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Heminajas
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Trigonioida
Superfamily:
Trigoniacea
Family:
Myophoriidae
Formal Genus Name and Reference:
Heminajas NEUMAYR, 1891, p. 789
Type Species:
Myophoria fissidentata WÖHRMANN, 1889, p. 213, M
Images
(Click to enlarge in a new window)
Fig. D63,10. *. fissidentata (Wöhrmann), U.Trias., Aus., 10a, *, LV ext. and int., * int., * (Arthaber, 1905, 1002)
Synonyms
Geographic Distribution
Eu. (Aus.-Hung.)
Age Range
Beginning Stage in Treatise Usage:
L.Trias.
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
U.Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Elongate-ovate, inequilateral, tapering and truncated posteriorly, marginal carina weak, surface smooth, left valve with widely triangular median tooth, grooved in some specimens, anterior tooth strong and well separated from margin, and posterior tooth thin and elongate, right valve with 3 well-defined teeth, most anterior of which is short and stout, median strong and grooved in some specimens, and posterior very thin and elongate, myophorous buttress present
References
Neumayr, Melchior, 1891, Beiträge zu einer morphologischen Eintheilung der Bivalven: Same, Denkschr., v. 58, p. 701-801.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Trigonioida
Superfamily:
Trigoniacea
Family:
Myophoriidae
Formal Genus Name and Reference:
Heminajas NEUMAYR, 1891, p. 789
Type Species:
Myophoria fissidentata WÖHRMANN, 1889, p. 213, M
Images
(Click to enlarge in a new window)
Fig. D63,10. *. fissidentata (Wöhrmann), U.Trias., Aus., 10a, *, LV ext. and int., * int., * (Arthaber, 1905, 1002)
Synonyms
Geographic Distribution
Eu. (Aus.-Hung.)
Age Range
Beginning Stage in Treatise Usage:
L.Trias.
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
U.Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Elongate-ovate, inequilateral, tapering and truncated posteriorly, marginal carina weak, surface smooth, left valve with widely triangular median tooth, grooved in some specimens, anterior tooth strong and well separated from margin, and posterior tooth thin and elongate, right valve with 3 well-defined teeth, most anterior of which is short and stout, median strong and grooved in some specimens, and posterior very thin and elongate, myophorous buttress present
References
Neumayr, Melchior, 1891, Beiträge zu einer morphologischen Eintheilung der Bivalven: Same, Denkschr., v. 58, p. 701-801.