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New species of Autolytus Grube, 1850, Paraprocerastea San Martín & Alós, 1989, and Sphaerosyllis Claparède, 1863 (Syllidae, Polychaeta) from the Iberian Peninsula

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Abstract:

During the project "Fauna Ibérica", established to develop a complete inventory of Iberian fauna, several new species belonging to the family Syllidae Grube, 1850 were found. In this paper, Autolytus labordai n. sp., Paraprocerastea draculai n. sp., and Sphaerosyllis parabulbosa n. sp. are described. Autolytus labordai n. sp. is characterized by having long nuchal lappets, short appendages, relatively long blades on the compound chaetae, and a trepan composed of eight or nine large teeth separated from one another by two medium-sized teeth or by two medium-sized teeth with one small tooth between them. Paraprocerastea draculai n. sp. is characterized by having tapering and somewhat flattened antennae, tentacular cirri and dorsal cirri of chaetiger 1, and short and ovoid dorsal cirri on the remaining parapodia. Its trepan is composed of two large, fang-shaped teeth, separated by two semicircles of 12-14 smaller teeth. Lastly, it only possesses simple chaetae, of which those of the anterior two chaetigers are different. Sphaerosyllis parabulbosa n. sp. is characterized by having minute antennae, tentacular and dorsal cirri, parapodial glands with rod-like material from chaetiger 4, unidentate blades on compound chaetae, and aciculae distally bent at a right angle.

Durante el desarrollo del proyecto "Fauna Ibérica", financiado por la CICYT, establecido para desarrollar un estudio completo de la Fauna de la Península Ibe´rica y a´reas pro´ximas, se encontraron varias especies nuevas pertenecientes a la familia Syllidae Grube, 1850 (Polychaeta). En el presente trabajo se realizan las descripciones de Autolytus labordai n. sp., Paraprocerastea draculai n. sp. y Sphaerosyllis parabulbosa n. sp. Autolytus labordai n. sp. se caracteriza por presentar proyecciones nucales largas, apéndices relativamente cortos, artejos de las sedas compuestas relativamente largos y un trépano compuesto de 8-9 dientes grandes separados entre sípor dos de tamaño mediano o dos medianos con uno pequeño entre ellos. Paraprocerastea draculai n. sp. estácaracterizado por presentar antenas, cirros tentaculares y cirros dorsales del primer setígero fusiformes, algo aplanados, mucho más largos que los cirros dorsales de los restantes segmentos, que son cortos y ovalados, asícomo un trépano con dos grandes dientes en forma de colmillos, separados entre sípor dos semicírculos de 12-14 dientes mucho menores. Por último, Sphaerosyllis parabulbosa n. sp. presenta unos apéndices diminutos, glándulas parapodiales con bastoncillos desde el cuarto setígero, sedas compuestas con artejos unidentados y acícula con la punta doblada en ángulo recto.

Keywords: AUTOLYTUS; IBERIAN PENINSULA; NEW SPECIES; PARAPROCERASTEA; POLYCHAETA; SPHAEROSYLLIS; SYLLIDAE; TAXONOMY

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/003648202320205210

Publication date: September 1, 2002

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