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Borealispirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Acrospiriferidae
Formal Genus Name and Reference:
Borealispirifer Hou & Su in Su & HOU, 1993, p. 140
Type Species:
Eospirifer (Multispirifer) bifurcatus KAPLUN, 1961, p. 91, OD
Images
(Click to enlarge in a new window)
Fig. 1224 a-d .* B. bifurcatus (KAPLUN); a, holotype, ventral valve internal mold; b–c, dorsal valve internal mold, ventral valve exterior, ×1; d, microornament, ×8 (Kaplun, 1961).
Synonyms
Geographic Distribution
Kazakhstan
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (lower Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
33
Ending Date:
405.16
Description
Medium to large, biconvex, flattened ventrally, with slightly acute cardinal angles, ventral interarea low, fold and sulcus broad, not sharply bounded, plicate, flanks with bifurcating plications, dental plates intrasinal, with some umbonal callus, ctenophoridium and vestigial crural plates present
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Acrospiriferidae
Formal Genus Name and Reference:
Borealispirifer Hou & Su in Su & HOU, 1993, p. 140
Type Species:
Eospirifer (Multispirifer) bifurcatus KAPLUN, 1961, p. 91, OD
Images
(Click to enlarge in a new window)
Fig. 1224 a-d .* B. bifurcatus (KAPLUN); a, holotype, ventral valve internal mold; b–c, dorsal valve internal mold, ventral valve exterior, ×1; d, microornament, ×8 (Kaplun, 1961).
Synonyms
Geographic Distribution
Kazakhstan
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (lower Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
33
Ending Date:
405.16
Description
Medium to large, biconvex, flattened ventrally, with slightly acute cardinal angles, ventral interarea low, fold and sulcus broad, not sharply bounded, plicate, flanks with bifurcating plications, dental plates intrasinal, with some umbonal callus, ctenophoridium and vestigial crural plates present