Sinopoda arboricola, Grall & Jäger, 2020

Grall, Elena & Jäger, Peter, 2020, Forty-seven new species of Sinopoda from Asia with a considerable extension of the distribution range to the South and description of a new species group (Sparassidae: Heteropodinae), Zootaxa 4797 (1), pp. 1-101 : 7-8

Sinopoda arboricola spec. nov.

Figs 2 a–e, 55 c–f

Type material: Holotype: male ( PJ 898 ), MALAYSIA: Sarawak Province : Matang Reserve, Mt. Senapi, 304 m, 25 March to 25 April 1984, C.L. & P. R. Deeleman leg. ( RMNH).

Paratypes: 1 female ( PJ 899 ) with same data as for holotype ( RMNH) . 1 female ( SD 1557 ) with same data as for holotype except: collected in primary forest, 02 January 1984 ( RMNH) .

Additional material examined: (2 subadult males, 5 juveniles): 1 subadult male, 4 juveniles with same data as for holotype ( RMNH) . 1 subadult male, 1 juvenile with same data as for second female paratype ( RMNH) .

Etymology: The species name is a compound word and derived from the Latin word “arbor” meaning “tree” and the Latin word “colere” meaning “to occupy”, referring to the habitat were the species where collected; adjective.

Diagnosis: Males of S. arboricola spec. nov. are similar to those of S. grandispinosa Liu et al., 2008 in having a vRTA longer than dRTA and to S. nuda Liu et al., 2008 in having a tegulum with proximal part narrower than distal part. It is distinguished from S. grandispinosa by 1. smaller body size reaching 3.00 (9.80 in S. grandispinosa ), 2. embolus slightly curved and proximal part nearly as wide as distal part (embolus S-shaped and proximal part four times the size as distal part in S. grandispinosa ), 3. ventral branch of RTA in retrolateral view narrow and curved, dorsal branch in retrolateral view short and tapering (ventral branch in retrolateral view straight and wide, dorsal branch in retrolateral view narrow and rounded in S. grandispinosa ), 4. distal part of conductor rounded (laminar in S. grandispinosa ) and 5. spermophore curved in ventral view (straight in ventral view in S. grandispinosa ); from S. nuda by 1. smaller body size reaching 3.00 (14.90 in S. nuda ), 2. embolic apophysis present (absent in S. nuda ), 3. embolus slightly curved and proximal part nearly as wide as distal part (embolus S-shaped and proximal part three times as wide as distal part in S. nuda ) and 4. ventral branch of RTA longer than dorsal branch, narrow and tapering in ventral view, dorsal branch tapering in retrolateral view and without stiff setae at the base of the RTA (ventral branch nearly as long as dorsal branch, stout and wide in ventral view, dorsal branch curved and with stiff setae at the base of the RTA in S. nuda ).

Females of S. arboricola spec. nov. may be distinguished from all other Sinopoda -species by the combination of the following characters: 1. epigynal pockets extending only in anterior half of epigyne; 2. anterior part of internal duct system narrower than posterior part and 3. lack of glandular appendages.

Description: Male (holotype): Total length 3.00; prosoma 1.60 long, 1.60 wide, anterior width of prosoma 0.90; opisthosoma 1.40 long, 0.90 wide. Eye measurements: AME 0.08; ALE 0.16; PME 0.09; PLE 0.21; AME– AME 0.09; AME–ALE 0.02; PME–PME 0.17; PME–PLE 0.18; AME–PME 0.17; ALE–PLE 0.14; clypeus AME 0.13; clypeus ALE 0.11. Leg formula: 2431. Measurements of palp and legs: palp: 2.35 (0.70, 0.40, 0.45, 0.80); I: 5.75 (1.60, 0.70, 1.50, 1.40, 0.55); II: 7.00 (2.00, 0.80, 1.90, 1.70, 0.60); III: 6.05 (1.80, 0.70, 1.60, 1.45, 0.50); IV: 6.30 (1.80, 0.60, 1.60, 1.70, 0.60). Spination: palp: 131, 101, 121; legs: Fe I– III 323, IV 321; Pa I-IV 000; Ti I–II 1026, III–IV 2126; Mt I 0016/0006, II 0006, III–IV 3036. Cheliceral furrow with 3 anterior and 4 posterior teeth.

Colouration in ethanol: Prosoma yellowish-brown, medio-laterally with brown semicircular-pattern, anteriorly with dark brown spot around PLE. Lateral and posterior margin brown. Sternum yellow. Opisthosoma yellow with brown spots. Antero-laterally with yellow stripes, median part lighter. Ventral part yellowish-white. Chelicerae yellowish-brown. Palps yellowish-brown. Legs yellowish-brown; Fe ventrally brownish.

Palp as in diagnosis. Embolic apophysis slightly curved, nearly twice the size of embolus and nearly as long as embolus. Embolus filiform. Conductor arising from 12- to 1-o’ clock-position. dRTA only visible in retrolateral view, much shorter than vRTA. vRTA long and tip tapering in ventral view, rounded in retrolateral view.

Description: Female (paratype, SD 1557): Total length 4.10; prosoma 1.80 long, 1.80 wide, anterior width of prosoma 1.10; opisthosoma 2.30 long, 1.60 wide. Eye measurements: AME 0.09; ALE 0.17; PME 0.10; PLE 0.22; AME–AME 0.13; AME–ALE 0.03; PME–PME 0.17; PME–PLE 0.19; AME–PME 0.17; ALE–PLE 0.19; clypeus AME 0.14; clypeus ALE 0.11. Leg formula: 2431. Measurements of palp and legs: palp: 2.78 (0.75, 0.50, 0.68, 0.85); I: 5.90 (1.60, 0.80, 1.55, 1.40, 0.55); II: 7.23 (2.00, 0.88, 1.95, 1.80, 0.60); III: 6.20 (1.80, 0.70, 1.70, 1.50, 0.50); IV: 6.75 (1.85, 0.70, 1.70, 1.80, 0.70). Spination: palp: 131, 101, 2121, 1004; legs: Fe I–III 323, IV 321; Pa I–IV 000; Ti I–II 1016, III 2026, IV 2126; Mt I–III 0006, IV 3136. Cheliceral furrow with 3 anterior and 4 posterior teeth.

Colouration in ethanol: Prosoma yellowish-brown, medially with brown semicircular-pattern, posterior and lateral margins dark brown, anteriorly with dark brown spot around PLE. Sternum yellow with brown margin. Opisthosoma yellowish-brown, ventral part yellow. Chelicerae yellowish-brown. Palps yellowish-brown. Legs yellowish-brown; Fe prolaterally brownish.

Copulatory organ as in diagnosis. Epigynal field almost as wide as long, without anterior bands and slit sensilla. Epigynal pockets short, running from the median part to medio-anterior. Lateral lobes fused. Lobal septum small. Internal duct system longer than wide. Fusion bubbles situated at median part of epigyne. Anterior part of internal duct system long, narrow, running parallel and fused only half along median line. Posterior part fused along median line. Fertilization ducts arising postero-medially, curving antero-laterally, narrow and long.

Variation: Female (PJ 899): Total length 3.60; prosoma 1.75 wide; opisthosoma 1.80 long, 1.20 wide. Measurements leg I: total length 6.25 (1.7, 0.85, 1.65, 1.45, 0.6). Spination: legs: Mt III 2026.

Distribution: Known only from the type locality.

Figures

FIGURES 2 a–e. Sinopoda arboricola spec. nov., holotype male and paratype female from Matang reserve. a–c left male palp (a prolateral, b ventral, c retrolateral); d Epigyne, ventral; e Vulva, dorsal. AP—anterior part of spermathecae, C—conductor, dRTA—dorsal branch of RTA, E—embolus, EA—embolic apophysis, EP—epigynal pockets, FD—fertilization ducts, LL—lateral lobes, LS—lobal septum, PP—posterior part of spermathecae, SP— spermophore, TE—tegulum, vRTA—ventral branch of RTA.