title: First species of Leptochelia Dana, 1849 (Crustacea: Tanaidacea) from the Eastern Pacific, with an annotated checklist and identification keys for the genus.
abstract: Forty three species of leptocheliids are known worldwide. In the American region only eight species have been described from the Western Atlantic, while for the Eastern Pacific none have been described, suggesting that the diversity of this family has been severely underestimated in this region. Here we describe the first species of Leptochelia from the Eastern Pacific, Leptochelia mexicana n. sp., which is characterized by the males having a spiniform seta on the second segment of uropodal endopod, a novel feature for the genus. In addition, the first annotated checklist and a taxonomic key with illustrations for Leptochelia species are included. The list includes the type locality, type depository, distribution, habitat and, in some cases, remarks.
authors.affiliation: Estructura y Función del Bentos. El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal. Ave. Centenario Km 5.5, Chetumal, Quintana Roo, México, 77014.; Email: jani.jarquin@gmail.com.
authors.forename: Jani
authors.initials: J
authors.lastname: Jarquín-González
authors.affiliation: Universidad del Mar, campus Puerto Ángel, Laboratorio de Sistemática de Invertebrados Marinos (LABSIM), Ciudad Universitaria, Puerto Ángel, Oaxaca, México, 70902.; Email: ms_garcia_m@hotmail.com.
authors.forename: María Del Socorro
authors.initials: Mdel S
authors.lastname: García-Madrigal
authors.affiliation: Estructura y Función del Bentos. El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal. Ave. Centenario Km 5.5, Chetumal, Quintana Roo, México, 77014.; Email: lcarrera@ecosur.mx.
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Carrera-Parra
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D057189:Checklist; D003445:Crustacea / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D017753:Ecosystem; D005260:Female; D008297:Male; D009929:Organ Size; D010140:Pacific Ocean