Sinamma, Lin & Li, 2014

Cheng, Weihua, Ren, Lingshu, Tong, Yanfeng, Bian, Dongju & Li, Shuqiang, 2022, Two new species of the spider genus Sinamma Lin & Li, 2014 (Araneae, Tetrablemmidae) from Guangdong Province, China, Zootaxa 5091 (3), pp. 443-454 : 444

Key to known species of Sinamma

1 (0) Males.............................................................................................. 2

- Females............................................................................................. 4

2 (1) With pointed eye tubercles ( Lin & Li 2014: fig. 1E, G; Fig. 1G, H).............................................. 3

- Without pointed eye tubercles ( Fig. 5G, H)............................................. Sinamma yingae sp. nov.

3 (2) Palpal bulb quadrangular shape, embolus belt-shape ( Fig. 2A, B).......................... Sinamma quadrata sp. nov.

- Palpal bulb pyriform-shape, embolus thread-like shape ( Lin & Li 2014: fig. 2A, B)....... Sinamma oxycera Lin & Li, 2014

4 (1) Carapace with a pair of cephalic tubercles ( Lin & Li 2014: fig. 1F, H).................. Sinamma oxycera Lin & Li, 2014

- Carapace without cephalic tubercles ( Figs 1I; 5I)............................................................ 5

5 (4) Cephalic part slightly elevated, the highest point of carapace at posterior 2/3 ( Fig. 1F); posterior part of sternum strongly bulged ( Fig. 1F)....................................................................... Sinamma quadrata sp. nov.

- Cephalic part slightly sloping, the highest point of carapace at ocular area ( Fig. 5F); posterior part of sternum flat ( Fig. 5F).................................................................................. Sinamma yingae sp. nov.