Thalassius sp. cf. paralbocinctus Zhang, Zhu & Song 2004

Jäger, Peter, 2007, Spiders from Laos with descriptions of new species (Arachnida: Araneae), Acta Arachnologica 56 (1), pp. 29-58 : 44

Thalassius sp. cf. paralbocinctus Zhang, Zhu & Song 2004 Figs. 44 -46

Material examined. 1 female ( SMF 56219 ), L23 .

The specimen could not be identified unambiguously due to variation in comparison to types of T. paralbocinctus as shown in Zhang et al. (2004): Accessory bulbs extending not beyond the head of spermathecae laterally ( Fig. 45 ; extending clearly beyond the head of spermathecae in T. paralbocinctus cf. Zhang et al. 2004: fig. 166), anterior margin of lateral lobes building almost a proper semi-circle ( Fig. 44 ; forming a flat semi-circle in T. paralbocinctus, Zhang et al. 2004 : fig. 165). In contrast to T. albocinctus (Doleschall 1859) both specimens from China and Laos have a dark margin of the two lateral white bands of the dorsal shield of prosoma and no white patch in the anterior half of the dark median band (Fig. 46, Zhang et al. 2004: fig. 163; cf. Sierwald 1987: fig. 140). Moreover, their heads of spermathecae are more compact than those of T. albocinctus ( Fig. 45 , Zhang et al. 2004: fig. 166; more slender in T. albocinctus cf. Sierwald 1987: fig. 133). Slit sense organs close to the epigynal field are shown for the first time. The female was sitting on a leaf of a shrub about one meter above the ground.

Figures

Figs. 39 - 45. 39 - 42 Polyboea sp. cf. zonaformis Zhang, Zhu & Song 2004 from Muang Sing (L 3). 39 - 40 Epigynum, ventral view (variation); 41 internal duct system, dorsal view; 42 schematic course of internal duct system, dorsal view; 43 female carrying egg-sac (in original habitat). 44 - 46 Thalassius sp. cf. paralbocinctus Zhang, Zhu & Song 2004 from Vang Vieng (L 23). 44 Epigynum, ventral view; 45 internal duct system, dorsal view (left side partly broken off); 46 female (in original habitat, in foliage about 1 m above ground), ab — accessory bulb, am — anterior margin of lateral lobe, ca — carina, fo — fossa (pits on carina), hs — head of spermathecae, ss — slit sense