Illaenus sp. 2

Figs 14.8, 11

1917 Illaenus aff. schmidti Nieszkowski 1857; Reed p. 46–7, pl. 7, figs 12,13.

Material. Incomplete cranidium, Fig. 14.11 (Reed, 1917, pl. 7, fig. 13), GSI 11902; pygidium, Fig. 14.8 (Reed, 1917, pl. 7, fig. 12), GSI 11901. Both specimens from Shihtien Formation (Darriwilian) at Banpo Village in Shidian County, Baoshan Prefecture, western Yunnan.

Remarks. This species is represented by an apparently crushed incomplete internal mould of a cranidium, and a pygidium in relief, also lacking the dorsal cuticle. The pygidium has broken to show the upper surface of the doublure, which is wide (sag.) and extends as far as the tip of the acutely triangular, short pygidial axis. A patch of the lower surface of the doublure with terrace ridges is also visible. This structure is typical of Illaenus sensu stricto, but little more can be said about this species.