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Rotaia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchotetradoidea
Family:
Tetracameridae
Formal Genus Name and Reference:
Rotaia Rzhonsnitskaia, 1959, p. 30, nom. nov. pro Welleria Rotai, 1941, p. 107, non Ulrich & BASSLER, 1923
Type Species:
Rhynchonella subtrigona Meek & WORTHEN, 1860, p. 451, OD
Images
(Click to enlarge in a new window)
Fig. 852, 2a-h. *R. subtrigona (Meek & Worthen), Mississippian, Osagean, Keokuk Limestone, North America, European Russia, Altai, Siberia, China, dorsal, ventral, anterior, and lateral views, × 1.5 (new), serial sections 1.6, 2.0, 2.2, 2.6, 3.0, 3.4, 4.2, 6.0, 7.8, 9.4 mm from anterior, × 1.8 (new)
Synonyms
Geographic Distribution
North America, European Russia, Altai, Siberia, China
Age Range
Beginning Stage in Treatise Usage:
Lower Carboniferous (lower Tournaisian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Lower Carboniferous (upper Tournaisian)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Large with subpentagonal to transversely subtrigonal outline and biconvex profile, vertical anterior and lateral margins truncated, Beak erect, Fold and sulcus broad, from umbones, anterior commissure uniplicate, low, dentate, Dental plates meeting as sessile spondylium, with high buttress plates, Septalium long, deep, wide, partly covered by inner hinge plates, hinge plates divided, without lateral supporting plates, dorsal median septum strong, to midlength, crural bases transversely ovate, crura short, straight, delicate, triangular in section
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchotetradoidea
Family:
Tetracameridae
Formal Genus Name and Reference:
Rotaia Rzhonsnitskaia, 1959, p. 30, nom. nov. pro Welleria Rotai, 1941, p. 107, non Ulrich & BASSLER, 1923
Type Species:
Rhynchonella subtrigona Meek & WORTHEN, 1860, p. 451, OD
Images
(Click to enlarge in a new window)
Fig. 852, 2a-h. *R. subtrigona (Meek & Worthen), Mississippian, Osagean, Keokuk Limestone, North America, European Russia, Altai, Siberia, China, dorsal, ventral, anterior, and lateral views, × 1.5 (new), serial sections 1.6, 2.0, 2.2, 2.6, 3.0, 3.4, 4.2, 6.0, 7.8, 9.4 mm from anterior, × 1.8 (new)
Synonyms
Geographic Distribution
North America, European Russia, Altai, Siberia, China
Age Range
Beginning Stage in Treatise Usage:
Lower Carboniferous (lower Tournaisian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Lower Carboniferous (upper Tournaisian)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Large with subpentagonal to transversely subtrigonal outline and biconvex profile, vertical anterior and lateral margins truncated, Beak erect, Fold and sulcus broad, from umbones, anterior commissure uniplicate, low, dentate, Dental plates meeting as sessile spondylium, with high buttress plates, Septalium long, deep, wide, partly covered by inner hinge plates, hinge plates divided, without lateral supporting plates, dorsal median septum strong, to midlength, crural bases transversely ovate, crura short, straight, delicate, triangular in section