New data on Warrana besnardi, a tiny bivalve mollusk from the southeastern Brazilian coast

Autor(es)

Batistao, Alan Rodrigo ^[1] ; Passos, Flavio Dias ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Biol, Dept Biol Anim, UNICAMP, Caixa Postal 6109, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN MALACOLOGICAL BULLETIN; v. 38, n. 1, p. 55-59, JUL 2020.
• Citações Web of Science: 0

Resumo

Warrana besnardi (Klappenbach, 1963) is the single Atlantic species of the genus, and part of the family Condylocardiidae, composed of 21 genera and about 150 species. Recent availability of many well-preserved specimens allowed us to perform a detailed study of the shell of this species, using scanning electron microscopy and descriptions of the hinge structure, the larval shell, and the inner surface, complimenting and expanding previous taxonomic work. This morphological assessment included very small (0.5 mm in length), young individuals and larger (up to 1.5 mm in length), fully developed animals. Key new observations include the outline of the valves that varies with growth, with the young individuals being more equilateral, while the adults are obliquely inequilateral. The inner surface of the valves has microscopic pores, a feature already observed for other condylocardiids (but not for the Cuninae). The larval shell has the prodissoconch I (pI) averaging 220 mu m in length, and the prodissoconch II (pII) 259 mu m, measurements which suggest lecithotrophic development and that W. besnardi probably broods its young. (AU)

• Processo FAPESP: 18/06347-6 - Biodiversidade e biogeografia de animais bentônicos de mar profundo: um estudo dos Caudofoveata (Mollusca, Aplacophora) do Brasil
• Beneficiário: Flávio Dias Passos
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/10313-0 - Consolidação de coleções científicas de invertebrados marinhos: estratégias para conservação da biodiversidade
• Beneficiário: Antonia Cecília Zacagnini Amaral
• Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 18/11431-6 - Desvendando a família Condylocardiidae (Mollusca, Bivalvia): um estudo anatômico e taxonômico de Warrana besnardi (Klappenbach, 1963)
• Beneficiário: Alan Rodrigo Batistão
• Linha de fomento: Bolsas no Brasil - Iniciação Científica