Three new species and genera of Dilepididae (Cestoda, Cyclophyllidea) from neotropical Picidae (Aves)

Abstract

The three new genera testify a high diversification of cestodes from Piciformes (Picidae) in South America, reveal some new important characters and show how detailed a generic diagnosis has to be in order to emphasize differences and similarities in related genera. Apokrimi n. gen., a monotypical genus, differs from all other Dilepididae in its enormous ''sucker-like'' pseudoscolex cutting off the scolex. Krimi Burt, 1944 is the nearest genus to it as to anatomy and hosts; moreover, the swelling of the neck in some of its species seems to prelude the appearance of the pseudoscolex of Apokrimi, an extreme apomorphy. Apoliga n. gen. differs from all other Dilepididae in its atrio-genital complex: atrial cavity proper with long bristle-like spines, ductus masculinus well-defined, unarmed, cirrus with extremely long, strong, bristle-like spines. Diagnosis confirmed by 5 cogeneric species, observed in addition to the type species and not yet described. Highly specific of Picidae. Monoliga n. gen., a monotypical genus, is similar to Liga; it differs in the single hooks crown, ovary in the poral half of the medulla, cirrus pouch backward inclined in adult proglottides and other more subtle character states. PU - MUSEUM HISTOIRE NATURELLE PI - GENEVA 6 PA - CASE POSTALE 6434, ATTN:DENISE MAIER ADMN REV SUISSE DE ZOOLOGIE, CH-L211 GENEVA 6, SWITZERLAND