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Dalmanella
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Dalmanella Hall & CLARKE, 1892, p. 205
Type Species:
Orthis testudinaria DALMAN, 1828, p. 115, OD
Images
(Click to enlarge in a new window)
Fig. 566, 2a-f. * D. testudinaria (Dalman), Ashgill, Sweden, $a-e$, ventral, dorsal, posterior, anterior, lateral views of conjoined valves, X2.3, $f$, rubber replica of dorsal interior, $X_{4}$ (Williams & Wright, 1963).——Fig. 566, 2g, h. D. testudinaria ripae Mitchell, Ashgill, Girvan, Scotland, $g$, internal mold of dorsal valve, $X 4, h$, internal mold of ventral valve, $X_{4}$ (Harper, 1989). FIG. 566, 2i. D. multiplicata, Caradoc, Shropshire, internal mold of dorsal valve, x1.5$ (Cocks, new).
Synonyms
Wattsella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Arenig)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
lower Silurian (Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Subcircular, variably biconvex to ventribiconvex valves, ventral interior with dental fossettes, cordate muscle scar, and divergent dental plates, dorsal interior with brachiophore plates convergent onto median ridge, fulcral plates normally present
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Dalmanella Hall & CLARKE, 1892, p. 205
Type Species:
Orthis testudinaria DALMAN, 1828, p. 115, OD
Images
(Click to enlarge in a new window)
Fig. 566, 2a-f. * D. testudinaria (Dalman), Ashgill, Sweden, $a-e$, ventral, dorsal, posterior, anterior, lateral views of conjoined valves, X2.3, $f$, rubber replica of dorsal interior, $X_{4}$ (Williams & Wright, 1963).——Fig. 566, 2g, h. D. testudinaria ripae Mitchell, Ashgill, Girvan, Scotland, $g$, internal mold of dorsal valve, $X 4, h$, internal mold of ventral valve, $X_{4}$ (Harper, 1989). FIG. 566, 2i. D. multiplicata, Caradoc, Shropshire, internal mold of dorsal valve, x1.5$ (Cocks, new).
Synonyms
Wattsella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Arenig)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
lower Silurian (Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Subcircular, variably biconvex to ventribiconvex valves, ventral interior with dental fossettes, cordate muscle scar, and divergent dental plates, dorsal interior with brachiophore plates convergent onto median ridge, fulcral plates normally present