A new species of Paradoneis Hartman, 1965 (Annelida: Paraonidae) from the NE Iberian Peninsula (SE Bay of Biscay, NE Atlantic Ocean)

A new species of the genus Paradoneis Hartman, 1965 (Annelida, Paraonidae) has been identified from cir-calittoral soft bottoms of Basque Country (NE Iberian Peninsula, SE Bay of Biscay). The new species is mainly characterized by having small size, three prebranchial chaetigers, five (exceptionally, six) pairs of thin apinnate branchiae, modified notochaetae lyriform, and pygidial region whit seven cirri. In the present paper, the new species is described, illustrated and discussed. Some notes on its ecology and distribution in the area is also included. In addition, an identification key is provided for all known Paradoneis species. The Type Material has been deposited in the Museo Nacional de Ciencias Naturales, Madrid.