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Pernopecten
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pectinacea (scallops and relatives)
Family:
Entoliidae
Formal Genus Name and Reference:
Pernopecten WINCHELL, 1865
Type Species:
Aviculopecten limaformis White & WHITFIELD, 1862, OD
Images
(Click to enlarge in a new window)
Fig. C71,2a. *P. limaformis (White & Whitfield), L.Miss.(Burlington), Iowa, RV int. mold, X1 (377), Fig. C71,2b,c. P. ohioensis (Newell), M.Penn.(Desmoines.), USA(Ohio), LV int., RV ext., X3 (663)
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
L.Miss.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Commonly, but not invariably, truncated behind, interior smooth or ribbed, with gaping front and rear margins, LV distinctly larger than right, byssal notch present in RV of juveniles, obsolete in adults, auricles of LV acuminate, inner ostracum with concentric crossed-lamellar structure, outer ostracum radially fibrous in LV and hexagonal prismatic in RV
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pectinacea (scallops and relatives)
Family:
Entoliidae
Formal Genus Name and Reference:
Pernopecten WINCHELL, 1865
Type Species:
Aviculopecten limaformis White & WHITFIELD, 1862, OD
Images
(Click to enlarge in a new window)
Fig. C71,2a. *P. limaformis (White & Whitfield), L.Miss.(Burlington), Iowa, RV int. mold, X1 (377), Fig. C71,2b,c. P. ohioensis (Newell), M.Penn.(Desmoines.), USA(Ohio), LV int., RV ext., X3 (663)
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
L.Miss.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Commonly, but not invariably, truncated behind, interior smooth or ribbed, with gaping front and rear margins, LV distinctly larger than right, byssal notch present in RV of juveniles, obsolete in adults, auricles of LV acuminate, inner ostracum with concentric crossed-lamellar structure, outer ostracum radially fibrous in LV and hexagonal prismatic in RV