Les Oligochètes aquatiques de la Péninsule Ibérique : description de Stylodrilus curvithecus n. sp. (Lumbriculidae) et de Mesenchytraeus lusitanicus n. sp. et redescription de Cognettia hibernica Healy (Enchytraeidae).The aquatic Oligochaetes of the Iberain peninsula: description of Stylodrilus curvithecus n. sp. (Lumbriculidae) and Mesenchytraeus lusitanicus n. sp. with a redescription of Cognettia hibernica Healy (Enchytraeidae)

Free access article

Issue		Ann. Limnol. - Int. J. Lim. Volume 29, Number 2, June 1993


Page(s)		129 - 138
DOI		10.1051/limn/1993012

Annls Limnol. 29 (2) 1993 : 129-138
DOI: 10.1051/limn/1993012

Les Oligochètes aquatiques de la Péninsule Ibérique : description de Stylodrilus curvithecus n. sp. (Lumbriculidae) et de Mesenchytraeus lusitanicus n. sp. et redescription de Cognettia hibernica Healy (Enchytraeidae).

R. Collado¹, E. Martínez-Ansemil¹ and N. Giani²

¹ Departamento de Bioloxia Animal, Universidade da Coruña, Campus de Elviña, 15071 A Coruña, Espagne
² Laboratoire d'Hydrobiologie, URA 695 CNRS, Université Paul Sabatier, 118, route de Narbonne, 31062 Toulouse cedex, France

Résumé
Stylodrilus curvithecus n. sp., collectée dans un ruisseau de Galice (Espagne), est une espèce proche de S. glandulosus ; elle s'en distingue essentiellement par la forme des spermathèques et l'absence de ramifications latérales du vaisseau dorsal dans la région postérieure. Mesenchytraeus lusitanicus n. sp. récoltée dans plusieurs rivières de Galice (Espagne) et du Nord du Portugal est décrite. Une redescription complète de Cognettia hibernica Healy, 1975 à partir de 2 exemplaires récoltés au Portugal permet de compléter la description originale de cette espèce.

Abstract
Stylodrilus curvithecus n. sp., collected from a stream of Galicia (Spain), is closely related to S. glandulosus ; it is, however, distinguished by the curved shape of the spermathecae and the absence of blind posterior lateral blood vessels. Mesenchytraeus lusitanicus n. sp., from several rivers of Galicia (Spain) and the North of Portugal is described. The redescription of Cognettia hibernica Healy, 1975, on the basis of two newly collected specimens from Portugal, complements the original diagnosis of the species.

Key words: oligochaeta -- enchytraeidae -- lumbriculidae -- new species -- freshwater -- Iberian peninsula

Mots clés : oligochaeta -- enchytraeidae -- lumbriculidae -- espèces nouvelles -- eaux douces -- péninsule Ibérique

© Gauthier-Villars 1993

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