Aegialia (Silluvia) kabaki Frolov, 2002

Frolov, Andrey V., 2008, New and little known species of the subgenus Aegialia (Silluvia) (Coleoptera, Scarabaeidae: Aphodiinae) from the Sino-Tibetan mountains, Zootaxa 1712, pp. 42-48 : 46

Aegialia (Silluvia) kabaki Frolov, 2002

Figs. 10–13

Material examined. China, Sichuan Province: WNW of Danba, 6.8 km S of Bianer, H~ 3485 m, 19.08.2004, Belousov & Kabak leg., 2 males; E Danba S Guanyongchang Vill., H~ 2990 m, 9.08.2004, Belousov & Kabak leg., 1 male and 1 female; E of Danba S of Guanyongchang Vill., H~ 3305 m, 10.08.2004, Belousov & Kabak leg., 1 male and 1 female; S Rilong, H~ 3355–3375 m, 27.08.2004, 1 male.

Remark. Examined specimens show considerable variability in the shape of the pronotum, which vary from rounded in posterior angles ( Fig. 10 ) through excavated in the angles ( Fig. 11 ) to somewhat undulate lateral margins and excavated posterior angles ( Fig. 12 ). These specimens, however, do not differ in other characters including shape of parameres and internal sac sclerites, (i.e. in characters distinctive for Silluvia species). I believe these forms are conspecific with the type specimen of A. kabaki , and intermediate forms will be found in future. Similar and even greater variability of the shape of pronotum is also known in A. (Psammoporus) kamtschatica Motschulsky, 1860 , a species widely distributed in the northern Palaearctic Region.

Aegialia kabaki is currently known from a few localities in a relatively small region in Central Sichuan Province ( Fig. 13 ) and may be endemic to this region.

Figures

FIGURE 13. Distribution map of the four species of Silluvia discussed in this paper.

FIGURES 10 – 12. Aegialia (Silluvia) kabaki head and pronotum, Fig. 10. Specimen from WSW of Lixian. Fig. 11. Specimen from 6.8 km S of Bianer. Fig. 12. Specimen from S of Rilong.