A new species of Mastigodiaptomus Light, 1939 from Mexico, with notes of species diversity of the genus (Copepoda, Calanoida, Diaptomidae)

A new species of the genus Light, 1939, named was found in a freshwater system in the City of Mazatlán, in the northern region of Mexico. Morphologically, the females of this new species are distinguishable from those of its congeners by the following combination of features: the right distal corner...

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Bibliographic Details
Published in:ZooKeys 2016-01, Vol.637 (637), p.61-79
Main Authors: Gutiérrez-Aguirre, Martha Angélica, Cervantes-Martínez, Adrián
Format: Article
Language:English
Subjects:
Analysis
Biodiversity
COI protein
Congeners
Discovery and exploration
Genetic distance
Integument
Mastigodiaptomus
New species
Species diversity
Zoology
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Summary:A new species of the genus Light, 1939, named was found in a freshwater system in the City of Mazatlán, in the northern region of Mexico. Morphologically, the females of this new species are distinguishable from those of its congeners by the following combination of features: the right distal corner of the genital double-somite and second urosomite have a wedge-shaped projection, the fourth urosomite has no dorsal projection and its integument is smooth. The males are distinct by the following features: the right caudal ramus has a wedge-shaped structure at the disto-ventral inner corner; the basis of the right fifth leg has one triangular and one rounded projection at the distal and proximal margins, respectively, plus one hyaline membrane on the caudal surface close to the inner margin; the aculeus length is almost the width of the right second exopod (Exp2); and the frontal and caudal surfaces of the right Exp2 are smooth. Furthermore, the analysis of the COI gene of sp. n. has revealed that (Herrick, 1895) is its nearest congener, with 18.64% of genetic distance. A key for the identification of the known species of the genus is provided.
ISSN:1313-2989
1313-2970
DOI:10.3897/zookeys.637.10276