The polymorphic top-shell puzzle: iterative taxonomy of Calliostoma Swainson, 1840 (Gastropoda: Calliostomatidae), in the Mediterranean Sea
Giacomo Chiappa,
Giulia Fassio,
Carlo Smriglio
et al.
Abstract:Calliostoma Swainson, 1840, as currently conceived, is the most species-rich genus of the order Trochida, with over 350 recognized species worldwide. The shell variability in these vetigastropods is extremely high, resulting in conflicting taxonomic attributions at both the genus and species levels. In the Mediterranean Sea, the remarkable morphological diversity of the Calliostoma top shells has led to the description of dozens of different taxa, of which nine are currently accepted. This taxonomic framework … Show more
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