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Aulacothyropsis
Classification
Phylum:
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Kingenoidea
Family:
Aulacothyropsidae
Formal Genus Name and Reference:
Aulacothyropsis DAGYS, 1959b, p. 99
Type Species:
Waldheimia (Aulacothyris) reflexa BITTNER, 1890, p. 258, OD
Images
(Click to enlarge in a new window)
Fig. 1457, 1a-ff. *A. reflexa (Bittner), Norian, northwestern Caucasus, a-c, dorsal, lateral, anterior views, X1.5 (Dagys, 1963)
Synonyms
Geographic Distribution
Alps, Balkans, Carpathians, Crimea, northwestern Caucasus, Pamirs, 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:
Upper Triassic
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Small, elongate-oval, planoconvex to ventribiconvex, mildly unisulcate, beak short, erect, with distinct beak ridges, foramen minute, mesothyrid. Dental plates parallel, pedicle collar fused laterally to dental plates. Cardinal process not differentiated, septalial trough shallow, with outer hinge plates and crural bases lying in commissural plane, median septum long and thin, adult loop diploform with incipient detachment from septum, crural processes, dorsal and anterior edges of loop spinose.
References
Museum or Author Information
Classification
Phylum:
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Kingenoidea
Family:
Aulacothyropsidae
Formal Genus Name and Reference:
Aulacothyropsis DAGYS, 1959b, p. 99
Type Species:
Waldheimia (Aulacothyris) reflexa BITTNER, 1890, p. 258, OD
Images
(Click to enlarge in a new window)
Fig. 1457, 1a-ff. *A. reflexa (Bittner), Norian, northwestern Caucasus, a-c, dorsal, lateral, anterior views, X1.5 (Dagys, 1963)
Synonyms
Geographic Distribution
Alps, Balkans, Carpathians, Crimea, northwestern Caucasus, Pamirs, 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:
Upper Triassic
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Small, elongate-oval, planoconvex to ventribiconvex, mildly unisulcate, beak short, erect, with distinct beak ridges, foramen minute, mesothyrid. Dental plates parallel, pedicle collar fused laterally to dental plates. Cardinal process not differentiated, septalial trough shallow, with outer hinge plates and crural bases lying in commissural plane, median septum long and thin, adult loop diploform with incipient detachment from septum, crural processes, dorsal and anterior edges of loop spinose.