title: Labrorostratus caribensis, a new oenonid polychaete from the Grand Caribbean living in the body cavity of a nereidid, with emendation of the genus.
abstract: Endoparasitic relationships among polychaetes are uncommon and mostly restricted to about 20 species of the family Oenonidae. We herein describe Labrorostratus caribensis, a new oenonid species living in the body cavity of a nereidid polychaete in Chinchorro Bank (Mexican Caribbean). This is the first report of a parasitic relationship between oenonids and nereidids in the Grand Caribbean region. The new species is diagnosed by the jaw apparatus reduced to only maxillary carriers fused, one simple modified ventral chaeta from midbody and lack of acicular spines. The generic diagnosis is emended to include species without maxillary plates. A synopsis of parasitism among polychaetes worldwide is presented.
authors.affiliation: Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México. Circuito exterior s/n, Cd. Universitaria, México D.F., 04510, México.; Email: unknown.
authors.forename: Pablo
authors.initials: P
authors.lastname: Hernández-Alcántara
authors.affiliation: Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México. Circuito exterior s/n, Cd. Universitaria, México D.F., 04510, México.; Email: cupisma@yahoo.com.mx.
authors.forename: Ismael Narciso
authors.initials: IN
authors.lastname: Cruz-Pérez
authors.affiliation: Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México. Prol Av. Niños Heroes s/n, Puerto Morelos Quintana Roo, 77580, México.; Email: solisw@cmarl.unam.mx.
authors.forename: Vivianne
authors.initials: V
authors.lastname: Solís-Weiss
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D017753:Ecosystem; D009929:Organ Size; D011077:Polychaeta / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development