Morphometric and taxonomic approach to describe <i>Heterospio variabilis</i> (Annelida, Longosomatidae), a new species with three size-dependent morphotypes, from the Gulf of California, Eastern Pacific.

The Wilks’ lambda value of 0.093 was highly significant ( F (12,96) = 18.2, p = 0.0001), supporting the hypothesis that the examined individuals could be assembled in three morphological groups; the analysis also showed that the individuals were appropriately classified inside the corresponding group.

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