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A CONTRIBUTION TO THE KNOWLEDGE ON THE MORPHOMETRY AND THE ANATOMICAL CHARACTERS OF PENNELLA BALAENOPTERAE (COPEPODA, SIPHONOSTOMATOIDA, PENNELLIDAE), WITH SPECIAL REFERENCE TO THE BUCCAL COMPLEX

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image of Crustaceana

Pennella balaenopterae, the largest known copepod, still presents many questions regarding its morphological features and its mode of life. Twelve specimens of P.balaenopterae were collected from Balaenoptera physalus in the northeastern Atlantic Ocean. Their morphological characteristics have been analysed by scanning electron microscopy and a detailed morphometric study has been accomplished. The buccal complex is described for the first time, providing details on the mouth, first maxillae, second maxillae, and buccal stylets, together with a new, trilobed structure not previously described for the genus. Other appendages are also presented, including the first antenna, second antenna, swimming legs, and other external and internal structures. The results are discussed and compared with those found in the literature, together offering a more complete picture of the anatomy of this species.

Pennella balaenopterae, le plus grand copépode connu, pose encore des questions quant à ses caractères morphologiques et son mode de vie. Douze spécimens de P. balaenopterae ont été récoltés sur Balaenoptera physalus dans l'océan Atlantique nord-oriental. Leurs caractéristiques morphologiques ont été analysées en microscopie électronique à balayage et une étude morphométrique détaillée a été réalisée. Le complexe buccal est décrit pour la première fois, fournissant des détails sur la bouche, les maxillules, les maxilles et les stylets buccaux, avec une nouvelle structure trilobée, qui n'avait pas été décrite auparavant pour le genre. D'autres appendices sont aussi présentés, incluant les antennules, les antennes, les pattes natatoires ainsi que d'autres structures externes et internes. Les résultats sont discutés et comparés avec ceux trouvés dans la littérature, l'ensemble offrant une image plus complète de l'anatomie de cette espèce.

Affiliations: 1: Instituto Español de Oceanografía (IEO), Apdo. 240, E-39080 Santander, Spain; 2: Universidad Complutense de Madrid (U.C.M.), Facultad de Biología, Departamento de Biología Animal I, E-28040 Madrid, Spain; 3: Asociación Científica de Estudios Marinos (A.C.E.M.), Apdo. 1061, E-39080 Santander, Spain

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/content/journals/10.1163/156854001750096292
2001-02-01
2016-09-27

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