.1, 1.0, 1.8, 1.9, 1.05), IV 10.45 (2.8, 1.05, 2.5, 2.8, 1.3). Leg formula 4123. Spination of palp and legs: palp 130, 100, 1101; femora I p002, d111, II p012, d111, III p012, d112(1), r012, IV p012(1), d111, r002(1); patellae I– II 000, III–IV 001; tibiae I v22222, II p010, v22222, III p11, d111, r11, v222, IV p 11, d111, r11, v222; metatarsi I p010, v222, II p010, v222, r010, III–IV p112, d010, r112, v222. Chelicerae with 3 promarginal, 5 retromarginal teeth, without denticles. Retromargin of chelicerae close to fang base with 1 bristle. Tarsi and metatarsi without scopula. Claw tufts arising separately, but intermingle distally. Leg claws I with 5, II–III with 3(4), and IV with 5 secondary teeth. Position of tarsal organ: I 0.80, II 0.75, III 0.70, IV 0.70.

Palp as in diagnosis ( Figs 180–183 View FIGURES 180–183 ). Embolus arising in an 8-o’clock-position from tegulum, its base as half as broad as tegulum. Conductor arising in retrolatero-distal quarter from tegulum. Tegular apophysis excavated on distal side. RTA sticking out at a right angle from tibia in ventral view, with angled distal side.

Colour ( Figs 184–185 View FIGURES 184–189 ). Yellowish-brown. Dorsal prosoma with eyes marked with black rings, faint radial markings; fovea distinct, reddish-brown. Chelicerae same colour as dorsal prosoma. Sternum, labium, with serrated external margins, partly fused medially. Lateral opisthosoma with dark lines, especially in posterior half. Ventral opisthosoma pale yellowish brown with 3 pairs of indistinct patches in front of spinnerets. Black ring around spinnerets incomplete anteriorly.

Female. Unknown.

Distribution. Known only from the type locality ( Fig. 179 View FIGURE 179 : 1).


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