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A new species of Mysidium (Peracarida: Mysida: Mysidae) from the eastern tropical Pacific

Published online by Cambridge University Press:  16 February 2016

Manuel Ortiz
Affiliation:
Laboratorio de Crustáceos, Facultad de Estudios Superiores Iztacala-Universidad Nacional Autónoma de México, Av. de los Barrios 1, Los Reyes Iztacala, 54090 Tlalnepantla, Estado de México, México
Michel E. Hendrickx*
Affiliation:
Laboratorio de Invertebrados Bentónicos, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, Mazatlán, Sinaloa 82000, México
Ignacio Winfield
Affiliation:
Laboratorio de Crustáceos, Facultad de Estudios Superiores Iztacala-Universidad Nacional Autónoma de México, Av. de los Barrios 1, Los Reyes Iztacala, 54090 Tlalnepantla, Estado de México, México
*
Correspondence should be addressed to:M.E. Hendrickx, Laboratorio de Invertebrados Bentónicos, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, Mazatlán, Sinaloa 82000, México email: michel@ola.icmyl.unam.mx

Abstract

A new species of Mysidium from the eastern tropical Pacific, Mexico, is described, representing the second species of this genus described for the Pacific Ocean and the eighth species reported worldwide. Mysidium pumae sp. nov. is distinguished from the other species of the genus by several characters including: the lanceolate appendix masculina, 3× as long as wide, tapering distally, with a distal tuft of 16 setae and an inner proximal tuft of more than 30 setae, the male pleopod 4 with endopod bearing 3 setae, the exopod with 4 articles, the modified seta from article 3 of the exopod bifid, telson 2.3× as long as wide, distally concave. A table with the main differences among all the known species in the genus is provided.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2016 

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References

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