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.

Figures

FIGURE 1. Sinamma quadrata sp. nov., holotype male (A–C, G, H), female paratype (D–F, I). A–F. Habitus (A, D. Dorsal view; B, E. Ventral view; C, F. Lateral view, arow shows the bulge); G, I. Prosoma, anterior views; H. Prosoma, lateral view. Scale bars: 0.4 mm (A–I).

FIGURE 2. Sinamma quadrata sp. nov., male holotype, light (A–C) and SEM (D–I). A–F. Left palp (A, D. Prolateral view; B, E. Retrolateral view; C, F. Dorsal view); G–I. Distal part of bulb (G. Prolateral view; H. Retrolateral view; I. Dorsal view). Scales: 0.1 mm (A–F); 0.05 mm (G–I).

FIGURE 5. Sinamma yingae sp. nov., holotype male (A–C, G, H), female paratype (D–F, I). A–F. Habitus (A, D. Dorsal view; B, E. Ventral view; C, F. Lateral view); G, I. Prosoma, anterior views; H. Prosoma, lateral view. Scale bars: 0.4 mm (A–I).