Isoxys from the Lower Cambrian Maotianshan Shale, Yunnan Province, South China. (a–d) Left and right lateral view (CFM 00047 and CFM 00169, respectively; both from Xiaolantan). (e–h) Fragment of anterior part with eye and part of the frontal appendage, left lateral view and detail of eye (CFM 00168; from Xiaoliantan). (i,j) Possible juvenile of I. auritus Jian in Luo et al. (1982) from Ercaicun, Lower Cambrian, Yunnan Province, China, right lateral view (YDKS 43). All light photographs. Midgut glands are in light grey. Scale bar 5 mm in (a,b,g–l), 1 mm in (c–f).