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Septimyalina
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Ambonychiacea
Family:
Myalinidae
Subfamily:
Marine types
Formal Genus Name and Reference:
Septimyalina NEWELL, 1942
Type Species:
Myalina perattenuata Meek & HAYDN, 1858, OD
Images
(Click to enlarge in a new window)
C30,1. *S. perattenuata (Meek & Hayden), U.Penn., USA (Kans.), LV ext., int., × 1 (666)
Synonyms
Geographic Distribution
USA, W.Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Carb.(Visean)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
0
Beginning Date:
346.73
Ending Stage in Treatise Usage:
L.Perm.(Wolfcamp.)
Ending International Stage:
Artinskian
Fraction Up In Ending Stage:
50
Ending Date:
286.91
Description
Prosocline, rhomboidal to falcate, or acline, thick-shelled myalines with slender extended beaks and obsolescent anterior lobe below each beak, both valves smooth or rugose, inequivalved
References
Newell, N. D., 1942, Late Paleozoic pelecypods: Mytilacea: Kansas State Geol. Survey, Publ., v. 10, no. 2, 115 p., 20 pl .
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:
Septimyalina NEWELL, 1942
Type Species:
Myalina perattenuata Meek & HAYDN, 1858, OD
Images
(Click to enlarge in a new window)
C30,1. *S. perattenuata (Meek & Hayden), U.Penn., USA (Kans.), LV ext., int., × 1 (666)
Synonyms
Geographic Distribution
USA, W.Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Carb.(Visean)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
0
Beginning Date:
346.73
Ending Stage in Treatise Usage:
L.Perm.(Wolfcamp.)
Ending International Stage:
Artinskian
Fraction Up In Ending Stage:
50
Ending Date:
286.91
Description
Prosocline, rhomboidal to falcate, or acline, thick-shelled myalines with slender extended beaks and obsolescent anterior lobe below each beak, both valves smooth or rugose, inequivalved
References
Newell, N. D., 1942, Late Paleozoic pelecypods: Mytilacea: Kansas State Geol. Survey, Publ., v. 10, no. 2, 115 p., 20 pl .