Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Discina
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Discinoidea
Family:
Discinidae
Formal Genus Name and Reference:
Discina LAMARCK, 1819, p. 236
Type Species:
D. ostreoides, OD, =Crania striata SCHUMACHER, 1817, p. 102
Images
(Click to enlarge in a new window)
Fig. 41, $1 a-f$. *D. striata (Schumacher), Holocene, western Africa, $a$, dorsal valve exterior, $\\mathbf{X}$, $b$, detail of dorsal apex, x7.5$ (new), $c$, ventral valve exterior, Cape Palmas, USNM 5962, x3.3, d$, dorsal valve interior, $X 4.2, e$, ventral valve interior, $X 4.2, f$, lateral oblique view of ventral visceral area, Gambia, RMS Br 136372, X8.3 (new).
Synonyms
Crania
Geographic Distribution
western Africa
Age Range
Beginning Stage in Treatise Usage:
Holocene
Beginning International Stage:
Greenlandian
Fraction Up In Beginning Stage:
0
Beginning Date:
0.01
Ending Stage in Treatise Usage:
Holocene
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
0
Ending Date:
0
Description
Shell irregularly subcircular, biconvex to convexoconcave, ventral valve cemented to substrate, pedicle opening may be sealed in adults, both valves with subcentral apex, ornament of concentric growth lines and fine costellae, ventral interior with high, subtriangular median septum (probably attachment site of oblique internal muscle) extending short distance posteriorly of apex, partially closing pedicle opening, and almost forming pedicle tube, lophophore spirolophous. Holocene: western Africa.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Discinoidea
Family:
Discinidae
Formal Genus Name and Reference:
Discina LAMARCK, 1819, p. 236
Type Species:
D. ostreoides, OD, =Crania striata SCHUMACHER, 1817, p. 102
Images
(Click to enlarge in a new window)
Fig. 41, $1 a-f$. *D. striata (Schumacher), Holocene, western Africa, $a$, dorsal valve exterior, $\\mathbf{X}$, $b$, detail of dorsal apex, x7.5$ (new), $c$, ventral valve exterior, Cape Palmas, USNM 5962, x3.3, d$, dorsal valve interior, $X 4.2, e$, ventral valve interior, $X 4.2, f$, lateral oblique view of ventral visceral area, Gambia, RMS Br 136372, X8.3 (new).
Synonyms
Crania
Geographic Distribution
western Africa
Age Range
Beginning Stage in Treatise Usage:
Holocene
Beginning International Stage:
Greenlandian
Fraction Up In Beginning Stage:
0
Beginning Date:
0.01
Ending Stage in Treatise Usage:
Holocene
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
0
Ending Date:
0
Description
Shell irregularly subcircular, biconvex to convexoconcave, ventral valve cemented to substrate, pedicle opening may be sealed in adults, both valves with subcentral apex, ornament of concentric growth lines and fine costellae, ventral interior with high, subtriangular median septum (probably attachment site of oblique internal muscle) extending short distance posteriorly of apex, partially closing pedicle opening, and almost forming pedicle tube, lophophore spirolophous. Holocene: western Africa.