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Ellesmeroceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Ellesmerocerida
Family:
Ellesmeroceratidae
Formal Genus Name and Reference:
Ellesmeroceras FOERSTE, 1921, p. 265
Type Species:
E. scheii, OD
Images
(Click to enlarge in a new window)
Fig. 71,3a. E. bridgei Flower, L.Ord. (L.Canad.), Alaska (Seward Penin.), enlarged sec. of ectosiphuncle (after 220a). -- Fig. 71,3b,c. *E. scheii, L.Ord., Can. (Ellesmere Is.), holotype, ventral and lat. views, x1.5 (204)
Synonyms
Ellesmereoceras, Ellesemroceras, Metaellesmeroceras, Metallesmeroceras
Geographic Distribution
N.Am. (widespread)-China (Manchur-ia)-USSR (Sib.)-?Australia (Queensl.)
Age Range
Beginning Stage in Treatise Usage:
L.Ord. (L.Canad., ?U.Canad.)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
L.Ord. (L.Canad., ?U.Canad.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Orthoconic, gradually expanded, generally compressed, sutures form shallow lateral lobe, siphuncle marginal, about 0.2 of conch diameter, septal necks orthochoanitic to loxochoanitic or hemichoanitic, connecting rings thick. [Type-species poorly known.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Ellesmerocerida
Family:
Ellesmeroceratidae
Formal Genus Name and Reference:
Ellesmeroceras FOERSTE, 1921, p. 265
Type Species:
E. scheii, OD
Images
(Click to enlarge in a new window)
Fig. 71,3a. E. bridgei Flower, L.Ord. (L.Canad.), Alaska (Seward Penin.), enlarged sec. of ectosiphuncle (after 220a). -- Fig. 71,3b,c. *E. scheii, L.Ord., Can. (Ellesmere Is.), holotype, ventral and lat. views, x1.5 (204)
Synonyms
Ellesmereoceras, Ellesemroceras, Metaellesmeroceras, Metallesmeroceras
Geographic Distribution
N.Am. (widespread)-China (Manchur-ia)-USSR (Sib.)-?Australia (Queensl.)
Age Range
Beginning Stage in Treatise Usage:
L.Ord. (L.Canad., ?U.Canad.)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
L.Ord. (L.Canad., ?U.Canad.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Orthoconic, gradually expanded, generally compressed, sutures form shallow lateral lobe, siphuncle marginal, about 0.2 of conch diameter, septal necks orthochoanitic to loxochoanitic or hemichoanitic, connecting rings thick. [Type-species poorly known.]