Karriella treenensis, Gray & Smith, 2008

Gray, Michael R. & Smith, Helen M., 2008, A New Subfamily of Spiders with Grate-shaped Tapeta from Australia and Papua New Guinea (Araneae: Stiphidiidae: Borralinae), Records of the Australian Museum 60 (1), pp. 13-44: 34

publication ID

http://doi.org/ 10.3853/j.0067-1975.60.2008.1493

persistent identifier

http://treatment.plazi.org/id/038E4730-6E21-C156-E513-A213FC573DB8

treatment provided by

Felipe

scientific name

Karriella treenensis
status

n.sp.

Karriella treenensis   n.sp.

Figs 2e–g View Fig , 8c View Fig , 13a–g View Fig , 15a–b View Fig

Type material. Western Australia: HOLOTYPE:?, KS14774, Treen Brook , 5 km SE of Pemberton, 34°26'S 116°04'E, 11 Feb. 1979, M.R. Gray, in log GoogleMaps   . PARATYPES: 3 !!, KS14775, KS82652–3, data as holotype;!, KS14792, Treen Brook SF, 8 km west of Pemberton, 34°26'S 116°02'E, 12 Feb.1979, M.R. Gray, in litter; 3 ??, KS34750, KS82654–6, Manjimup , 34°15'S 116°09'E, 1971, J. Springett, SW Forest Survey Ref 19FSS;?, WAM T78284 View Materials , data as KS82654–6;?, 2 !!, WAM 74/7–10, 12 miles W of Manjimup, ca 34°13'S 115°56'E, 11 Mar. 1971, H. Butler, litter GoogleMaps   .

Other material. Western Australia: 2 !!, KS14690, KS85058, Warren NP, Old Vasse Road , 34°30'S 116°00'E, 10 Feb. 1979 GoogleMaps   , M.R. Gray, large filmy horizontal sheet web suspended from low mossy bark on karri trunk;?, KS14702, Dombakup SF, 34°30'S 116°00'E, 4 Feb.1979 GoogleMaps   , M.R. Gray, in sheet web on dry culvert bank, palp used for SEM; 3 ??, KS15305, Pine Creek, 0.5 km from Quarty Rd, Nannup–Pemberton area , 34°15'S 115°50'E, 14 Feb. 1979 GoogleMaps   , M.R. Gray, pitfall traps in litter, 26 Jan.–4 Mar. 1979;?, KS34749,!, KS34751, Pemberton, Brockman NP, 34°30'S 116°00'E, 22 Jan. 1974 GoogleMaps   , M.R. Gray, under logs in karri forest;!, KS34752, Pemberton, 34°30'S 116°00'E, 1971, J. Springett, SW Forest Survey Ref 21FSS;!, KS34753, Shannon River ( Nelson Rd ) Northcliffe , 34°39'S 116°21'E, Jan. 1974 GoogleMaps   , M.R. Gray, in webs on river bank—web in expanding half bell shape, 30 cm diameter; 2 !!, KS14862, Boranup Drive, off Caves Road near Karridale , 34°05'S 115°03'E, 14 Feb. 1979 GoogleMaps   , M.R. Gray, in sheet webs in soil banks and in hanging curled bark near ground; 2 ??, KS15143, as KS14862 but pitfall traps, 26 Jan.–3 Mar. 1979.

Diagnosis. Differs from K. walpolensis   by the slit-like dorsal groove on the male palpal RDTA; female with epigynal fossa relatively wider and copulatory ducts shorter and arranged in a compact S-shape.

Description

Male (holotype). BL 5.02, CL 2.45 (range 2.45–3.55), CW 2.04, CapW 1.10, EGW 0.78, LL 0.39, LW 0.45, SL 1.33, SW 1.14. Legs: 1423 (I: 11.51; II: 9.92; III: 8.57; IV: 10.20); ratio tibia I length:CW = 1:0.70. Male palp ( Fig. 13a–c View Fig ). Palpal bulb longer than wide. Dorsal groove on RDTA narrow, slit-like. Distal conductor with a large, crestlike process sub-apically. Putative stridulatory bristles on retrolateral paturon, either in 1–2 rows ( Fig. 15a View Fig ) or more scattered (occasionally indistinct); prolateral basal half of femur with a row or patch of very short setae with thickened bases ( Fig. 15b View Fig ).

Female (KS14775). BL 6.33, CL 3.18 (range 2.92–3.62), CW 2.04, CapW 1.39, EGW 0.94, LL 0.47, LW 0.47, SL 1.45, SW 1.25. Legs: 1423 (I: 10.98; II: 9.35; III: 8.12; IV: 9.88); ratio tibia I length:CW = 1:0.74. Stridulatory organ present but less strongly developed than in male, setae grouped irregularly, not in row. Epigynum ( Fig. 13d–g View Fig ). Fossa an inverted U-shape ( Fig. 13d View Fig ), may be narrowed posteriorly ( Fig. 13f View Fig ); fossa length (from anterior margin to line between epigynal knob centres) c. 2× fossa width. Fossa sometimes plugged and the posterior epigynal “knobs” may be damaged or missing ( Fig. 13f View Fig ). Internal genitalia with copulatory ducts and spermathecae making a tight S-shape.

Variation. The bowed male metatarsi I are sometimes pencilled laterally with a pair of dark brown longitudinal lines. Specimens from the Karridale/Boranup area east of Pemberton lack any obvious cheliceral “stridulatory” setae.

Distribution. The Pemberton–Karridale region of the southwest corner of Western Australia.

Etymology. The species name refers to Treen Brook, W.A., the type locality.