title: Amapacanthus amazonicus n. g., n. sp. (Acanthocephala: Diplosentidae: Allorhadinorhynchinae) from Arius passany and Anableps microleps (Pisces) at Maraca Island off northern Brazil.
abstract: Amapacanthus amazonicus n. g., n. sp. is described from the intestine of Arius passany (Valenciennes) and Anableps microleps Müller. The most important diagnostic features are: a small globular proboscis armed with 6 diagonal rows of 3 stout hooks; middle hooks conspicuously stouter and larger than anterior ones; terminal hooks as long as middle hooks but straighter and more slender; a double-walled proboscis receptacle; a trunk bearing spines anteriorly; and two tubular cement glands in the males. Amapacanthus n. g. is differentiated from Allorhadinorhynchus, Golvanorhynchus and Slendrorhynchus, the other genera of the Allorhadinorhynchinae, by the presence of a globular proboscis armed with a small number (18) of hooks. A key to the species of the Allorhadinorhynchinae is presented.
authors.affiliation: Instituto de Biología, UNAM, México DF, México.
authors.forename: G
authors.initials: G
authors.lastname: Salgado-Maldonado
authors.forename: C P
authors.initials: CP
authors.lastname: Santos
mesh_terms: D000049:Acanthocephala / Q000033:anatomy & histology / Q000145:classification*; D000818:Animals; D001938:Brazil; D005260:Female; D005399:Fishes / Q000469:parasitology*; D008297:Male