Corynexochida

Ovatoryctocara sinensis

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Cambrian, Series 2, Stage 4Guizhou

Ovatoryctocara sinensis — photo 1 — Photo 1 · Yang Xinglian, J. Esteve Holotype GK6003 (Guizhou; Peng Reconstruction (Zhao et al., (Guizhou; Weidingzhong Shanchi 2020) 2015) Guchong) (Guizhou; Zhao et al., 2015)

Ovatoryctocara sinensis — photo 2 — Photo 2 · Yang Xinglian, J. Esteve Holotype GK6003 (Guizhou; Peng Reconstruction (Zhao et al., (Guizhou; Weidingzhong Shanchi 2020) 2015) Guchong) (Guizhou; Zhao et al., 2015)

Ovatoryctocara sinensis — photo 3 — Photo 3 · Yang Xinglian, J. Esteve Holotype GK6003 (Guizhou; Peng Reconstruction (Zhao et al., (Guizhou; Weidingzhong Shanchi 2020) 2015) Guchong) (Guizhou; Zhao et al., 2015)

Ovatoryctocara sinensis — photo 4 — Photo 4 · Yang Xinglian, J. Esteve Holotype GK6003 (Guizhou; Peng Reconstruction (Zhao et al., (Guizhou; Weidingzhong Shanchi 2020) 2015) Guchong) (Guizhou; Zhao et al., 2015)

Classification

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Genus

Ovatoryctocara Tchernysheva, 1962

Genus author

Tchernysheva N. E.

Genus etymology

ovat-, ovatus, Latin, oval; Oryctocara, a trilobite genus name

Species

O. sinensis Zhou, Yuan, Peng, Yang & Esteve, 2015

Species author

Zhao Yuanlong, Yuan Jinliang, Peng Jin,

Species etymology

sin-, Greek, China, Chinese, referring to its occurrence in China.

Age

Cambrian, Series 2, Stage 4

Distribution

Guizhou

Diagnosis

Isopygous proparian trilobite, axis narrow, surface ornamented with dense tubercles. Glabella long and narrow, distinctly expanding outward at midlength, reaching the anterior margin of the cephalon, its sides bounded and curved by the dorsal furrow; Curved; Three pairs of glabellar furrows, S1-S3 connected by shallow transverse and deep longitudinal furrows; Palpebral lobe small, located at the anterior part of the cranidium; Preocular and ocular areas of fixed cheek short and narrow, posterior part quite long and broad; free cheek narrow. Thorax of only 2 segments; pleural furrows narrow, pleural ribs bluntly rounded terminally. Pygidium semi-elliptical, as long as or slightly longer than the cephalon, axis of 7 rings.