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Sinoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Orthocerida
Superfamily:
Orthocerataceae
Family:
Orthoceratidae
Subfamily:
Michelinoceratinae
Formal Genus Name and Reference:
Sinoceras SHIMIZU & OBATA, 1935, p. 6
Type Species:
Orthocera! chinense FOORD, 1888, p. 100
Images
(Click to enlarge in a new window)
Fig. 158. *S. chinense (FOORD); long. sec., X0.5 (211).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Dev.
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Like Michelinoceras, but camerae shorter and septal necks nearly one-third camera length. Surface unknown in genoholotype, but in presumably conspecific forms, surface marked either by very fine irregular striae or by sinuous transverse growth bands, patterns of which are not known in detail. Connecting rings unknown, camerae apparently with thick episeptal and hyposeptal deposits. [Doubtfully distinct from Michelinoceras; stratigraphic derivation of type uncertain. FOORD regarded type-species as possibly Devonian; YU, SHIMIZU & OBATA, and KOBAYASHI record it from the Middle Ordovician. Content and status of Sinoceratidae SHIMIZU & OBATA uncertain pending better stratigraphic and morphologic data concerning certain topotypes of type-species.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Orthocerida
Superfamily:
Orthocerataceae
Family:
Orthoceratidae
Subfamily:
Michelinoceratinae
Formal Genus Name and Reference:
Sinoceras SHIMIZU & OBATA, 1935, p. 6
Type Species:
Orthocera! chinense FOORD, 1888, p. 100
Images
(Click to enlarge in a new window)
Fig. 158. *S. chinense (FOORD); long. sec., X0.5 (211).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Dev.
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Like Michelinoceras, but camerae shorter and septal necks nearly one-third camera length. Surface unknown in genoholotype, but in presumably conspecific forms, surface marked either by very fine irregular striae or by sinuous transverse growth bands, patterns of which are not known in detail. Connecting rings unknown, camerae apparently with thick episeptal and hyposeptal deposits. [Doubtfully distinct from Michelinoceras; stratigraphic derivation of type uncertain. FOORD regarded type-species as possibly Devonian; YU, SHIMIZU & OBATA, and KOBAYASHI record it from the Middle Ordovician. Content and status of Sinoceratidae SHIMIZU & OBATA uncertain pending better stratigraphic and morphologic data concerning certain topotypes of type-species.]