Phacopida

Platycoryphe sinensis

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Homalonotidae

Hirnantian (Late Ordovician)Shaanxi, Guizhou, Chongqing

Platycoryphe sinensis — photo 1 — Photo 1 · Holotype 21608 (Shaanxi; Lu Yanhao et al. Pygidium and hypostome 1982) specimens (Shaanxi; Lu Yanhao et al. 1982) Literature specimen (Shaanxi; Lu Yanhao et al. 1982)

Platycoryphe sinensis — photo 2 — Photo 2 · Holotype 21608 (Shaanxi; Lu Yanhao et al. Pygidium and hypostome 1982) specimens (Shaanxi; Lu Yanhao et al. 1982) Literature specimen (Shaanxi; Lu Yanhao et al. 1982)

Platycoryphe sinensis — photo 3 — Photo 3 · Holotype 21608 (Shaanxi; Lu Yanhao et al. Pygidium and hypostome 1982) specimens (Shaanxi; Lu Yanhao et al. 1982) Literature specimen (Shaanxi; Lu Yanhao et al. 1982)

Platycoryphe sinensis — photo 4 — Photo 4 · Holotype 21608 (Shaanxi; Lu Yanhao et al. Pygidium and hypostome 1982) specimens (Shaanxi; Lu Yanhao et al. 1982) Literature specimen (Shaanxi; Lu Yanhao et al. 1982)

Platycoryphe sinensis — photo 5 — Photo 5 · Holotype 21608 (Shaanxi; Lu Yanhao et al. Pygidium and hypostome 1982) specimens (Shaanxi; Lu Yanhao et al. 1982) Literature specimen (Shaanxi; Lu Yanhao et al. 1982)

Platycoryphe sinensis — photo 6 — Photo 6 · Holotype 21608 (Shaanxi; Lu Yanhao et al. Pygidium and hypostome 1982) specimens (Shaanxi; Lu Yanhao et al. 1982) Literature specimen (Shaanxi; Lu Yanhao et al. 1982)

Classification

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Homalonotidae

Genus

Platycoryphe Foerste, 1919

Genus author

Foerste A. F.

Genus etymology

platy-, Greek, broad, wide; coryph-, Greek, crown, head

Species

P. sinensis (Lu, 1963)

Species author

Lu Yanhao

Species etymology

sin-, Greek, China; referring to the species occurring in China

Age

Hirnantian (Late Ordovician)

Distribution

Shaanxi, Guizhou, Chongqing

Synonyms

Homalonotus sinensis; Liangshanaspis sinensis

Diagnosis

Dorsal surface covered with nodes of varying size. Cephalon broad-elliptical; glabella truncate-conical or sub-urn-shaped; three pairs of glabellar furrows; eyes small; eye ridges extremely fine; fixigenae wide; librigenae narrow. Thorax of 13 segments; axis narrower than pleurae; pleural furrows narrow; articulating facets about 2/3 of the pleurae; pleural spines absent. Pygidium subtriangular to subrhomboidal; axis with 12-13 rings; pleural furrows narrow and deep, dividing into 7-8 segments.