A new species of Leptodiaptomus (Copepoda, Diaptomidae) from Northwestern Mexico with comments on the distribution of the genus |
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Authors: | Elias-Gutierrez M; Suarez-Morales E; Romano-Marquez B |
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Institution: | El Colegio de la Frontera Sur (ECOSUR) - Chetumal, AP 424, Chetumal, Quintana Roo 77000, Mexico |
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Abstract: | A new species of the freshwater planktonic copepod genus
Leptodiaptomus is described for a small pond in
Northwestern Mexico. Leptodiaptomus dodsoni n. sp. can
be easily distinguished mainly by the presence of an unusually large
sinusoid spine on male antennular segment 13, and by the features of the
fifth legs of both sexes. This genus is known to be distributed mainly in
North America with 19 recognized species. Of these, six ocur in Mexico, and
the new species seems to be closely related to most of them. It is probable
that this group of species (including the new one) represents the
southwards radiation of the genus from North America. Compared to the
Caribbean and South American, the North American influence seems to be the
most relevant for diaptomid copepods in Mexico. At least two Mexican
species of Leptodiaptomus, including
L.dodsoni, are restricted in distributional range to
high-altitude temporal ponds, and both could be considered endemics.
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