The shallow-water chitons (Mollusca, Polyplacophora) of Caldera, Region of Atacama, northern Chile
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2015Metadata
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Araya, Juan Francisco
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The shallow-water chitons (Mollusca, Polyplacophora) of Caldera, Region of Atacama, northern Chile
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Abstract
The Molluscan species of the northern littoral of Chile have been sparsely studied. This
work reviews for the first time the diversity of polyplacophoran molluscs around the
port of Caldera, in the Region of Atacama (26°45’49”S; 70°45’17”W to 27°20’23”S;
70°56’46”W), northern Chile. Eleven species were found in this study: Acanthopleura
echinata (Barnes, 1824); Callistochiton pulchellus (Gray, 1828); Calloplax vivipara
(Plate, 1899), Chaetopleura peruviana (Lamarck, 1819); Chiton cumingsii Frembly,
1827; Chiton granosus Frembly, 1827; Chiton magnificus Deshayes, 1827; Enoplochiton
niger (Barnes, 1824), Radsia barnesii (Gray, 1828), Tonicia atrata (G. B. Sowerby II,
1840) and Tonicia chilensis (Frembly, 1827). All of the species occurring in the area have
distributions in the southeastern Pacific Ocean, from Ecuador to central Chile, and three
of them are species endemic to the Chilean coasts (Calloplax vivipara, Radsia barnesii,
and Tonicia atrata). This diversity of species is comparable to that of better surveyed
faunas of central and southern Chile or Patagonia. Of the eleven species recorded, the
geographic distribution records for Callistochiton pulchellus, Radsia barnesii and Tonicia
atrata are extended, and Calloplax vivipara is found alive again after 40 years, filling
a gap in its known distribution. Illustrations of living specimens in their habitat, distribution
records and a taxonomic key for all the studied taxa are also provided.
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URI: https://repositorio.uchile.cl/handle/2250/132488
DOI: DOI: 10.3897/zse.91.8536
ISSN: 1860-0743
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Zoosyst. Evol. 91 (1) 2015, 45–58
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