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Onniella
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Onniella Bancroft, 1928a, p. 55
Type Species:
O. broeggeri, OD
Images
(Click to enlarge in a new window)
Fig. 569, 1a-d. $* O$. broeggeri, Caradoc, Shropshire, $a, b$, ventral, dorsal views of conjoined valves, x1.5$, c, internal mold of ventral valve, x1.5$ (Cocks, new), $d$, internal mold of dorsal valve, x2.5$ (Hurst, 1979)., Fig. 569, 1e-g. O. reuschi, Caradoc, Shropshire, e, internal mold of ventral valve, x2, f$, internal mold of dorsal valve, $\\mathbf{X}_{\\mathbf{3}}$ (Cocks, new), $g$, rubber replica of dorsal interior, x1.5$ (Wright, 1965a).
Synonyms
Soudleyella, Bagnorthis
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Llanvirn)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
lower Silurian (Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Subquadrate, ventribiconvex valves, ventral interior with widely cordate ventral muscle scar and recessive dental plates, dorsal interior with undifferentiated, swollen, bilobed cardinal process, brachiophore plates widely divergent ventrally
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Onniella Bancroft, 1928a, p. 55
Type Species:
O. broeggeri, OD
Images
(Click to enlarge in a new window)
Fig. 569, 1a-d. $* O$. broeggeri, Caradoc, Shropshire, $a, b$, ventral, dorsal views of conjoined valves, x1.5$, c, internal mold of ventral valve, x1.5$ (Cocks, new), $d$, internal mold of dorsal valve, x2.5$ (Hurst, 1979)., Fig. 569, 1e-g. O. reuschi, Caradoc, Shropshire, e, internal mold of ventral valve, x2, f$, internal mold of dorsal valve, $\\mathbf{X}_{\\mathbf{3}}$ (Cocks, new), $g$, rubber replica of dorsal interior, x1.5$ (Wright, 1965a).
Synonyms
Soudleyella, Bagnorthis
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Llanvirn)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
lower Silurian (Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Subquadrate, ventribiconvex valves, ventral interior with widely cordate ventral muscle scar and recessive dental plates, dorsal interior with undifferentiated, swollen, bilobed cardinal process, brachiophore plates widely divergent ventrally