Pempheris
gasparinii,a new species of sweeper fish from Trindade Island,southwestern Atlantic (Teleostei,Pempheridae) |
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Authors: | Hudson T Pinheiro Giacomo Bernardi Luiz A Rocha |
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Institution: | 1.Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA 95060 USA;2.Ichthyology Section, California Academy of Sciences, San Francisco, CA 94118 USA |
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Abstract: | Pempheris
gasparinii
sp. n. is described from five specimens, 59.1–68.0 mm in standard length. It is only known to occur in the shallow reefs of Trindade Island, 1200 km east of the Brazilian coast, in the southwestern Atlantic. Pempheris
gasparinii is the third recognized species of Pempheris in the Atlantic Ocean. This new species is morphologically similar to its close relative, Pempheris
poeyi, differing by the number of lateral-line scales (51–54 in Pempheris
gasparinii vs. 47–49 in Pempheris
poeyi), scales below lateral line (10–11 vs. 9), circumpeduncular scales (11–12 vs. 13), head and caudal peduncle lengths (2.7–3.3 vs 3.5–4.0 in head length). Moreover, Pempheris
gasparinii shows a 4% genetic divergence from Pempheris
poeyi at the cytochrome oxidase I locus (COI), consistent with a lineage split at the beginning of the Pleistocene. This new species represents the 12th endemic fish species from Trindade Island. |
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Keywords: | Endemism COI Vitó ria-Trindade Chain oceanic island Brazil reef fish |
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