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Trochonema
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Pleurotomariina
Superfamily:
Trochonematacea
Family:
Trochonematidae
Formal Genus Name and Reference:
Trochonema SALTER, 1859
Type Species:
Pleurotomaria umbilicata HALL, 1847
Images
(Click to enlarge in a new window)
Fig. 139,7.*T. (T.) umbilicatum (HALL), M.Ord., Can.(Que.); X2.
Synonyms
Geographic Distribution
N.Am.-Eu.-NE.Asia
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:
L. Dev.
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Turbiniform to aciculate, with a major spiral angulation having channel within, later whorls disjunct in some forms
References
Salter, J. W., 1859, Figures and descriptions of Canadian organic remains: Geol. Survey Canada, decade 1, p. 1-46, pl. 1-10 (Montreal).
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Pleurotomariina
Superfamily:
Trochonematacea
Family:
Trochonematidae
Formal Genus Name and Reference:
Trochonema SALTER, 1859
Type Species:
Pleurotomaria umbilicata HALL, 1847
Images
(Click to enlarge in a new window)
Fig. 139,7.*T. (T.) umbilicatum (HALL), M.Ord., Can.(Que.); X2.
Synonyms
Geographic Distribution
N.Am.-Eu.-NE.Asia
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:
L. Dev.
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Turbiniform to aciculate, with a major spiral angulation having channel within, later whorls disjunct in some forms
References
Salter, J. W., 1859, Figures and descriptions of Canadian organic remains: Geol. Survey Canada, decade 1, p. 1-46, pl. 1-10 (Montreal).