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Fimbrispirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Hysterolitidae
Formal Genus Name and Reference:
Fimbrispirifer COOPER, 1942, p. 231
Type Species:
Spirifer venustus HALL, 1860, p. 82, OD
Images
(Click to enlarge in a new window)
Fig. 1218, 1a-f. *F. venustus (Hall), lower Givetian, eastern USA, a-e, ventral, dorsal, anterior, posterior, and side views, f, ventral external mold showing concentric ornament, X1 (Jones & Boucot, 1983).
Synonyms
Geographic Distribution
eastern North America
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Emsian)
Beginning International Stage:
Emsian
Fraction Up In Beginning Stage:
0
Beginning Date:
410.51
Ending Stage in Treatise Usage:
Middle Devonian (lower Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
35
Ending Date:
383.06
Description
Medium to large, biconvex, equidimensional, ventral interarea curved, apsacline, fold, sulcus, and flanks with numerous bifurcating plications of U-shaped cross section and U-shaped interspaces, microornament of closely spaced, zigzag concentric lamellae with small spines along edges, strong dental plates present, crural plates present
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Hysterolitidae
Formal Genus Name and Reference:
Fimbrispirifer COOPER, 1942, p. 231
Type Species:
Spirifer venustus HALL, 1860, p. 82, OD
Images
(Click to enlarge in a new window)
Fig. 1218, 1a-f. *F. venustus (Hall), lower Givetian, eastern USA, a-e, ventral, dorsal, anterior, posterior, and side views, f, ventral external mold showing concentric ornament, X1 (Jones & Boucot, 1983).
Synonyms
Geographic Distribution
eastern North America
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Emsian)
Beginning International Stage:
Emsian
Fraction Up In Beginning Stage:
0
Beginning Date:
410.51
Ending Stage in Treatise Usage:
Middle Devonian (lower Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
35
Ending Date:
383.06
Description
Medium to large, biconvex, equidimensional, ventral interarea curved, apsacline, fold, sulcus, and flanks with numerous bifurcating plications of U-shaped cross section and U-shaped interspaces, microornament of closely spaced, zigzag concentric lamellae with small spines along edges, strong dental plates present, crural plates present