Guidus n. gen. (Cestoda: Tetraphyllidea), with description of a new species and emendation of the generic diagnosis of Marsupiobothrium

• Main Author: Ivanov, V.A.
• Format: Journal/Newspaper
• Language: unknown
• Subjects: definitive host; fish; flatworm; morphology; new species; animal anatomy; article; Bathyraja; cestode; Guidus; Marsupiobothrium; Marsupiobothrium alopias; Marsupiobothrium awii; nonhuman; species identification; Animals; Argentina; Cestoda; Cestode Infections; Fish Diseases; Intestines; Microscopy; Electron; Scanning; Skates (Fish); Alopias; Phyllobothriidae; Polaribacter; Rajidae; Rajiformes; Tetraphyllidea; Antarc*
• Online Access: https://hdl.handle.net/20.500.12110/paper_00223395_v92_n4_p832_Ivanov

Guidus n. gen. (Cestoda, Tetraphyllidea) is proposed for 3 cestode species from skates (Bathyraja spp.: Rajiformes, Rajidae). Members of Guidus differ from those of all other phyllobothriid genera in possessing 4 sessile and conspicuously muscular, saclike bothridia; a bothridial aperture toward anterior end of scolex, and perpendicular to scolex axis; aperture surrounded by a continuous sphincter of circular muscles, and 1 marginal accessory sucker. A new species, Guidus argentinense n. sp., is described, the diagnosis of Marsupiobothrium antarcticum is emended, and it is transferred to the new genus along with Marsupiobothrium awii. These species can be easily distinguished from G. argentinense by the presence of lappets in the bothridial margin. In addition, the diagnosis of Marsupiobothrium is emended based on the redescription of the type species, Marsupiobothrium alopias. © American Society of Parasitologists 2006.