Agnostida

Pseudagnostus josepha

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Diplagnostidae

Cambrian, Miaolingian Guzhangian to Furongian PaibianHunan, Zhejiang; North America

Pseudagnostus josepha — photo 1 — Photo 1 · Syntype AMNH311 (USA; Shergold 1977) Illustrated specimens (Hunan; Peng Shanchi 2020) Illustrated specimens (Zhejiang; Lu Yanhao Illustrated specimens (Zhejiang; Peng Complete dorsal shield et al. 1989) Shanchi et al. 2016) (Hunan; Lixia)

Pseudagnostus josepha — photo 2 — Photo 2 · Syntype AMNH311 (USA; Shergold 1977) Illustrated specimens (Hunan; Peng Shanchi 2020) Illustrated specimens (Zhejiang; Lu Yanhao Illustrated specimens (Zhejiang; Peng Complete dorsal shield et al. 1989) Shanchi et al. 2016) (Hunan; Lixia)

Pseudagnostus josepha — photo 3 — Photo 3 · Syntype AMNH311 (USA; Shergold 1977) Illustrated specimens (Hunan; Peng Shanchi 2020) Illustrated specimens (Zhejiang; Lu Yanhao Illustrated specimens (Zhejiang; Peng Complete dorsal shield et al. 1989) Shanchi et al. 2016) (Hunan; Lixia)

Pseudagnostus josepha — photo 4 — Photo 4 · Syntype AMNH311 (USA; Shergold 1977) Illustrated specimens (Hunan; Peng Shanchi 2020) Illustrated specimens (Zhejiang; Lu Yanhao Illustrated specimens (Zhejiang; Peng Complete dorsal shield et al. 1989) Shanchi et al. 2016) (Hunan; Lixia)

Pseudagnostus josepha — photo 5 — Photo 5 · Syntype AMNH311 (USA; Shergold 1977) Illustrated specimens (Hunan; Peng Shanchi 2020) Illustrated specimens (Zhejiang; Lu Yanhao Illustrated specimens (Zhejiang; Peng Complete dorsal shield et al. 1989) Shanchi et al. 2016) (Hunan; Lixia)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Diplagnostidae

Genus

Pseudagnostus Jaekel, 1909

Genus author

Jaekel O.

Genus etymology

pseud-, Greek, false; Agnostus, a trilobite genus name.

Species

P. josepha (Hall, 1863)

Species author

Hall J.

Species etymology

Joseph, a given name.

Age

Cambrian, Miaolingian Guzhangian to Furongian Paibian

Distribution

Hunan, Zhejiang; North America

Synonyms

Agnostus josepha; A. communis; A. neon; Pseudagnostus communis; P. primus; P. nuperus; P. neon; P. ampullatus; P. sericatus; P. curtare; P. margopronus; P. vigilax P. (P.) ampullatus; P. (P.) vigilax

Diagnosis

This species is very similar to Pseudagnostus idalis, the main differences being: the glabellar frontal lobe is semicircular to subtriangular with subacutely rounded anterior end, whereas in P. idalis it is subrectangular shaped, anterior end flatly rounded; the anterior axial ring of the pygidium is rectangular in this species, whereas it is slightly pentagonal in P. idalis.