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Meekella
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Orthotetida
Superfamily:
Orthotetoidea
Family:
Meekellidae
Formal Genus Name and Reference:
Meekella White & St. John, 1867, p. 120, Gegenella Li & GU, 1976, p. 236
Type Species:
Plicatula striatocostata COX, 1857, p. 568, OD
Images
(Click to enlarge in a new window)
Fig. 476, 2a-e. *M. striatocostata (Cox), Moscovian, Iowa, $a-c$, dorsal, ventral, lateral views of shell, $\\times_{1}$, $d$, detail of shell ornament, x5}$, e, posterior view of ventral valve, x2$ (new), Fig. 476, 2f, g. M. attenuata (Girty), Leonardian, Texas, $f$, oblique lateral view of cardinalia, $X_{4}, g$, ventral valve interior, X1.5 (Cooper & Grant, 1974)
Synonyms
Gegenella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Carboniferous
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Upper Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Medium sized, finely costellate by branching, ventral interarea high, procline to mainly apsacline, dental plates convergent onto floor of ventral valve and medial of rarely impressed, flabellate diductor scars, cardinal process usually moderately long, dorsal adductor scars variably impressed within distal ends of socket ridges, bilobed about low myophragm
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Orthotetida
Superfamily:
Orthotetoidea
Family:
Meekellidae
Formal Genus Name and Reference:
Meekella White & St. John, 1867, p. 120, Gegenella Li & GU, 1976, p. 236
Type Species:
Plicatula striatocostata COX, 1857, p. 568, OD
Images
(Click to enlarge in a new window)
Fig. 476, 2a-e. *M. striatocostata (Cox), Moscovian, Iowa, $a-c$, dorsal, ventral, lateral views of shell, $\\times_{1}$, $d$, detail of shell ornament, x5}$, e, posterior view of ventral valve, x2$ (new), Fig. 476, 2f, g. M. attenuata (Girty), Leonardian, Texas, $f$, oblique lateral view of cardinalia, $X_{4}, g$, ventral valve interior, X1.5 (Cooper & Grant, 1974)
Synonyms
Gegenella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Carboniferous
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Upper Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Medium sized, finely costellate by branching, ventral interarea high, procline to mainly apsacline, dental plates convergent onto floor of ventral valve and medial of rarely impressed, flabellate diductor scars, cardinal process usually moderately long, dorsal adductor scars variably impressed within distal ends of socket ridges, bilobed about low myophragm