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Abra
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Tellinacea
Family:
Semelidae
Formal Genus Name and Reference:
Abra LAMARCK, 1818 (ex LEACH MS) (proposed in synonymy)
Type Species:
Maetra tenuis MONTAGU, 1818; SD HERRMANNSEN, 1846
Images
(Click to enlarge in a new window)
Fig. El20,1. *A. (A.) tenuis (Montagu), Rec., Eng., LV ext. showing siphons and foot, X1 (7c).
Synonyms
Habra, Orixa, Lutricularia, Abrina
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Thin, small resilium in a chondrophore that projects slightly into the shell cavity; pallial line partially confluent.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Tellinacea
Family:
Semelidae
Formal Genus Name and Reference:
Abra LAMARCK, 1818 (ex LEACH MS) (proposed in synonymy)
Type Species:
Maetra tenuis MONTAGU, 1818; SD HERRMANNSEN, 1846
Images
(Click to enlarge in a new window)
Fig. El20,1. *A. (A.) tenuis (Montagu), Rec., Eng., LV ext. showing siphons and foot, X1 (7c).
Synonyms
Habra, Orixa, Lutricularia, Abrina
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Thin, small resilium in a chondrophore that projects slightly into the shell cavity; pallial line partially confluent.