The Genus Haminoea (Gastropoda: Cephalaspidea) in Portugal, with aReview of the European Species

摘要

The study of specimens of Haminoea collected on the coast of Portugal, together with the re-evaluation of historical specimens used by Nobre (1938-40) in his main work on the Portuguese molluscs, recognized the presence of two species, Haminoea navicula (da Costa, 1778) and H. Orbignyana (Ferussac, 1822), and confirmed the misidentification of H. Orbignyana as H. elegans (Gray, 1825). Anatomical analysis found intraspecific variability in the radula of H. navicula and H. Orbignyana and in the seminal duct of the latter. The systematic value of taxonomic features including the shell, external morphology, animal coloration, radula, jaws, gizzard plates, prostate gland, seminal duct, penis and egg-masses is discussed. For all European species but H. Orbignyana, identification is only possible when anatomical data are considered, and the most relevant character is the male reproductive system. SEM images of the penis and prostate of H. navicula and H. Orbignyana are given for the first time. A synoptic table for the recognition of the European species is provided.