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Anabaria
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Atrypida
Superfamily:
Atrypoidea
Family:
Atrypinidae
Formal Genus Name and Reference:
Anabaria LOPUSHINSKAYA, 1965, p. 27
Type Species:
Catazyga rara NIKIFOROVA, 1961, p. 248, OD
Images
(Click to enlarge in a new window)
Fig. 964, 1a-g. *A. rara (Nikiforova), ?upper
Synonyms
Geographic Distribution
Siberia
Age Range
Beginning Stage in Treatise Usage:
Silurian (?upper Llandovery, Wenlock)
Beginning International Stage:
Telychian
Fraction Up In Beginning Stage:
0
Beginning Date:
438.59
Ending Stage in Treatise Usage:
Silurian (?upper Llandovery, Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Small to medium, rounded outline, biconvex-dorsibiconvex; orthocline-anacline area; small beak; apical foramen; minute deltidial plates; ribs fine, continuous, posterolateral shell flanks almost smooth; growth interruptions rare; moderately U-shaped, plicate commissure; interior with thin shell; small teeth with large lateral cavities; delicate hinge plates leading to feathery crura; dorsal spiralia with fewer than 8 whorls; jugal processes undescribed. [Differs from Clintonella in finer ribs, rounded, dorsibiconvex shape, and wide, U-shaped anterior fold, similar to Beitaia, except in coarser ribs, lower anterior fold.]
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Atrypida
Superfamily:
Atrypoidea
Family:
Atrypinidae
Formal Genus Name and Reference:
Anabaria LOPUSHINSKAYA, 1965, p. 27
Type Species:
Catazyga rara NIKIFOROVA, 1961, p. 248, OD
Images
(Click to enlarge in a new window)
Fig. 964, 1a-g. *A. rara (Nikiforova), ?upper
Synonyms
Geographic Distribution
Siberia
Age Range
Beginning Stage in Treatise Usage:
Silurian (?upper Llandovery, Wenlock)
Beginning International Stage:
Telychian
Fraction Up In Beginning Stage:
0
Beginning Date:
438.59
Ending Stage in Treatise Usage:
Silurian (?upper Llandovery, Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Small to medium, rounded outline, biconvex-dorsibiconvex; orthocline-anacline area; small beak; apical foramen; minute deltidial plates; ribs fine, continuous, posterolateral shell flanks almost smooth; growth interruptions rare; moderately U-shaped, plicate commissure; interior with thin shell; small teeth with large lateral cavities; delicate hinge plates leading to feathery crura; dorsal spiralia with fewer than 8 whorls; jugal processes undescribed. [Differs from Clintonella in finer ribs, rounded, dorsibiconvex shape, and wide, U-shaped anterior fold, similar to Beitaia, except in coarser ribs, lower anterior fold.]