Coillina Yin & Peng, 1998

Suzuki, Yuya, Aung, Mu Mu & Ono, Hirotsugu, 2021, First record of Coillina baka Ying & Peng, 1998 (Araneae: Gnaphosidae) from Myanmar, with a description of the previously unknown female, Zootaxa 4984 (1), pp. 274-280 : 275

Genus Coillina Yin & Peng, 1998

Type species by monotypy: Coillina baka Yin & Peng, 1998 .

Notes. This genus was originally characterized by having the retromargin of the chelicera with teeth separately standing (no keel or lamina), metatarsi of the hind legs without apical preening comb and the embolus of the male palp long and coiled ( Yin & Peng 1998). Although only one male specimen of the type species, C. baka , was used as material for establishing this genus, we were able to add the following characteristics on the basis of the newly collected material of both sexes obtained from Myanmar: anterior lateral spinnerets with seven or eight cylindrical spigots, male abdomen with a distinct dorsal scutum, male palpal tibia with a sclerotized dorsal edge but without retrolateral apophysis, male palpal femur with a strong denticle and a peculiarly rounded, thumb-shaped (or mushroom-shaped) apophysis ( Figs 11‒12 ), female genitalia with copulatory openings situated in the anterior part, long and spiraled insemination ducts and small, globular receptacles .

In the original diagnosis, Yin & Peng (1998) suggested that Apodrassodes Vellard, 1924 , Apophyllus Platnick & Shadab, 1984 , and Fedotovia Charitonov, 1946 were similar genera to Coillina . Murphy (2007) put Coillina in the Echemus group, which consists of 26 genera, although its taxonomic status was not specified. In the Echemus group in the sense of Murphy, several species of Synaphosus Platnick & Shadab, 1980 have a filiform or long needleshaped embolus of the male palp (but its distal part does not extend into the alveolus of cymbium as in Coillina ) and coiled or spiraled insemination ducts in the female genitalia. Of these, Synaphosus evertsi Ovtsharenko, Levy & Platnick, 1994 known from Ivory Coast, Indonesia (Bali) and Philippines (maybe including artificial distribution) has particularly no retrolateral tibial apophysis on the male palp, in common with C. baka . The relationship between Synaphosus and Coillina should be taxonomically verified.

Figures

FIGURES 9‒13. Coillina baka Yin & Peng, 1998 from Chin State, Myanmar (9–10 female, 11–13 male). 9 Epigyne, ventral. 10 Vulva, dorsal. 11–13 Left palp (11 ventral, with arrow indicating thumb-shaped, ventral apophysis; 12 dorsal, with arrow indicating prolateral denticle; 13 retrolateral).Abbreviations: Co—copulatory opening; Cy—cymbium; E—embolus; Eb—embolus base; Fd—fertilization duct; Id—insemination duct; Re—receptacle.