Sundalema Zhao & Li, 2020

Zhao, Huifeng, Li, Shuqiang & Zhang, Aibing, 2020, Taxonomic revision of Telemidae (Arachnida, Araneae) from East and Southeast Asia, ZooKeys 933, pp. 15-93 : 15

Genus Sundalema Zhao & Li gen. nov.

Type species.

Sundalema bonjol sp. nov. from West Sumatra Province, Indonesia.

Etymology.

The generic name is derived from “Sunda”, referring to Sundaland (distributional range of this genus), and “-lema” is a convention from the type genus of the family. Feminine in gender.

Diagnosis.

Females belonging to Sundalema gen. nov. can be distinguished from those of other genera by the following: a sclerotized and spiral receptacle (Fig. 24A ) (vs. unsclerotized or not spiral). Males belonging to Sundalema gen. nov. resemble species in the bailongensis -group by having a long embolus but can be distinguished by the embolus lacking a spiral ridge and being nearly L-shaped (Fig. 25B-D ) (vs. a distinct spiral ridge present on the nearly straight embolus).

Description.

Total length: 0.98-1.10 (male), 1.05-1.25 (female). Carapace 0.44- 0.58 long. Sternum light brown or milky white, with several sparse setae. Six vestigial eyes or ringed with black. Leg formula: 1-2-4-3, tibia I 0.90-1.27 long, leg glands belt-shaped (Fig. 1E ). For females, neck of receptacle membranous, receptacle spiral, its dorsal part sclerotized, coiled into 1.25 to 2.5 loops. For males, cymbial apophysis tiny, present meso-prolaterally; embolus long relative to bulb, nearly L-shaped, lacking spiral ridge. Abdomen blue or pale brown with several long setae.

Composition.

Sundalema acicularis comb. nov., S. anguina (Wang & Li, 2010) comb. nov., S. bonjol sp. nov., and S. khaorakkiat sp. nov.

Distribution.

Southeast Asia (Thailand and Indonesia, sites 9-12 in Fig. 33 ).

Comments.

The females of this genus are easily distinguished from all other genera, as their receptacles are long, spiral, and sclerotized; thus, a female has been chosen to represent the holotype.

Figures

Figure 1. Tibial glands on leg III of telemids in East and Southeast Asia (Zhuanlema gen. nov. is not included). A Telema guihua B Pinelema bailongensis C Mekonglema xinpingi comb. nov. D Siamlema changhai sp. nov. E Sundalema anguina comb. nov. F Apneumonella jacobsoni G Telemofila samosirensis.

Figure 24. Sundalema bonjol sp. nov., female holotype. A Endogyne, lateral view B habitus, dorsal view C habitus, ventral view. Scale bars: 0.05 mm (A), 0.2 mm (B, C).

Figure 25. Sundalema bonjol sp. nov., male paratype. A Habitus, dorsal view B embolus, apical view C palp, prolateral view D palp, retrolateral view. Scale bars: 0.2 mm (A), 0.05 mm (B), 0.1 mm (C, D).

Figure 33. Distribution records of telemid species in East and Southeast Asia (except Pinelema). 1 Apneumonella jacobsoni 2 Mekonglema bailang sp. nov. 3 M. kaorao sp. nov. 4 M. walayaku sp. nov. 5 M. xinpingi comb. nov. 6 M. yan sp. nov. 7 Siamlema changhai sp. nov. 8 S. suea sp. nov. 9 Sundalema acicularis comb. nov. 10 S. anguina comb. nov. 11 S. bonjol sp. nov. 12 S. khaorakkiat sp. nov. 13 Telema auricoma 14 T. guihua 15 T. nipponica 16 T. wunderlichi 17 Telemofila fabata comb. nov. 18 T. malaysiaensis comb. nov. 19 T. samosirensis 20 Zhuanlema peteri sp. nov.