Proetida

Cyphaspides paradoxus

Order Proetida / Superfamily Aulacopleuroidea / Family Aulacopleuridae

Eifelian (Middle Devonian)Guangxi

Cyphaspides paradoxus — photo 1 — Photo 1 · Holotype IV6547 (Guangxi; Yi Yong'en et al. 1975) Colour photograph of the holotype IV6547 (Guangxi; Geological Museum of China 2016)

Cyphaspides paradoxus — photo 2 — Photo 2 · Holotype IV6547 (Guangxi; Yi Yong'en et al. 1975) Colour photograph of the holotype IV6547 (Guangxi; Geological Museum of China 2016)

Classification

Order Proetida / Superfamily Aulacopleuroidea / Family Aulacopleuridae

Genus

Cyphaspides Novák, 1890

Genus author

Novák O.

Genus etymology

cyph-, Greek, humped, curved; aspid-, Greek, shield

Species

C. paradoxus Yi & Hsiang, 1975

Species author

Yi Yong'en, Xiang Liwen

Species etymology

paradoxus, Latin, paradoxical, strange

Age

Eifelian (Middle Devonian)

Distribution

Guangxi

Diagnosis

Cephalon transversely wide with nearly straight posterior margin, bearing nodes of varying size; glabella strongly convex, subovate, distinctly widening forward, with a pair of extremely small basal lobes; preglabellar field absent; occipital ring narrow; dorsal furrows deep and distinct; cheeks wide and convex; eyes small, in the mid-posterior part of the cheeks. Thorax of 12 segments; axis narrow; pleurae transverse, pleural spines long, with small nodes at the knee-like bends. Pygidium sub- semicircular; axis conical with a postaxial ridge; pleural region faintly divided into 3-4 pairs of pleural segments extended into small spines, each with a node at the knee-like bend.