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Amphidonte
Classification
Phylum:
Mollusca
Class:
None
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Ostreina (oysters)
Superfamily:
Ostreacea
Family:
Gryphaeidae
Subfamily:
Exogyrinae - TRIBE Exogyrini
Formal Genus Name and Reference:
Amphidonte Fischer de WALDHEIM, 1829, p. 31
Type Species:
A. humboldtii Fischer de Waldheim, 1829, pl. 1, fig. 1-4, SD FISCHER, 1886, p. 927
Images
(Click to enlarge in a new window)
Fig. J93,1. *A. humboldtii (Fischer de WaldhE1m), U.Cret.(Cenoman. ),USSR, la-c, LV ext., LV int., RV int., X0.6 (Fischer de WaldhE1m, 1837), ld,e, LV ext., RV int., X0.6 (Mirkamalov, 1964).
Synonyms
Amphidonta, Amphiodonta, Amphitonde, Amphydonta
Geographic Distribution
Cret., USSR, L.Cret. (up.Alb ), N.Am. (Texas)
Age Range
Beginning Stage in Treatise Usage:
Cret., USSR, or L.Cret. (up.Alb. , N.Am. (Texas)
Beginning International Stage:
Albian
Fraction Up In Beginning Stage:
50
Beginning Date:
106.85
Ending Stage in Treatise Usage:
Cret., USSR, or L.Cret. (up.Alb. , N.Am. (Texas)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Similar to Aetostreon but with many chomata, commonly along entire periphery of both valves and spiral keel that is not prominent, well rounded, and not built up as ridge above LV surface, its growth squamae less prominent and tending to be smoother
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
None
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Ostreina (oysters)
Superfamily:
Ostreacea
Family:
Gryphaeidae
Subfamily:
Exogyrinae - TRIBE Exogyrini
Formal Genus Name and Reference:
Amphidonte Fischer de WALDHEIM, 1829, p. 31
Type Species:
A. humboldtii Fischer de Waldheim, 1829, pl. 1, fig. 1-4, SD FISCHER, 1886, p. 927
Images
(Click to enlarge in a new window)
Fig. J93,1. *A. humboldtii (Fischer de WaldhE1m), U.Cret.(Cenoman. ),USSR, la-c, LV ext., LV int., RV int., X0.6 (Fischer de WaldhE1m, 1837), ld,e, LV ext., RV int., X0.6 (Mirkamalov, 1964).
Synonyms
Amphidonta, Amphiodonta, Amphitonde, Amphydonta
Geographic Distribution
Cret., USSR, L.Cret. (up.Alb ), N.Am. (Texas)
Age Range
Beginning Stage in Treatise Usage:
Cret., USSR, or L.Cret. (up.Alb. , N.Am. (Texas)
Beginning International Stage:
Albian
Fraction Up In Beginning Stage:
50
Beginning Date:
106.85
Ending Stage in Treatise Usage:
Cret., USSR, or L.Cret. (up.Alb. , N.Am. (Texas)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Similar to Aetostreon but with many chomata, commonly along entire periphery of both valves and spiral keel that is not prominent, well rounded, and not built up as ridge above LV surface, its growth squamae less prominent and tending to be smoother