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Acanthospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Acanthospirifer MENAKOVA, 1964, p. 34
Type Species:
A. edelschteini MENAKOVA, 1964, p. 35, OD
Images
(Click to enlarge in a new window)
Fig. 1211, 4a-e. *A. edelschteini, upper Wenlock, Tajikistan, a-d, holotype, dorsal, ventral, lateral, and anterior views, X1, e, microornament, X4 (Menakova, 1964).
Synonyms
Geographic Distribution
Tajikistan (Zeravshan-Gissarsk area)
Age Range
Beginning Stage in Treatise Usage:
Silurian (upper Wenlock)
Beginning International Stage:
Homerian
Fraction Up In Beginning Stage:
50
Beginning Date:
428.68
Ending Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Ending International Stage:
Lochkovian
Fraction Up In Ending Stage:
100
Ending Date:
412.4
Description
Medium size, biconvex, equidimensional, ventral interarea low, curved, apsacline, fold with median groove anteriorly, flanks with few strong, simple or, uncommonly, bifurcating plications, growth lamellae closely spaced, dental plates thin, short, crural plates present.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Acanthospirifer MENAKOVA, 1964, p. 34
Type Species:
A. edelschteini MENAKOVA, 1964, p. 35, OD
Images
(Click to enlarge in a new window)
Fig. 1211, 4a-e. *A. edelschteini, upper Wenlock, Tajikistan, a-d, holotype, dorsal, ventral, lateral, and anterior views, X1, e, microornament, X4 (Menakova, 1964).
Synonyms
Geographic Distribution
Tajikistan (Zeravshan-Gissarsk area)
Age Range
Beginning Stage in Treatise Usage:
Silurian (upper Wenlock)
Beginning International Stage:
Homerian
Fraction Up In Beginning Stage:
50
Beginning Date:
428.68
Ending Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Ending International Stage:
Lochkovian
Fraction Up In Ending Stage:
100
Ending Date:
412.4
Description
Medium size, biconvex, equidimensional, ventral interarea low, curved, apsacline, fold with median groove anteriorly, flanks with few strong, simple or, uncommonly, bifurcating plications, growth lamellae closely spaced, dental plates thin, short, crural plates present.