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Eocoelia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchotrematoidea
Family:
Leptocoeliidae
Formal Genus Name and Reference:
Eocoelia NIKIFOROVA, 1961, p. 252
Type Species:
Atrypa hemisphaerica J. de C. SOWERBY, 1839, p. 637, OD
Images
(Click to enlarge in a new window)
Fig. 733, 3a-g. *E. hemisphaerica (Sowerby), upper Llandovery, Cowleigh Park Beds, Worcestershire, Ankerdine Hill, England, a, original illustration of Sowerby (1839), x1, b$, lectotype, ventral external mold of $a, \\times 2$ (Murchison, 1839), $c$, dorsal external mold, $d-e$, ventral internal mold and latex cast, $f$ $g$, dorsal internal mold and latex cast, x4$ (Ziegler, 1966b).
Synonyms
Geographic Distribution
Europe, Asia, North America, South America, Australia
Age Range
Beginning Stage in Treatise Usage:
lower Silurian (lower Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
middle Silurian (upper Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Subcircular to transversely elliptical outline with subbiconvex to planoconvex profile, delthyrium open, weak ventral fold and dorsal sulcus often evident, or merely weak narrow trough on dorsal valve, anterior commissure rectimarginate, costae simple, strong, rounded, extending from beaks, dental plates short to absent, teeth arising from posterior valve walls and bear fossettes on median face, muscle scars not impressed, dorsal valve with short, robust socket plates bounding deep, divergent sockets, broad, low median ridge reflecting exterior trough, muscle field not impressed, costae strongly reflected internally, cardinal process rare to absent
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchotrematoidea
Family:
Leptocoeliidae
Formal Genus Name and Reference:
Eocoelia NIKIFOROVA, 1961, p. 252
Type Species:
Atrypa hemisphaerica J. de C. SOWERBY, 1839, p. 637, OD
Images
(Click to enlarge in a new window)
Fig. 733, 3a-g. *E. hemisphaerica (Sowerby), upper Llandovery, Cowleigh Park Beds, Worcestershire, Ankerdine Hill, England, a, original illustration of Sowerby (1839), x1, b$, lectotype, ventral external mold of $a, \\times 2$ (Murchison, 1839), $c$, dorsal external mold, $d-e$, ventral internal mold and latex cast, $f$ $g$, dorsal internal mold and latex cast, x4$ (Ziegler, 1966b).
Synonyms
Geographic Distribution
Europe, Asia, North America, South America, Australia
Age Range
Beginning Stage in Treatise Usage:
lower Silurian (lower Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
middle Silurian (upper Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Subcircular to transversely elliptical outline with subbiconvex to planoconvex profile, delthyrium open, weak ventral fold and dorsal sulcus often evident, or merely weak narrow trough on dorsal valve, anterior commissure rectimarginate, costae simple, strong, rounded, extending from beaks, dental plates short to absent, teeth arising from posterior valve walls and bear fossettes on median face, muscle scars not impressed, dorsal valve with short, robust socket plates bounding deep, divergent sockets, broad, low median ridge reflecting exterior trough, muscle field not impressed, costae strongly reflected internally, cardinal process rare to absent