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Coelospira
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Anoplothecoidea
Family:
Anaplothecidae
Formal Genus Name and Reference:
Coelospira HALL, 1863b, p. 60
Type Species:
Leptocoelia concava HALL, 1857a, p. 107, OD
Images
(Click to enlarge in a new window)
Fig. 1097, 4a-d. $* C$. concava (Hall), Lochkovian, Albany County, New York, USA, $a$, lectotype, ventral view, AMNH 28456, $b$, ventral view, AMNH 28461, $c$, dorsal view, AMNH 28457, $d$, ventral valve internal mold, Gaspé, Lochkovian, USNM 156281, ×3 (Boucot & Johnson, 1967b).
Synonyms
Geographic Distribution
North America, Venezuela, Argentina, Turkey, northern China, Australia
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Small, ventribiconvex to planoconvex, longitudinally to transversely ovate shells with evenly convex profile, surface with numerous, relatively fine ribs, commonly median ventral ribs tending to be smaller than laterals, poorly developed growth lines commonly occurring at irregular intervals, few growth lamellae may develop anteriorly, anterior commissure rectimarginate to weakly sulcate, ventral diductor scars long, large, elliptical, broadening anteriorly, commonly divided by thin, bladelike median septum, platform elevating ventral muscle attachment area poorly developed or absent, cavity anterior to adductor scars much shallower than in Navispira, short, solid teeth, dental sockets well developed, inner socket ridges broadly divergent, may extend anterolaterally parallel to internal dorsal valve margin, cardinal process commonly bilobate to trilobate, a broad and posteriorly thick crest commonly dividing small, posterior, adductor scars, quickly narrowing anteriorly, separating broad triangular anterior adductor scars. Differs from Navispira in lack of prominent, carinate ventral midrib pair.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Anoplothecoidea
Family:
Anaplothecidae
Formal Genus Name and Reference:
Coelospira HALL, 1863b, p. 60
Type Species:
Leptocoelia concava HALL, 1857a, p. 107, OD
Images
(Click to enlarge in a new window)
Fig. 1097, 4a-d. $* C$. concava (Hall), Lochkovian, Albany County, New York, USA, $a$, lectotype, ventral view, AMNH 28456, $b$, ventral view, AMNH 28461, $c$, dorsal view, AMNH 28457, $d$, ventral valve internal mold, Gaspé, Lochkovian, USNM 156281, ×3 (Boucot & Johnson, 1967b).
Synonyms
Geographic Distribution
North America, Venezuela, Argentina, Turkey, northern China, Australia
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Small, ventribiconvex to planoconvex, longitudinally to transversely ovate shells with evenly convex profile, surface with numerous, relatively fine ribs, commonly median ventral ribs tending to be smaller than laterals, poorly developed growth lines commonly occurring at irregular intervals, few growth lamellae may develop anteriorly, anterior commissure rectimarginate to weakly sulcate, ventral diductor scars long, large, elliptical, broadening anteriorly, commonly divided by thin, bladelike median septum, platform elevating ventral muscle attachment area poorly developed or absent, cavity anterior to adductor scars much shallower than in Navispira, short, solid teeth, dental sockets well developed, inner socket ridges broadly divergent, may extend anterolaterally parallel to internal dorsal valve margin, cardinal process commonly bilobate to trilobate, a broad and posteriorly thick crest commonly dividing small, posterior, adductor scars, quickly narrowing anteriorly, separating broad triangular anterior adductor scars. Differs from Navispira in lack of prominent, carinate ventral midrib pair.