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Eurydesma
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Ambonychiacea
Family:
Myalinidae
Subfamily:
Marine types
Formal Genus Name and Reference:
Eurydesma MORRIS, 1845
Type Species:
E. cordatum, OD
Images
(Click to enlarge in a new window)
Fig. C29,1. *E. cordatum, L.Perm., Australia(New S.Wales), 1a-c, RV beak, LV beak, RV ext., X0.7 (Etheridge & Dun, 1910).
Synonyms
Leiomyalina
Geographic Distribution
Australia-India-S. Afr.-Arg.
Age Range
Beginning Stage in Treatise Usage:
L.Perm.
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
L.Perm.
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Acline, heavy, smooth, obliquely oval as viewed laterally, ventricose, with deep, cordate lunule, outer ostracum relatively thick, more than 0.25 thickness of shell
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Ambonychiacea
Family:
Myalinidae
Subfamily:
Marine types
Formal Genus Name and Reference:
Eurydesma MORRIS, 1845
Type Species:
E. cordatum, OD
Images
(Click to enlarge in a new window)
Fig. C29,1. *E. cordatum, L.Perm., Australia(New S.Wales), 1a-c, RV beak, LV beak, RV ext., X0.7 (Etheridge & Dun, 1910).
Synonyms
Leiomyalina
Geographic Distribution
Australia-India-S. Afr.-Arg.
Age Range
Beginning Stage in Treatise Usage:
L.Perm.
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
L.Perm.
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Acline, heavy, smooth, obliquely oval as viewed laterally, ventricose, with deep, cordate lunule, outer ostracum relatively thick, more than 0.25 thickness of shell