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Inermonephtys N. SP. (polychaeta : nephtyidae) from SE Brazil, with comments on the known species of the genus.

AutorMartin, Daniel ; Martin, Daniel ; Gil, João ; Lana, Paulo da Cunha
Palabras claveAnnelida
New species
Se Brazil
Fecha de publicación1-abr-2009
ResumenThe genus Inermonephtys (Polychaeta , Nephtyidae) was first reported for the SW Atlantic by Lana (1986). He referred a number of specimens collected in the continental shelf off São Paulo and Paraná States (SE Brazil) to I. palpata Paxton, 1974, based upon the presence of “lateral bifid antennae” (“antenas laterais bifidas”, page 142) and barred pre-acicular chaetae with rows of denticles. This identification was erroneous and the access to the type-material of I. palpata Paxton, 1974 enabled the re-examination of both taxa. As a consequence, the original description of I. palpata is complemented with new data and iconography, and the Brazilian material is described as Inermonephtys n. sp. In addition to I. palpata, the new species is compared with the other five known species of the genus, based on a selection of morphological characters extracted from the original descriptions. Inermonephtys n. sp. is thus characterized by inter-ramal branchiae starting from chaetiger three and basal papillae starting on chaetiger six, as well as by having two kinds of lyrate chaetae. Lyrate chaetae occur in very short numbers as a post-acicular bundle both in noto- and neuropodia all along the body. The arms of a given lyrate chaetae are always similar in length, varying from very short to very long. The later are the most common, while the former are more difficult to distinguish and may be absent in some parapodia. REFERENCES Lana, P C (1986) Nerítica 1(1), 135–154. Paxton, H (1974) Rec. Aust. Mus. 29(7): 197–208.
DescripciónPoster presentado en la IX International Polychaete Conference, Maine (USA) en 2007.
Aparece en las colecciones: (CEAB) Comunicaciones congresos
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