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Meristina
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Meristelloidea
Family:
Meristellidae
Formal Genus Name and Reference:
Meristina HALL, 1867b, p. 299
Type Species:
Meristella maria Hall, 1863a, p. 212, SD Dall 1877, p. 49
Images
(Click to enlarge in a new window)
Fig. 1061, 1a-h. *M. maria (Hall), Waldron, Indiana, USA, $a-e$, lectotype, dorsal, ventral, lateral, anterior, and posterior views, AMNH 36616, Hall collection, x1.5$ (Alvarez & Brime, 2000), $f-g$, interior showing brachidium, and ventral valve internal mold, x1, h$, dorsal interior showing septalium, x2$ (Hall & Clarke, 1895).
Synonyms
Whitfieldia
Geographic Distribution
New Brunswick, Nova Scotia, Venezuela, Ireland, Novaya Zemlya, Siberia, Llandovery, North America, Podolia, Estonia, Lithuania, Bohemia, Gotland, United Kingdom, Ireland, southeastern Australia, Wenlock, Lithuania, northern China (Xinjiang, Heilongjiang), Ludlow, North America, Lower Devonian-Middle Devonian (Givetian)
Age Range
Beginning Stage in Treatise Usage:
Silurian (Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Middle Devonian (Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Externally and internally similar to Meristella but commonly with well-developed dental plates extending anteriorly as ridges, subparallel or slightly divergent, bounding a narrow, deep, and longitudinally striate muscle field, narrow and deep supported septalium, and jugal stem bifurcating into 2 short arms at its posteroventral end, tertiary layer may be present.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Meristelloidea
Family:
Meristellidae
Formal Genus Name and Reference:
Meristina HALL, 1867b, p. 299
Type Species:
Meristella maria Hall, 1863a, p. 212, SD Dall 1877, p. 49
Images
(Click to enlarge in a new window)
Fig. 1061, 1a-h. *M. maria (Hall), Waldron, Indiana, USA, $a-e$, lectotype, dorsal, ventral, lateral, anterior, and posterior views, AMNH 36616, Hall collection, x1.5$ (Alvarez & Brime, 2000), $f-g$, interior showing brachidium, and ventral valve internal mold, x1, h$, dorsal interior showing septalium, x2$ (Hall & Clarke, 1895).
Synonyms
Whitfieldia
Geographic Distribution
New Brunswick, Nova Scotia, Venezuela, Ireland, Novaya Zemlya, Siberia, Llandovery, North America, Podolia, Estonia, Lithuania, Bohemia, Gotland, United Kingdom, Ireland, southeastern Australia, Wenlock, Lithuania, northern China (Xinjiang, Heilongjiang), Ludlow, North America, Lower Devonian-Middle Devonian (Givetian)
Age Range
Beginning Stage in Treatise Usage:
Silurian (Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Middle Devonian (Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Externally and internally similar to Meristella but commonly with well-developed dental plates extending anteriorly as ridges, subparallel or slightly divergent, bounding a narrow, deep, and longitudinally striate muscle field, narrow and deep supported septalium, and jugal stem bifurcating into 2 short arms at its posteroventral end, tertiary layer may be present.