Orthacea

Orthacea

[ȯr′thās·ē·ə]
(paleontology)
An extinct group of articulate brachiopods in the suborder Orthidina in which the delthyrium is open.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Nekotorye predstaviteli nadsemejstva Orthacea iz verkhnego ordovika Estonii [Some Upper Ordovician representatives of the superfamily Orthacea of Estonia].
Brakhiopody nadsemejstv Orthacea, Dalmanellacea i Syntrophiacea iz nizhnego ordovika Pribaltiki [Lower-Ordovician Brachiopods of the superfamilies Orthacea, Dalmanellacea and Syntrophiacea of Eastern Baltic].
Nekotorye predstaviteli nadsemejstva Orthacea iz verkhnego ordovika Estonii [Some representatives of the Orthacea from the Upper Ordovician of Estonia].
Nekotorye predstaviteli nadsemejstva Orthacea iz verkhnego ordovika Estonii [Some representatives of the subfamily Orthacea in the Upper Ordovician of Estonia].