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Tetractinella
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Athyridida
Suborder:
Athyrididina
Superfamily:
Athyridoidea
Family:
Diplospirellidae
Subfamily:
Tetractinellinae
Formal Genus Name and Reference:
Tetractinella BITTNER, 1890, p. 300
Type Species:
Terebratulites trigonellus von Schlotheim, 1820 in 1820-1823, p. 271, SD Hall & CLARKE, 1894, p. 977
Images
(Click to enlarge in a new window)
Fig. 1058a-x. * T. trigonella (von Schlotheim), a-e, dorsal, ventral, lateral, anterior, and posterior views, southern Tyrol, USNM 497420, X1.5 (new), f, lateral view of jugum, southern Tyrol, x4 (Bittner, 1890), g-x, transverse serial sections 1.0, 1.4, 1.8, 2.1, 2.4, 2.6, 2.8, 3.3, 3.8, 4.0, 4.2, 5.2, 5.9, 6.4, 6.9, 7.3, 7.7, 8.1 ~mm from ventral umbo, distance from ventral umbo to first section approximate, Caucasus, IGiG 394/273 (adapted from Dagys, 1974).
Synonyms
Geographic Distribution
Alps, Dinarids, Carpathians, Balkans, Caucasus, Pamir, ?China
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Middle Triassic
Ending International Stage:
Ladinian
Fraction Up In Ending Stage:
100
Ending Date:
237
Description
Shell commonly with 4 narrow, cusplike plications in corresponding position on each valve, separated by wide, flat interspaces, anterior commissure straight or slightly deflected dorsally
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Athyridida
Suborder:
Athyrididina
Superfamily:
Athyridoidea
Family:
Diplospirellidae
Subfamily:
Tetractinellinae
Formal Genus Name and Reference:
Tetractinella BITTNER, 1890, p. 300
Type Species:
Terebratulites trigonellus von Schlotheim, 1820 in 1820-1823, p. 271, SD Hall & CLARKE, 1894, p. 977
Images
(Click to enlarge in a new window)
Fig. 1058a-x. * T. trigonella (von Schlotheim), a-e, dorsal, ventral, lateral, anterior, and posterior views, southern Tyrol, USNM 497420, X1.5 (new), f, lateral view of jugum, southern Tyrol, x4 (Bittner, 1890), g-x, transverse serial sections 1.0, 1.4, 1.8, 2.1, 2.4, 2.6, 2.8, 3.3, 3.8, 4.0, 4.2, 5.2, 5.9, 6.4, 6.9, 7.3, 7.7, 8.1 ~mm from ventral umbo, distance from ventral umbo to first section approximate, Caucasus, IGiG 394/273 (adapted from Dagys, 1974).
Synonyms
Geographic Distribution
Alps, Dinarids, Carpathians, Balkans, Caucasus, Pamir, ?China
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Middle Triassic
Ending International Stage:
Ladinian
Fraction Up In Ending Stage:
100
Ending Date:
237
Description
Shell commonly with 4 narrow, cusplike plications in corresponding position on each valve, separated by wide, flat interspaces, anterior commissure straight or slightly deflected dorsally