Sinopoda ruam, 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 : 56-57

Sinopoda ruam spec. nov.

Figs 37 a–b, 62 g–h

Type material: Holotype: female (SD 1289), THAILAND: Chiang Mai Province: Doi Chiang Dao, Tham Doi Chiang Dao , N19°23’39”, E98°55’40”, 470 m, in cave, by hand, 24 June 2014, P. Jäger, S. Li & E. Grall leg. ( SMF).

Paratypes: 2 females with same data as for holotype ( SMF) . 2 females with same data as for holotype, except: 28 June 2014, P. Jäger & E. Shaw leg. ( SMF) .

Addition material examined (1 female, 1 subadult male, 18 juveniles): THAILAND: Chiang Mai Province : 1 female (SD 1142), Doi Chiang Dao Cave , 19°21’N, 98°10’E, 600 m, 06 March 1989, M. Anderson & H. Read leg., field number #323 ( ZMUC) . 11 juveniles with same data as for holotype ( SMF) . 1 subadult male and 7 juveniles with same data as for holotype, except: 28 June 2014, P. Jäger & E. Shaw leg. ( SMF) .

Etymology: The species name is derived from the Thai word “ruam” meaning “combine” and referring to the female copulatory organ which combines characteristics of the genera Sinopoda and Heteropoda ; term in apposition.

Diagnosis: Females of Sinopoda ruam spec. nov. can be distinguished from other Sinopoda species by the combination of the following characters: 1. lateral lobes fused with visible seam running from epigastric furrow to copulatory opening, 2. lobal septum extending only in anterior half of epigyne, 3. anterior part of spermathecae as wide as posterior part, 4. glandular appendages shorter than anterior part of internal duct system and 5. anterior and posterior part of internal duct system diverging.

Note: We recognized the similarities between females of this species and those of the chiangmaiensis -group. But there are also some differences that encouraged us not to include this species in the group: 1. the fused lateral lobes with the visible seam, 2. the absence of the sclerotized bulges besides the lobal septum, 3. posterior part of the internal duct system as wide as anterior part and 4. internal duct system longer than wide. Therefore, we do not include it in a particular species group until a (molecular) phylogeny can prove its systematic placement unambiguously.

Description: Female (holotype): Total length 11.90; prosoma 5.80 long, 4.75 wide, anterior width of prosoma 3.00; opisthosoma 6.10 long, 3.70 wide. Eye measurements: AME 0.25; ALE 0.38; PME 0.28; PLE 0.42; AME– AME 0.15; AME–ALE 0.04; PME–PME 0.23; PME–PLE 0.33; AME–PME 0.28; ALE–PLE 0.29; clypeus AME 0.31; clypeus ALE 0.28. Leg formula: 2413. Measurements of palp and legs: palp: 9.20 (2.80, 1.40, 2.10, 2.90); I: 26.90 (7.30, 3.00, 7.80, 6.70, 2.10); II: 29.90 (8.40, 3.30, 8.70, 7.30, 2.20); III: 25.70 (7.30, 2.80, 7.30, 6.30, 2.00); IV: 27.70 (7.50, 2.60, 7.70, 7.60, 2.30). Spination: palp: 131, 101, 2121, 1014; legs: Fe I&III 323, II 323/423, IV 331; Pa I–IV 001; Ti I& III 2026, II 1026 /2026, IV 2226; Mt I–II 0004, III 2016, IV 3036. Cheliceral furrow with 3 anterior and 4 posterior teeth.

Colouration in ethanol: Prosoma yellow, anteriorly yellowish-red, posterior and lateral margin brown. Sternum yellowish-white, laterally with brown margin. Opisthosoma whitish-grey, anterior part white, posteriorly with grey spots, postero-medially with light brown spots, ventrally whitish-yellow. Chelicerae reddish-brown, proximal part light brown with two brown stripes. Palps yellowish-brown; Mt reddish-brown. Legs yellowish-brown.

Copulatory organ as in diagnosis. Epigynal field longer than wide with two short anterior bands and two slit sensilla. Lateral lobes posteriorly with strong median indentation. Copulatory atrium situated anteriorly, oval and with longitudinal sclerotized structure. Epigynal pockets running from latero-anterior to medio-anterior and extending only in anterior part. Fusion bubbles situated at posterior part of epigyne. Internal duct system longer than wide. Anterior part of spermathecae curved, posterior part bulging latero-posteriorly. Glandular appendages short, extending only in anterior half of internal duct system and latero-posteriad. Fertilization ducts arising postero-medially, long, curved and distal part wide.

Male: Unknown.

Variation: Female: Total length 11.40–14.90; prosoma 5.70–6.90 long, 4.80–5.70 wide, anterior width of prosoma 3.00–3.50; opisthosoma 5.60–8.30 long, 3.30–4.70 wide. Measurements leg I: total length 27.70–32.70, Fe 7.50–8.80, Pa 3.10–3.50, Ti 8.10–9.60, Mt 6.90–8.50, Ta 2.10–2.50. Spination: palp: Ti 2121/2131; legs: MT III 2017 /2016; Fe IV 321.

Lateral lobes of one female posteriorly only with small median indentation.

Distribution: Known only from the type locality.

Figures

FIGURES 37 a–b. Sinopoda ruam spec. nov., holotype female from Tham Doi Chiang Dao, copulatory organ. a Epigyne, ventral; b Vulva, dorsal.