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Ivanothyris
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Ivanothyris HAVLÍČEK, 1957b, p. 438
Type Species:
Spirifer gibbosus BARRANDE, 1879, pl. 2, 7-8, OD
Images
(Click to enlarge in a new window)
Fig. 1210, 3 a-d .*I. gibbosa (Barrande), Lochkovian, Bohemia, ventral, dorsal, side, and anterior views, X1.5 (Havlíček, 1959)
Synonyms
Geographic Distribution
Europe, Kazakhstan, western Siberian plain
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Medium size, strongly biconvex, transversely oval, ventral interarea curved, low, apsacline to orthocline, fold and sulcus smooth, flanks with few strong, simple plications, growth lamellae closely spaced, dental plates and ventral median septum buried in umbonal callus, crural plates obsolete
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Ivanothyris HAVLÍČEK, 1957b, p. 438
Type Species:
Spirifer gibbosus BARRANDE, 1879, pl. 2, 7-8, OD
Images
(Click to enlarge in a new window)
Fig. 1210, 3 a-d .*I. gibbosa (Barrande), Lochkovian, Bohemia, ventral, dorsal, side, and anterior views, X1.5 (Havlíček, 1959)
Synonyms
Geographic Distribution
Europe, Kazakhstan, western Siberian plain
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Medium size, strongly biconvex, transversely oval, ventral interarea curved, low, apsacline to orthocline, fold and sulcus smooth, flanks with few strong, simple plications, growth lamellae closely spaced, dental plates and ventral median septum buried in umbonal callus, crural plates obsolete