Brachiopoda : Discinidae

DISCINIDAE


Sous-embranchement (subphylum) des Linguliformea Classe des Lingulata Ordre des Lingulida Super-famille des Discinoidea

Famille DISCINIDAE Gray, 1840
[Discinidae Gray, 1840, p. 155] [=Orbiculidae M’Coy, 1844, p. 103] [incl. Orbiculoideinae Schuchert & Levene, 1929, p. 13; Disciniscinae Schuchert & Levene, 1929, p. 13; Acrosaccidae Willard, 1928, p. 258] Dorsal valve with holoperipheral growth, usually conical to subconical; postlarval shell with pitted microornamentation in many fossil forms; pedicle opening variably developed, open posteriorly or closed by narrow band of periostracum or listrium; internal pedicle tube may be present; mantle canal system in both valves bifurcate in recent species, but poorly known in most fossil forms; lophophore in recent species spirolophe or schizolophe. Diagnosis from volume 2 of the Treatise on Invertebrate Paleontology

Famille DISCINIDAE Gray, 1840

[Discinidae Gray, 1840, p. 155] [=Orbiculidae M’Coy, 1844, p. 103] [incl. Orbiculoideinae Schuchert & Levene, 1929, p. 13; Disciniscinae Schuchert & Levene, 1929, p. 13; Acrosaccidae Willard, 1928, p. 258]

Dorsal valve with holoperipheral growth, usually conical to subconical; postlarval shell with pitted microornamentation in many fossil forms; pedicle opening variably developed, open posteriorly or closed by narrow band of periostracum or listrium; internal pedicle tube may be present; mantle canal system in both valves bifurcate in recent species, but poorly known in most fossil forms; lophophore in recent species spirolophe or schizolophe.

Diagnosis from volume 2 of the Treatise on Invertebrate Paleontology

NOTA :	Toutes diagnoses indiquées ici portent mention de la source utilisée dont il est obligatoire de citer la référence pour tout usage . La liste des espèces a été dressée par C. C. Emig.
	For all the diagnoses indicated herein, the original reference is given and must be cited for any use. The species list is provided by C. C. Emig.

Emig C. C., 1997 in: Treatise on Invertebrate Paleontology (R. L. Kaesler, ed.), Part H. Brachiopoda. Geological Society of America and University of Kansas, Boulder, Colorado, and Lawrence, Kansas, Vol. 1, 473-502.

Treatise on Invertebrate Paleontology (R. L. Kaesler, ed.), Part H. Brachiopoda. Geological Society of America and University of Kansas, Boulder, Colorado, and Lawrence, Kansas, vol. 2 (2000).

Genus Discina Lamarck, 1819

Genus Discinisca Dall, 1871

Genus Discradisca Stenzel, 1964

Genus Pelagodiscus Dall, 1908

Discinid species (under identification) from Brazil
© Cristiane Maria Rocha Farrapeira
Universidade Federal Rural de Pernambuco, Recife (Brasil)