title: Euryphorus suarezi n. sp. (Copepoda: Caligidae) parasitic on an elasmobranch from the Gulf of Mexico.
abstract: Currently, the caligid genus Euryphorus Milne Edwards, 1840 contains two valid species. A new species, Euryphorus suarezi, is described based on adult females and males collected from the spotted eagle ray Aetobatus narinari (Euphrasen) (Elasmobranchii: Myliobatidae), captured off Campeche and Tabasco, Mexico (southern coast of the Gulf of Mexico). The new species is mainly distinguished from its congeners by the absence of dorsal plates, the presence of postantennal process, bifurcated maxillule, maxilliped with slender corpus, and leg 4 with 3-segmented endopod. Leg 6 is conspicuous in the male. Additional differences are described. This is the first record of a species of Euryphorus from an elasmobranch host, which may provide insight into the evolutionary relationships within the Caligidae.
authors.affiliation: Catedrático CONACYT, Centro de Investigación en Alimentación y Desarrollo, A.C., Unidad Mazatlán en Acuicultura y Manejo Ambiental, Av. Sábalo Cerritos s/n, 82100, Mazatlán, Sinaloa, Mexico. francisco.morales@ciad.mx.
authors.forename: Francisco Neptalí
authors.initials: FN
authors.lastname: Morales-Serna
authors.affiliation: Catedrática CONACYT, Universidad Autónoma del Carmen, Facultad de Ciencias Naturales, Centro de Investigación de Ciencias Ambientales, Av. Laguna de Términos s/n Col. Renovación 2da Sección, C.P. 24155, Ciudad del Carmen, Campeche, Mexico.
authors.forename: María Amparo
authors.initials: MA
authors.lastname: Rodríguez-Santiago
authors.affiliation: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica, Mazatlán, Sinaloa, Mexico.
authors.forename: Samuel
authors.initials: S
authors.lastname: Gómez
mesh_terms: D000818:Animals; D033342:Copepoda / Q000033:anatomy & histology* / Q000145:classification*; D005260:Female; D060851:Gulf of America; D008297:Male; D008800:Mexico; D012860:Skates, Fish / Q000469:parasitology*; D013045:Species Specificity