Septibranchia

Septibranchia

[‚sep·tə′braŋ·kē·ə]
(invertebrate zoology)
A small order of bivalve mollusks in which the anterior and posterior abductor muscles are about equal in size, the foot is long and slender, and the gills have been transformed into a muscular septum.
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Bivalve moluscks of the genus Bathyneaera (Septibranchia, Cuspidariidae) of the world ocean.
de Endemicas especies Hyalospongiae Esponjas de cristal 6 2 (33%) Scleractinia Corales petreos 25 1 (4%) Gastropoda Caracoles 25 24 (96%) Turridae Cirripedia Crustaceos cirripedios 14 11 (79%) Tanaidacea Crustaceos 9 2 (22%) Macrura Crustaceos decapodos 29 10 (34%) Brachiura & Crustaceos decapodos 24 10 (41%) Anomura Bivalvia Bivalvos 7 7 (72%) Septibranchia Brachiopoda Braquiopodos 4 1 (25%) Echinoidea Erizos 19 8 (42%) Total 164 76 (46,3%) Tabla 3.
Cilia are particularly well known for generating the currents that provide for respiration and feeding in all bivalves, except the Septibranchia. These currents are substantial; clearance rates generated by cilia in the American oyster Crassostrea virginica are as high as 24 to 27 1/h (Loosanoff and Nomeijko, 1946; Collier, 1959 [both cited in Foster-Smith, 1975]).