Corynexochida

Protoryctocephalus balangensis

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocephalinae

Cambrian, Series 2, Stage 4Guizhou

Protoryctocephalus balangensis — photo 1 — Photo 1 · Holotype GK1122 (Guizhou; Yuan Jinliang Longitudinally compressed type specimen of “P. elongatus” (Guizhou; left: Yuan Jinliang et al. 2002) et al., 2002; right: Peng Shanchi 2020) (Guizhou; Yuan Jinliang et al. 2002)

Protoryctocephalus balangensis — photo 2 — Photo 2 · Holotype GK1122 (Guizhou; Yuan Jinliang Longitudinally compressed type specimen of “P. elongatus” (Guizhou; left: Yuan Jinliang et al. 2002) et al., 2002; right: Peng Shanchi 2020) (Guizhou; Yuan Jinliang et al. 2002)

Protoryctocephalus balangensis — photo 3 — Photo 3 · Holotype GK1122 (Guizhou; Yuan Jinliang Longitudinally compressed type specimen of “P. elongatus” (Guizhou; left: Yuan Jinliang et al. 2002) et al., 2002; right: Peng Shanchi 2020) (Guizhou; Yuan Jinliang et al. 2002)

Classification

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocephalinae

Genus

Protoryctocephalus Chow in Lu et al., 1974

Genus author

Zhou Zhiyi

Genus etymology

prot-, originally、original;Oryctocephalus, trilobitegenus name, oryctocephalus

Species

P. balangensis Zhao & Yuan in Yuan et al., 2002

Species author

Zhao Yuanlong, Yuan Jinliang

Species etymology

Balang, Balang, Taijiang County, Guizhou, the locality

Age

Cambrian, Series 2, Stage 4

Distribution

Guizhou

Synonyms

Protoryctocephalus elongatus

Diagnosis

Very similar to P. wuxunensis, differing mainly in that, apart from S1 which is connected by a shallow transverse furrow, each pair of glabellar furrows is joined by a pair of shallow longitudinal furrows, Eye ridge relatively is weak, thorax of twelve segments, pleural spine slightly long.