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Sedgwickia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Grammysiidae
Formal Genus Name and Reference:
Sedgwickia M'COY, 1844, p. 61
Type Species:
S. attenuata, SD STOLICZKA, 1871
Images
(Click to enlarge in a new window)
Fig. Fl,3. *S. attenuata, L.Carb., Marsden, Eng.; RV ext., X1 (M'Coy,1844)
Synonyms
Fuchsella
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Miss.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Elongate, more or less gibbous, anterior end rounded, posterior edge subtruncate, umbones prominent, placed well forward, slightly prosogyre; surface smooth or with low concentric ridges; defined ligament nymphs behind beaks; lunule, escutcheon and radial carinae lacking; hinge unknown, ?edentulous. [The relationship between Ihis genus and Myonia DANA, 1847, is uncertain.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Grammysiidae
Formal Genus Name and Reference:
Sedgwickia M'COY, 1844, p. 61
Type Species:
S. attenuata, SD STOLICZKA, 1871
Images
(Click to enlarge in a new window)
Fig. Fl,3. *S. attenuata, L.Carb., Marsden, Eng.; RV ext., X1 (M'Coy,1844)
Synonyms
Fuchsella
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Miss.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Elongate, more or less gibbous, anterior end rounded, posterior edge subtruncate, umbones prominent, placed well forward, slightly prosogyre; surface smooth or with low concentric ridges; defined ligament nymphs behind beaks; lunule, escutcheon and radial carinae lacking; hinge unknown, ?edentulous. [The relationship between Ihis genus and Myonia DANA, 1847, is uncertain.]