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Eotrigonia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Trigonioida
Superfamily:
Trigoniacea
Family:
Trigoniidae
Formal Genus Name and Reference:
Eotrigonia COSSMANN, 1912, p. 26
Type Species:
*Trigonia semiundulata M'Cov, 1866 =*T. subundulata JENKINS, 1865, p. 362, OD
Images
(Click to enlarge in a new window)
Fig. D68,5. *E. subundulata (Jenkins), Oligo., Australia, RV ext., X2 (161).
Synonyms
Geographic Distribution
Australia
Age Range
Beginning Stage in Treatise Usage:
L.Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Rather small, oblong, marginal carina obtuse, marked by rounded costa, area rather wide, bearing several radial costae with delicate serrations, flank ornamented with narrow costae which are slightly oblique to concentric, sloping down toward marginal carina
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Trigonioida
Superfamily:
Trigoniacea
Family:
Trigoniidae
Formal Genus Name and Reference:
Eotrigonia COSSMANN, 1912, p. 26
Type Species:
*Trigonia semiundulata M'Cov, 1866 =*T. subundulata JENKINS, 1865, p. 362, OD
Images
(Click to enlarge in a new window)
Fig. D68,5. *E. subundulata (Jenkins), Oligo., Australia, RV ext., X2 (161).
Synonyms
Geographic Distribution
Australia
Age Range
Beginning Stage in Treatise Usage:
L.Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Mio.
Ending International Stage:
Messinian
Fraction Up In Ending Stage:
100
Ending Date:
5.34
Description
Rather small, oblong, marginal carina obtuse, marked by rounded costa, area rather wide, bearing several radial costae with delicate serrations, flank ornamented with narrow costae which are slightly oblique to concentric, sloping down toward marginal carina