Caracteristiques morphologiques du pharynx de Nereis diversicolor Muller, 1776 [Polychetes Nereidae]

ABSTRACT

Within the biometrical study of the Nereidae and in order to caracterize the different populations, we looked for the most relevant biometrical characteristics. In fact, for these sea-animals, the weight and length remain just significant statements within certain limit; on the other hand the length of the maxillary, the number of paragnaths which decorate the proboscis can be precisely known