Protobranchia

Protobranchia

[‚prōd·ō′braŋ·kē·ə]
(invertebrate zoology)
A small and primitive order in the class Bivalvia; the hinge is taxodont in all but one family, there is a central ligament pit, and the anterior and posterior adductor muscles are nearly equal in size.
References in periodicals archive ?
En esta oportunidad se da a conocer el hallazgo de 3 especies de Bivalvos de la subclase Protobranchia, y 7 especies de la Subclase Heterodonta, que son registradas por primera vez para el mar peruano.
Nuevos registros de Protobranchia (Mollusca: Bivalvia) para el mar peruano.
Crystalline styles are found in all bivalve taxonomic groups except the subclass Protobranchia, and they also occur in some orders of herbivorous gastropods.
Palabras claves: Mollusca, Protobranchia, Pteriomorphia, nuevos registros, Peru.
Keywords: Mollusks, Protobranchia, Pteriomorphia, new records, Peru.
Respecto a los Bivalvia Protobranchia, que viven en la zona infralitoral, se reporta por primera vez para el mar peruano, dos especies que se suman a las registradas anteriormente por los autores (Paredes y Cardoso, 2001).
Si anadimos las dos especies de aguas ecuatoriales, registrados en el presente trabajo, se incrementa a 26 el numero de bivalvos Protobranchia conocidos para la costa peruana.
In all subclasses except Protobranchia, these early stages start with a short row of unidirectional slender filaments of only the inner demibranch (Jackson, 1890; Drew, 1901; Wasserloos, 1911; Ansell, 1962; Waller, 1981; Gros et al.
Based on morphological and molecular data sets, the Protobranchia are therefore considered to be a sister group to the other bivalves, which are grouped as Autobranchia (Hoeh et al.
Some observations on the habits, anatomy and embryology of members of the Protobranchia.