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Shouchangoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Pseudohaloritoidea
Family:
Pseudohaloritidae
Formal Genus Name and Reference:
Shouchangoceras Zhao & ZHENG, 1977, p. 226
Type Species:
S. shouchangense, OD
Images
(Click to enlarge in a new window)
Fig. 12, 1 a-b. *S. shouchangense, Dingjiashan Formation, western Zhejiang, a X 1, b, height at 11 mm , diameter at approximately 20 mm (Zhao & Zheng, 1977).-Fig. 12, 1c-e. S. subglobosum, Hutang Formation, eastern Jiangxi, X 1 (Zhao & Zheng, 1977).
Synonyms
Geographic Distribution
southern China (Zhejiang, Jiangxi, Jiangsu, Fujian, Hubei, Guangdong), USA (western Texas)
Age Range
Beginning Stage in Treatise Usage:
Permian (Guadalupian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Permian (Guadalupian)
Ending International Stage:
Capitanian
Fraction Up In Ending Stage:
100
Ending Date:
259.55
Description
Conch compressed and of moderate size (to 5 cm). Ultimate one-third of mature body chamber flat, forming weakly geniculate lateral profile. Mature aperture conspicuously constricted. Prominent transverse ribs form shallow dorsolateral sinus and deeper rounded sinus on venter, coarse longitudinal lirae produce reticulate sculpture in some growth stages. Siphuncle situated within flexure of dorsal lobe.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Pseudohaloritoidea
Family:
Pseudohaloritidae
Formal Genus Name and Reference:
Shouchangoceras Zhao & ZHENG, 1977, p. 226
Type Species:
S. shouchangense, OD
Images
(Click to enlarge in a new window)
Fig. 12, 1 a-b. *S. shouchangense, Dingjiashan Formation, western Zhejiang, a X 1, b, height at 11 mm , diameter at approximately 20 mm (Zhao & Zheng, 1977).-Fig. 12, 1c-e. S. subglobosum, Hutang Formation, eastern Jiangxi, X 1 (Zhao & Zheng, 1977).
Synonyms
Geographic Distribution
southern China (Zhejiang, Jiangxi, Jiangsu, Fujian, Hubei, Guangdong), USA (western Texas)
Age Range
Beginning Stage in Treatise Usage:
Permian (Guadalupian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Permian (Guadalupian)
Ending International Stage:
Capitanian
Fraction Up In Ending Stage:
100
Ending Date:
259.55
Description
Conch compressed and of moderate size (to 5 cm). Ultimate one-third of mature body chamber flat, forming weakly geniculate lateral profile. Mature aperture conspicuously constricted. Prominent transverse ribs form shallow dorsolateral sinus and deeper rounded sinus on venter, coarse longitudinal lirae produce reticulate sculpture in some growth stages. Siphuncle situated within flexure of dorsal lobe.