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Promyalina
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Ambonychiacea
Family:
Myalinidae
Subfamily:
Marine types
Formal Genus Name and Reference:
Promyalina KITTLL, 1904
Type Species:
P. hindi, OD
Images
(Click to enlarge in a new window)
Fig. C29, 3. P. groenlandica (Newell), L.Trias., E.Greenl., LV int., ext., X2 (Newell, 1955).
Synonyms
Geographic Distribution
U.Perm., Yugo., L.Trias., cosmop.
Age Range
Beginning Stage in Treatise Usage:
U.Perm., L.Trias.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Perm., L.Trias.
Ending International Stage:
Olenekian
Fraction Up In Ending Stage:
100
Ending Date:
246.7
Description
Similar to Selenimyalina but with somewhat more prominent umbones and with single cardinal tooth in each valve, that of RV overlying tooth of LV
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:
Promyalina KITTLL, 1904
Type Species:
P. hindi, OD
Images
(Click to enlarge in a new window)
Fig. C29, 3. P. groenlandica (Newell), L.Trias., E.Greenl., LV int., ext., X2 (Newell, 1955).
Synonyms
Geographic Distribution
U.Perm., Yugo., L.Trias., cosmop.
Age Range
Beginning Stage in Treatise Usage:
U.Perm., L.Trias.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Perm., L.Trias.
Ending International Stage:
Olenekian
Fraction Up In Ending Stage:
100
Ending Date:
246.7
Description
Similar to Selenimyalina but with somewhat more prominent umbones and with single cardinal tooth in each valve, that of RV overlying tooth of LV