Agnostida

Valenagnostus imitans

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family uncertain

Cambrian, Miaolingian Drumian to GuzhangianHunan, Zhejiang; Australia

Valenagnostus imitans — photo 1 — Photo 1 · Cephalon holotype CPC 3635 (Australia; Öpik 1961) Illustrated specimens (Australia; Jago et al., 2004) Illustrated specimens (Hunan; Peng Complete dorsal shield Shanchi 2020) 3.5mm、4.5mm (Zhejiang; strongZJU)

Valenagnostus imitans — photo 2 — Photo 2 · Cephalon holotype CPC 3635 (Australia; Öpik 1961) Illustrated specimens (Australia; Jago et al., 2004) Illustrated specimens (Hunan; Peng Complete dorsal shield Shanchi 2020) 3.5mm、4.5mm (Zhejiang; strongZJU)

Valenagnostus imitans — photo 3 — Photo 3 · Cephalon holotype CPC 3635 (Australia; Öpik 1961) Illustrated specimens (Australia; Jago et al., 2004) Illustrated specimens (Hunan; Peng Complete dorsal shield Shanchi 2020) 3.5mm、4.5mm (Zhejiang; strongZJU)

Valenagnostus imitans — photo 4 — Photo 4 · Cephalon holotype CPC 3635 (Australia; Öpik 1961) Illustrated specimens (Australia; Jago et al., 2004) Illustrated specimens (Hunan; Peng Complete dorsal shield Shanchi 2020) 3.5mm、4.5mm (Zhejiang; strongZJU)

Valenagnostus imitans — photo 5 — Photo 5 · Cephalon holotype CPC 3635 (Australia; Öpik 1961) Illustrated specimens (Australia; Jago et al., 2004) Illustrated specimens (Hunan; Peng Complete dorsal shield Shanchi 2020) 3.5mm、4.5mm (Zhejiang; strongZJU)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family uncertain

Genus

Valenagnostus Jago, 1976

Genus author

Jago J. B.

Genus etymology

valen-, from the type locality, St. Valentines Peak, Tasmania, Australia; Agnostus, a trilobite genus name.

Species

V. imitans (Öpik, 1961)

Species author

Ö pik A. A.

Species etymology

imitans, Latin, imitating, copying, referring to the pygidial structure resembling and mutually imitating Hypagnostus hippalus.

Age

Cambrian, Miaolingian Drumian to Guzhangian

Distribution

Hunan, Zhejiang; Australia

Synonyms

Grandagnostus imitans; G. velaevis; G. evexus; Valenagnostus banksi; V. vrittoni; V. evexus

Diagnosis

Cephalon and pygidium nearly round. Furrows of the cephalon effaced, but with a very weak border furrow. Distal end of the pygidial inner lobe with a small terminal node, pygidial border broad and flat, widening backward.