Malmgrenia louiseae sp. nov., a new scale worm species (Polychaeta: Polynoidae) from southern Europe with a key to European Malmgrenia species

Jérôme Jourde (1) , Leandro Sampaio (2) , Ruth Barnich (3) , Paulo Bonifácio (4) , Céline Labrune (5) , Victor Quintino (2) , Pierre-Guy Sauriau (1)

1 LIENSs - LIttoral ENvironnement et Sociétés
2 Department of Biology and CESAM
3 Thomson Unicomarine - Thomson Unicomarine Ltd.
4 EPOC - Environnements et Paléoenvironnements OCéaniques
5 LECOB - Laboratoire d'Ecogéochimie des environnements benthiques

Malmgrenia louiseae sp. nov. is described from both the Western Mediterranean in the Gulf of Lions, and the Northeast Atlantic from off Portugal and the Bay of Biscay. The species was found in muddy sediments in shallow water and is possibly associated with echiurids or synaptid holothurians. Malmgrenia louiseae sp. nov. can be clearly distinguished from all other known Malmgrenia species by the presence of an infra-acicular process in addition to the supra-acicular process on the acicular lobe of the neuropodia, the lack of microtubercules on the elytra, two kinds of notochaetae (stout with blunt tip and slender with fine pointed tip), and exclusively unidentate neurochaetae. An identification key to the Northeast Atlantic and Mediterranean Malmgrenia species is provided.

Mots clés: Polychaeta; Polynoidae; Taxonomy; Malmgrenia; Mediterranean; North-east Atlantic; Associations

Domaines: Biodiversité; Systématique, phylogénie et taxonomie

Jérôme Jourde, Leandro Sampaio, Ruth Barnich, Paulo Bonifácio, Céline Labrune, et al.. Malmgrenia louiseae sp. nov., a new scale worm species (Polychaeta: Polynoidae) from southern Europe with a key to European Malmgrenia species. Journal of the Marine Biological Association of the UK, 2015, 95 (5), pp.947-952. ⟨10.1017/S0025315414001878⟩. ⟨hal-01245380⟩