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Wimanella
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Orthoidea
Family:
Bohemiellidae
Formal Genus Name and Reference:
Wimanella WALCOTT, 1908, p. 98
Type Species:
W. simplex, OD
Images
(Click to enlarge in a new window)
Fig. 528, 4a-d. *W. simplex, Middle Cambrian, Montana, $a$, internal mold of ventral valve, x2, b$, ventral exterior, x3}$, c, internal mold of ventral valve, $X_{3}$, $d$, internal mold of dorsal valve, $X_{2}$ (Bell, 1941).
Synonyms
Geographic Distribution
North America, Australia, Siberian Platform, eastern China
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian
Beginning International Stage:
Fortunian
Fraction Up In Beginning Stage:
0
Beginning Date:
538.8
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
100
Ending Date:
497
Description
A genus of brachiopods with a subquadrate shape and variable cardinal extremities, biconvex, unisulcate to rectimarginate, and smooth except for concentric growth lines and sporadic, low radial ridges. The internal margins are finely striate. Teeth apices are near the delthyrial boundary of transverse teeth ridges. The ventral diductor scars are elongate, separated posteriorly by a low median ridge that bifurcates anteriorly to contain a medial adductor scar. The cardinal process is absent or rudimentary. Found in the Lower Cambrian to Middle Cambrian of North America, Australia, Siberian Platform, and eastern China.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Orthoidea
Family:
Bohemiellidae
Formal Genus Name and Reference:
Wimanella WALCOTT, 1908, p. 98
Type Species:
W. simplex, OD
Images
(Click to enlarge in a new window)
Fig. 528, 4a-d. *W. simplex, Middle Cambrian, Montana, $a$, internal mold of ventral valve, x2, b$, ventral exterior, x3}$, c, internal mold of ventral valve, $X_{3}$, $d$, internal mold of dorsal valve, $X_{2}$ (Bell, 1941).
Synonyms
Geographic Distribution
North America, Australia, Siberian Platform, eastern China
Age Range
Beginning Stage in Treatise Usage:
Lower Cambrian
Beginning International Stage:
Fortunian
Fraction Up In Beginning Stage:
0
Beginning Date:
538.8
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
100
Ending Date:
497
Description
A genus of brachiopods with a subquadrate shape and variable cardinal extremities, biconvex, unisulcate to rectimarginate, and smooth except for concentric growth lines and sporadic, low radial ridges. The internal margins are finely striate. Teeth apices are near the delthyrial boundary of transverse teeth ridges. The ventral diductor scars are elongate, separated posteriorly by a low median ridge that bifurcates anteriorly to contain a medial adductor scar. The cardinal process is absent or rudimentary. Found in the Lower Cambrian to Middle Cambrian of North America, Australia, Siberian Platform, and eastern China.