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The Trochidae family Mollusca Gastropoda in northern Chile Taxonomic and ecological considerations La Familia Trochidae Mollusca Gastropoda en el norte de Chile Consideraciones ecologicas y taxonomicas



The Trochidae family Mollusca Gastropoda in northern Chile Taxonomic and ecological considerations La Familia Trochidae Mollusca Gastropoda en el norte de Chile Consideraciones ecologicas y taxonomicas



Revista Chilena de Historia Natural. Diciembre; 734: 757-769



This study reveals the diversity, and the bathimetric and latitudinal distribution of the snails of the Trochidae family members in northern Chile, throughout the analysis of all Trochidae gastropods entailed in intertidal and subtidal (from the 'camaron naylon' fishery) samples collected during 1996 and 1999 between Arica (ca 18deg. S) and Los Vilos (ca 31deg. S). The Trochidae family in northern Chile have four genus: Tegula and Diloma that are distributed on intertidal and shallow subtidal habitats, and Calliostoma and Bathybembix which occurr at dephts greather than 200 m. Tegula have 6 species: T. quadricostata, T. luctuosa, T. ignota, T. atra, T. tridentata, and T. euryomphala are distributed on intertidal and shallow subtidal habitats. Diloma is a monospecific genus, whereas D. nigerrima is an intertidal species. The genus Calliostoma have two species C. chilena and C. delli occurring between 200 and 750 m depth and the Bathybembix with two species, B. Humboldti and B. macdonaldi, distributed between 200 and 1480 m depth. The bathimetric distribution of Trochidae shows a strong correlation with food strategy: Diloma and Tegula are herbivores, while Bathybembix species are deposit feeders and Calliostoma are carnivores.

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