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Anatomia funcional de Protothaca (Leukoma) pectorina (Lamarck) (Bivalvia, Veneridae)

Functional anatomy of Protothaca (Leukoma) pectorina (Lamarck) (Bivalvia, Veneridae)

Resumo

Protothaca (Leukoma) pectorina (Lamarck, 1818) lives from the West Indies to Santa Catarina State, Brazil, in soft muddy beaches in quiet waters of protected bays with little amounts of suspended material. A study of the functional anatomy of P. pectorina and its ecological aspects were undertaken. The anatomy and functioning of the stomach and the mechanisms for selection of particles were observed. The siphons, ctenidia, labial palps and stomach were analised and related to the animal's natural environment. The siphons belong to type B (Yonge 1948), the ctenidia to type C (1a) (Atkins 1937). The ctenidia are homorhabdic (Ridewood 1903) and the stomach belongs to type V (Purchon 1960).

Bivalvia; Veneridae; Protothaca pectorina; functional anatomy; Brazilian littoral


Bivalvia; Veneridae; Protothaca pectorina; functional anatomy; Brazilian littoral

Anatomia funcional de Protothaca (Leukoma) pectorina (Lamarck) (Bivalvia, Veneridae)

Functional anatomy of Protothaca (Leukoma) pectorina (Lamarck) (Bivalvia, Veneridae)

Cordélia de Oliveira Castro GuerónI; Walter NarchiII

IDepartamento de Zoologia, Universidade Santa Úrsula. Rua Fernando Ferrari 75, Botafogo, 22231-040 Rio de Janeiro, Rio de Janeiro, Brasil

IIDepartamento de Zoologia, Instituto de Biociências, Universidade de São Paulo. Caixa Postal 11461, 05422-970 São Paulo, São Paulo, Brasil. Bolsista do CNPq

ABSTRACT

Protothaca (Leukoma) pectorina (Lamarck, 1818) lives from the West Indies to Santa Catarina State, Brazil, in soft muddy beaches in quiet waters of protected bays with little amounts of suspended material. A study of the functional anatomy of P. pectorina and its ecological aspects were undertaken. The anatomy and functioning of the stomach and the mechanisms for selection of particles were observed. The siphons, ctenidia, labial palps and stomach were analised and related to the animal's natural environment. The siphons belong to type B (Yonge 1948), the ctenidia to type C (1a) (Atkins 1937). The ctenidia are homorhabdic (Ridewood 1903) and the stomach belongs to type V (Purchon 1960).

Key words: Bivalvia, Veneridae, Protothaca pectorina, functional anatomy, Brazilian littoral

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AGRADECIMENTO. Ao Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq - pelo auxílio financeiro na forma de Bolsa de Produtividade Científica, que possibilitou a realização deste trabalho.

Recebido em 30.XI.1998; aceito em 13.XII.2000.

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Datas de Publicação

  • Publicação nesta coleção
    30 Abr 2009
  • Data do Fascículo
    Dez 2000

Histórico

  • Aceito
    13 Dez 2000
  • Recebido
    30 Nov 1998
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