Corynexochida

Prochuangia licinispinata

Order Corynexochida / Suborder Leiostegiina / Superfamily Leiostegioidea / Family Leiostegiidae

Paibian (Furongian, Cambrian)Hunan, Liaoning

Prochuangia licinispinata — photo 1 — Photo 1 · Literature specimen (Hunan; Peng 2020) Holotype NIGP 95196 (Hunan; Peng 2020) (Liaoning; Qian Yiyuan 1994) Complete dorsal exoskeleton (Hunan; Axi!)

Prochuangia licinispinata — photo 2 — Photo 2 · Literature specimen (Hunan; Peng 2020) Holotype NIGP 95196 (Hunan; Peng 2020) (Liaoning; Qian Yiyuan 1994) Complete dorsal exoskeleton (Hunan; Axi!)

Prochuangia licinispinata — photo 3 — Photo 3 · Literature specimen (Hunan; Peng 2020) Holotype NIGP 95196 (Hunan; Peng 2020) (Liaoning; Qian Yiyuan 1994) Complete dorsal exoskeleton (Hunan; Axi!)

Prochuangia licinispinata — photo 4 — Photo 4 · Literature specimen (Hunan; Peng 2020) Holotype NIGP 95196 (Hunan; Peng 2020) (Liaoning; Qian Yiyuan 1994) Complete dorsal exoskeleton (Hunan; Axi!)

Classification

Order Corynexochida / Suborder Leiostegiina / Superfamily Leiostegioidea / Family Leiostegiidae

Genus

Prochuangia Kobayashi, 1935

Genus author

Kobayashi T.

Genus etymology

pro-, before, forward; Chuangia, a trilobite genus name

Species

P. licinispinata Peng, 1992

Species author

Peng Shanchi

Species etymology

licin-, Latin, bent upward; spinata, spiny. Referring to the upward-curving pygidial spines

Age

Paibian (Furongian, Cambrian)

Distribution

Hunan, Liaoning

Synonyms

Prochuangia pustulosa

Diagnosis

Dorsal shield with sparse tubercles. Anterior margin of cranidium curved forward; glabella trapezoidal with 3 pairs of shallow glabellar furrows; occipital ring with a small median node; palpebral lobes medium-sized; eye ridges distinct; anterior border con vex as a wide sharp ridge; anterior branches of facial sutures parallel or slightly divergent; librigenae with short blunt genal spines. Thorax of 10 segments; axis narrower than pleurae; pleural furrows straight, narrow and deep, pleural spines short and pointed. Pygidium subtriangular apart from spines; axis long, with four rings and a terminal piece; first pleural ring extended backward-outward into a pair of long, strongly upturned pleural spines; border furrow rather deep, border medium-wide.

Remarks

The first complete dorsal exoskeleton of this species was discovered by Axi!, a trilobite fossil enthusiast.