title: A new species of Acaenodera (Digenea: Acanthocolpidae) parasitizing Conger orbignyanus (Pisces: Congridae) from the coasts of Argentina.
abstract: A new species, Acaenodera spinosior, is described based on specimens collected from the intestine of Conger orbignyanus Valenciennes (Pisces: Congridae) caught in waters off Mar del Plata (38 degrees 08'S, 57 degrees 32'W), Argentina. Five of 36 congers examined were parasitized (prevalence: 13.9%, mean intensity: 2.6+/-1.52, range: 1-5). The new species is distinguished from its only congener, Acaenodera placophora Manter and Pritchard, 1960, a parasite of congers off Hawaii, by its larger size, lacking eyespots, and exhibiting a greater number of circumoral, mid-ventral and lateral spines. This is the first record of Acaenodera Manter and Pritchard, 1960 in Atlantic waters.
authors.affiliation: Laboratorio de Parasitología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata-Consejo Nacional de Investigaciones Científicas y Técnicas, Mar del Plata, Argentina. jetchego@mdp.edu.ar
authors.forename: Jorge A
authors.initials: JA
authors.lastname: Etchegoin
authors.forename: Ana L
authors.initials: AL
authors.lastname: Lanfranchi
authors.forename: Florencia
authors.initials: F
authors.lastname: Cremonte
authors.forename: Juan T
authors.initials: JT
authors.lastname: Timi
mesh_terms: D000818:Animals; D001118:Argentina; D004524:Eels / Q000469:parasitology*; D005393:Fish Diseases / Q000469:parasitology*; D005835:Genitalia / Q000033:anatomy & histology; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D013045:Species Specificity; D014200:Trematoda / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*