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Wilkingia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Pholadomyidae
Formal Genus Name and Reference:
Wilkingia WILSON, 1959, p. 401
Type Species:
Venus elliptica PHILLIPS, 1836, OD
Images
(Click to enlarge in a new window)
Fig. F16,1. *W. elliptica (PHILLIPS), L.Carb., Eng. (Redesdale) ; 1a,b, RV and cardinal views, X1 (Wilson, 1959).
Synonyms
Allorisma, ?Tellinomorpha
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 oval, subcylindrical at beaks, beaks placed 0.2 to 0.25 behind front margin, anterior and posterior extremities rounded, dorsal and ventral margins subparallel, broad, shallow sulcus extending ventrally from umbones across anterior half of valves, escutcheon and elongate lunule present, umbonal ridge broad and poorly developed, valves marked by regular broad and rounded concentric folds; radial rows of small papilli present, especially on posterodorsal area; adductor scars shallow, without buttresses; shallow pallial sinus present; with or without narrow posterior gape; ligament nymphs short and weak; hinge edentulous.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Pholadomyidae
Formal Genus Name and Reference:
Wilkingia WILSON, 1959, p. 401
Type Species:
Venus elliptica PHILLIPS, 1836, OD
Images
(Click to enlarge in a new window)
Fig. F16,1. *W. elliptica (PHILLIPS), L.Carb., Eng. (Redesdale) ; 1a,b, RV and cardinal views, X1 (Wilson, 1959).
Synonyms
Allorisma, ?Tellinomorpha
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 oval, subcylindrical at beaks, beaks placed 0.2 to 0.25 behind front margin, anterior and posterior extremities rounded, dorsal and ventral margins subparallel, broad, shallow sulcus extending ventrally from umbones across anterior half of valves, escutcheon and elongate lunule present, umbonal ridge broad and poorly developed, valves marked by regular broad and rounded concentric folds; radial rows of small papilli present, especially on posterodorsal area; adductor scars shallow, without buttresses; shallow pallial sinus present; with or without narrow posterior gape; ligament nymphs short and weak; hinge edentulous.