Asaphida

Sinosaukia daliensis

Order Asaphida / Superfamily Dikelokephaloidea / Family Saukiidae

Jiangshanian (Furongian, Cambrian)Guangxi, Yunnan

Sinosaukia daliensis — photo 1 — Photo 1 · Holotype NIGPAS 152403 (Yunnan; Zhu Xuejian 2011) Guangxi specimens (Zhu Restoration (illustrated by Zong Ruiwen; Xuejian 2005) Zeng Guangchun et al. 2018) Complete dorsal exoskeleton (Guangxi; Guapi) Complete dorsal exoskeleton (Guangxi; Pengcheng Jianke) Complete dorsal exoskeleton (Guangxi; Edward)

Sinosaukia daliensis — photo 2 — Photo 2 · Holotype NIGPAS 152403 (Yunnan; Zhu Xuejian 2011) Guangxi specimens (Zhu Restoration (illustrated by Zong Ruiwen; Xuejian 2005) Zeng Guangchun et al. 2018) Complete dorsal exoskeleton (Guangxi; Guapi) Complete dorsal exoskeleton (Guangxi; Pengcheng Jianke) Complete dorsal exoskeleton (Guangxi; Edward)

Sinosaukia daliensis — photo 3 — Photo 3 · Holotype NIGPAS 152403 (Yunnan; Zhu Xuejian 2011) Guangxi specimens (Zhu Restoration (illustrated by Zong Ruiwen; Xuejian 2005) Zeng Guangchun et al. 2018) Complete dorsal exoskeleton (Guangxi; Guapi) Complete dorsal exoskeleton (Guangxi; Pengcheng Jianke) Complete dorsal exoskeleton (Guangxi; Edward)

Sinosaukia daliensis — photo 4 — Photo 4 · Holotype NIGPAS 152403 (Yunnan; Zhu Xuejian 2011) Guangxi specimens (Zhu Restoration (illustrated by Zong Ruiwen; Xuejian 2005) Zeng Guangchun et al. 2018) Complete dorsal exoskeleton (Guangxi; Guapi) Complete dorsal exoskeleton (Guangxi; Pengcheng Jianke) Complete dorsal exoskeleton (Guangxi; Edward)

Sinosaukia daliensis — photo 5 — Photo 5 · Holotype NIGPAS 152403 (Yunnan; Zhu Xuejian 2011) Guangxi specimens (Zhu Restoration (illustrated by Zong Ruiwen; Xuejian 2005) Zeng Guangchun et al. 2018) Complete dorsal exoskeleton (Guangxi; Guapi) Complete dorsal exoskeleton (Guangxi; Pengcheng Jianke) Complete dorsal exoskeleton (Guangxi; Edward)

Sinosaukia daliensis — photo 6 — Photo 6 · Holotype NIGPAS 152403 (Yunnan; Zhu Xuejian 2011) Guangxi specimens (Zhu Restoration (illustrated by Zong Ruiwen; Xuejian 2005) Zeng Guangchun et al. 2018) Complete dorsal exoskeleton (Guangxi; Guapi) Complete dorsal exoskeleton (Guangxi; Pengcheng Jianke) Complete dorsal exoskeleton (Guangxi; Edward)

Classification

Order Asaphida / Superfamily Dikelokephaloidea / Family Saukiidae

Genus

Sinosaukia Sun, 1935

Genus author

Sun Yunchu

Genus etymology

sin-, China; Saukia, a trilobite genus name

Species

S. daliensis Zhu in Zhu et al., 2011

Species author

Zhu Xuejian

Species etymology

Dali, Dali Village, Jingxi, Guangxi, where abundant fossils of this species occur

Age

Jiangshanian (Furongian, Cambrian)

Distribution

Guangxi, Yunnan

Diagnosis

Dorsal shield elongate-elliptical, smooth. Cephalon semicircular; glabella long-cylindrical, slightly constricted in the mid-anterior part; three pairs of glabellar furrows, S1 wide and deep, crossing the glabella and arched backward, S2 shallower, S3 faint; occipital furrow rather wide, slightly arched backward, occipital ring wide; dorsal furrows narrow and deep; palpebral lobes medium-sized, in the mid-posterior part of the cranidium; anterior branches of facial sutures slightly divergent forward, posterior branches oblique backward-outward; fixigenae very narrow; anterior border wide, protruding forward in a triangular shape; librigenae wide with long genal spines. Thorax of 11 segments, axis subequal in width to pleurae; pleural furrows wide and deep, pleural spines short. Pygidium semi-elliptical; axis of three rings plus a terminal piece, extending backward to the border; pleural furrows deep; border narrow.