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Timorhynchia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Cyclothyrididae
Formal Genus Name and Reference:
Timorhynchia AGER, 1968, p. 58
Type Species:
Halorella nimassica KRUMBECK, 1924, p. 10, OD
Images
(Click to enlarge in a new window)
Fig. 903, 2a-j. *T. nimassica (Krumbeck), Upper Triassic, Alianbata, eastern Timor, a-c, dorsal, lateral, anterior views, Derek Ager, personal collection, × 1.5, d-j, transverse serial sections, distances in mm from ventral umbo, 0.8, 1.1, 1.2, 1.6, 2.0, 2.6, 2.8, Derek Ager, personal collection (Ager, 1968).
Synonyms
Geographic Distribution
New Zealand, New Caledonia, Ladinian-lower Norian, Timor, China, ?Carnian, Norian
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic (Ladinian)
Beginning International Stage:
Ladinian
Fraction Up In Beginning Stage:
0
Beginning Date:
241.46
Ending Stage in Treatise Usage:
Upper Triassic , Ladinian-lower Norian, ?Carnian, Norian (Norian)
Ending International Stage:
Norian
Fraction Up In Ending Stage:
100
Ending Date:
205.74
Description
Small to medium, subtrigonal to transverse-oval to subpentagonal, equibiconvex to depressed dorsibiconvex, dorsal valve flattened or sulcate posteriorly, with uniplication broad, low, flattopped, but fold scarcely raised, multicostate throughout, costae low posteriorly, may become strong and angular anteriorly, beak small, incurved with submesothyrid foramen. Dental plates diverging, dorsal median septum high, long, supporting short septalium, canaliform crura projecting into ventral valve.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Cyclothyrididae
Formal Genus Name and Reference:
Timorhynchia AGER, 1968, p. 58
Type Species:
Halorella nimassica KRUMBECK, 1924, p. 10, OD
Images
(Click to enlarge in a new window)
Fig. 903, 2a-j. *T. nimassica (Krumbeck), Upper Triassic, Alianbata, eastern Timor, a-c, dorsal, lateral, anterior views, Derek Ager, personal collection, × 1.5, d-j, transverse serial sections, distances in mm from ventral umbo, 0.8, 1.1, 1.2, 1.6, 2.0, 2.6, 2.8, Derek Ager, personal collection (Ager, 1968).
Synonyms
Geographic Distribution
New Zealand, New Caledonia, Ladinian-lower Norian, Timor, China, ?Carnian, Norian
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic (Ladinian)
Beginning International Stage:
Ladinian
Fraction Up In Beginning Stage:
0
Beginning Date:
241.46
Ending Stage in Treatise Usage:
Upper Triassic , Ladinian-lower Norian, ?Carnian, Norian (Norian)
Ending International Stage:
Norian
Fraction Up In Ending Stage:
100
Ending Date:
205.74
Description
Small to medium, subtrigonal to transverse-oval to subpentagonal, equibiconvex to depressed dorsibiconvex, dorsal valve flattened or sulcate posteriorly, with uniplication broad, low, flattopped, but fold scarcely raised, multicostate throughout, costae low posteriorly, may become strong and angular anteriorly, beak small, incurved with submesothyrid foramen. Dental plates diverging, dorsal median septum high, long, supporting short septalium, canaliform crura projecting into ventral valve.