Corynexochida

Hunanocephalus ovalis

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Cheiruroidinae

Cambrian, Series 2, Stage 3Hunan, Hubei, Zhejiang, Guizhou

Hunanocephalus ovalis — photo 1 — Photo 1 · Type specimen (Hunan; Egorova et al., 1963) Ontogenetic sequence reconstruction (Dai et al., 2014) Figured specimen (Zhejiang; Ju Tianyin 1983) Complete dorsal shield (Guizhou; Lixia) Figured specimen (Hubei; Dai et al., 2014)

Hunanocephalus ovalis — photo 2 — Photo 2 · Type specimen (Hunan; Egorova et al., 1963) Ontogenetic sequence reconstruction (Dai et al., 2014) Figured specimen (Zhejiang; Ju Tianyin 1983) Complete dorsal shield (Guizhou; Lixia) Figured specimen (Hubei; Dai et al., 2014)

Hunanocephalus ovalis — photo 3 — Photo 3 · Type specimen (Hunan; Egorova et al., 1963) Ontogenetic sequence reconstruction (Dai et al., 2014) Figured specimen (Zhejiang; Ju Tianyin 1983) Complete dorsal shield (Guizhou; Lixia) Figured specimen (Hubei; Dai et al., 2014)

Hunanocephalus ovalis — photo 4 — Photo 4 · Type specimen (Hunan; Egorova et al., 1963) Ontogenetic sequence reconstruction (Dai et al., 2014) Figured specimen (Zhejiang; Ju Tianyin 1983) Complete dorsal shield (Guizhou; Lixia) Figured specimen (Hubei; Dai et al., 2014)

Hunanocephalus ovalis — photo 5 — Photo 5 · Type specimen (Hunan; Egorova et al., 1963) Ontogenetic sequence reconstruction (Dai et al., 2014) Figured specimen (Zhejiang; Ju Tianyin 1983) Complete dorsal shield (Guizhou; Lixia) Figured specimen (Hubei; Dai et al., 2014)

Classification

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Cheiruroidinae

Genus

Hunanocephalus Lee in Egorova et al., 1963

Genus author

Li Shangi

Genus etymology

Hunan, Hunan Province; -cephalus, head

Species

H. ovalis Lee in Egorova et al., 1963

Species author

Li Shangi

Species etymology

oval-, Latin, oval, egg-shaped

Age

Cambrian, Series 2, Stage 3

Distribution

Hunan, Hubei, Zhejiang, Guizhou

Diagnosis

Small trilobite. Dorsal shield oval. Cranidium subtrapezoidal, anterior border relatively straight; Glabella trapezoidal, three pairs of glabellar furrows; Eye ridge short; Palpebral lobe small; Fixed cheek broad; Free cheek extremely narrow, genal spine short. Thorax of 10 segments; axis broad; pleural furrows deep, pleural spines short. Pygidium small, subelliptical; axis broad, acutely rounded terminally.

Remarks

This species is the type species of Hunanocephalus.