Agnostida

Proagnostus bulbus sinensis

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ammagnostidae

Cambrian, Miaolingian, GuzhangianHunan, Zhejiang, Qinghai, Xinjiang

Proagnostus bulbus sinensis — photo 1 — Photo 1 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Proagnostus bulbus sinensis — photo 2 — Photo 2 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Proagnostus bulbus sinensis — photo 3 — Photo 3 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Proagnostus bulbus sinensis — photo 4 — Photo 4 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Proagnostus bulbus sinensis — photo 5 — Photo 5 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Proagnostus bulbus sinensis — photo 6 — Photo 6 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Proagnostus bulbus sinensis — photo 7 — Photo 7 · Holotype specimen NIGP Illustrated specimens NIGP 123868, 123867, 123873, 123879 NIGP 161255, 161257 T1453, T1447 74494 (Hunan; Peng Shanchi 1987) (Hunan; Peng Shanchi 2020) (Qinghai; Lin Tianrui et al. (Xinjiang; Xiang Liwen et 2015) al. 1985) Complete (Hunan; Lin Tianrui 1991) dorsal shield (Zhejiang; Guodong)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ammagnostidae

Genus

Proagnostus Butts, 1926

Genus author

Butts C.

Genus etymology

pro-, before, forward; Agnostus, a trilobite genus name.

Species

P. bulbus sinensis (Peng, 1987)

Species author

Peng Shanchi

Species etymology

bulbus, Latin, sphere; sin-, Greek, China, referring to the occurrence of this subspecies in China.

Age

Cambrian, Miaolingian, Guzhangian

Distribution

Hunan, Zhejiang, Qinghai, Xinjiang

Synonyms

Agnostascus orientalis; Proagnostus bulbus orientalis; Agnostascus(Paragnostascus)orientalis; Agnostascus (Paragnostascus) sinensis

Diagnosis

Glabella cylindrical, frontal lobe subrectangular, anterior end rounded, terminal end of posterior lobe subacutely rounded; median node long, at the front of the posterior lobe; glabellar transverse furrow arched forward; preglabellar median furrow distinct. Pygidial axis stout and long, Terminal end close to the border furrow; median node large; a small node on the posterior part of the posterior axial ring; border furrow deep; with a pair of short posterolateral spines.

Remarks

Typical body length about 0.2-1.0 cm.