title: A new species of Paraberrapex Jensen, 2001 (Cestoda: Lecanicephalidea) from Squatina guggenheim Marini (Squatiniformes: Squatinidae) off Argentina.
abstract: Paraberrapex atlanticus sp. n. (Cestoda: Lecanicephalidea) is described from the spiral intestine of the angel shark Squatina guggenheim Marini from coastal waters off Buenos Aires Province, Argentina. Paraberrapex atlanticus sp. n. can be distinguished from the only species described in the genus, P. manifestus Jensen, 2001 in having cocoons 5-6 times longer with more eggs per cocoon, the extension of the uterine duct, the distribution of vitelline follicles, and the size and density of microtriches on the bothridial surfaces. The presence of P. atlanticus sp. n. in S. guggenheim confirms the specificity of Paraberrapex Jensen, 2001 for squatiniform sharks.
authors.affiliation: Instituto de Biodiversidad y Biologia Experimental y Aplicada (IBBEA, CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina.|Consejo Nacional de Investigaciones Cientificas y Tecnicas, Ciudad Autonoma de Buenos Aires, Argentina.
authors.forename: Leonardo D
authors.initials: LD
authors.lastname: Mutti
authors.affiliation: Instituto de Biodiversidad y Biologia Experimental y Aplicada (IBBEA, CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina.|Consejo Nacional de Investigaciones Cientificas y Tecnicas, Ciudad Autonoma de Buenos Aires, Argentina.|Departamento de Biodiversidad y Biologia Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autonoma de Buenos Aires, Argentina.
authors.forename: Veronica A
authors.initials: VA
authors.lastname: Ivanov
mesh_terms: D000818:Animals; D001118:Argentina; D002589:Cestoda / Q000033:anatomy & histology / Q000145:classification*; D058507:Host Specificity; D007422:Intestines / Q000469:parasitology; D012754:Sharks / Q000469:parasitology*; D013045:Species Specificity
keywords: Paraberrapex atlanticus sp. n.; angel sharks; southwestern Atlantic Ocean; tapeworms