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Mimella
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Plectorthoidea
Family:
Plectorthidae
Formal Genus Name and Reference:
Mimella COOPER, 1930, p. 375
Type Species:
Pionodema globosa WILLARD, 1928, p. 274, OD
Images
(Click to enlarge in a new window)
Fig. 550, 2a-f. *M. globosa (Willard), Caradoc, $a-d$, dorsal, ventral, lateral, anterior views of conjoined valves, Tennessee, $X_{1}, e$, ventral interior, Tennessee, x1}^{2}, f$, dorsal interior, Virginia, $\\mathbf{X}_{1}$ (Cooper, 1956)."
Synonyms
Sonculina
Geographic Distribution
Northern Hemisphere
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Similar to Hebertella but dorsibiconvex with obtuse cardinal extremities and without fila, dental plates recessive, bilobed ventral muscle scar consisting of long, subparallel impressed diductor scars not enclosing long, anteri-, fibrous shell, saccate mantle canal system
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Plectorthoidea
Family:
Plectorthidae
Formal Genus Name and Reference:
Mimella COOPER, 1930, p. 375
Type Species:
Pionodema globosa WILLARD, 1928, p. 274, OD
Images
(Click to enlarge in a new window)
Fig. 550, 2a-f. *M. globosa (Willard), Caradoc, $a-d$, dorsal, ventral, lateral, anterior views of conjoined valves, Tennessee, $X_{1}, e$, ventral interior, Tennessee, x1}^{2}, f$, dorsal interior, Virginia, $\\mathbf{X}_{1}$ (Cooper, 1956)."
Synonyms
Sonculina
Geographic Distribution
Northern Hemisphere
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Similar to Hebertella but dorsibiconvex with obtuse cardinal extremities and without fila, dental plates recessive, bilobed ventral muscle scar consisting of long, subparallel impressed diductor scars not enclosing long, anteri-, fibrous shell, saccate mantle canal system