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Cotteroceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Endoceratoidea
Order:
Endocerida
Family:
Proterocameroceratidae
Subfamily:
Genera known from more or less fragmentary conchs, including siphuncles, but mostly with missing apical end and body chamber
Formal Genus Name and Reference:
Cotteroceras Ulrich & FOERSTE, 1936
Type Species:
C. compressum, OD
Images
(Click to enlarge in a new window)
Fig. 107, 2. *C. compressum, Cotter Dol., USA (Mo.), 2a, b, lat. view, fragment with part of siphuncle and spiculum, x1 (204).
Synonyms
Geographic Distribution
N.Am. (Mo.-Minn.-Va.)-USSR (Sib.)
Age Range
Beginning Stage in Treatise Usage:
L.Ord. (M.Canad.)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
50
Beginning Date:
481.96
Ending Stage in Treatise Usage:
L.Ord. (U.Canad.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Straight, slender, compressed longicones, camerae very short, body chamber long, sutures straight, oblique, sloping adapically from dorsum to venter. Siphuncle large, marginal, structure of ectosiphuncle unknown, spiculum generally short, structure of endocones unknown.
References
Foerste, A. F., 1936, Silurian cephalopods of the Port Daniel area on Gaspé Peninsula, in eastern Canada: Denison Univ. Bull., Jour. Sci. Lab., v. 36, p. 21-92, pl. 1-22.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Endoceratoidea
Order:
Endocerida
Family:
Proterocameroceratidae
Subfamily:
Genera known from more or less fragmentary conchs, including siphuncles, but mostly with missing apical end and body chamber
Formal Genus Name and Reference:
Cotteroceras Ulrich & FOERSTE, 1936
Type Species:
C. compressum, OD
Images
(Click to enlarge in a new window)
Fig. 107, 2. *C. compressum, Cotter Dol., USA (Mo.), 2a, b, lat. view, fragment with part of siphuncle and spiculum, x1 (204).
Synonyms
Geographic Distribution
N.Am. (Mo.-Minn.-Va.)-USSR (Sib.)
Age Range
Beginning Stage in Treatise Usage:
L.Ord. (M.Canad.)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
50
Beginning Date:
481.96
Ending Stage in Treatise Usage:
L.Ord. (U.Canad.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Straight, slender, compressed longicones, camerae very short, body chamber long, sutures straight, oblique, sloping adapically from dorsum to venter. Siphuncle large, marginal, structure of ectosiphuncle unknown, spiculum generally short, structure of endocones unknown.
References
Foerste, A. F., 1936, Silurian cephalopods of the Port Daniel area on Gaspé Peninsula, in eastern Canada: Denison Univ. Bull., Jour. Sci. Lab., v. 36, p. 21-92, pl. 1-22.