| wallinia chavarriae n. sp. (trematoda: macroderoididae) in astyanax aeneus (gunther, 1860) and bryconamericus scleroparius (regan, 1908) (osteichthyes: characidae) from the area de conservación guanacaste, costa rica. | wallinia chavarriae n. sp. is described from the small-bodied characids astyanax aeneus and bryconamericus scleroparius in the area de conservación guanacaste, northwestern costa rica. the species differs from w. valenciae in possessing an acetabulum that is smaller than the oral sucker and vitelline follicles that are ovoid or rounded rather than elongate and tubular. detailed comparison between these 2 species is handicapped by the less than satisfactory condition of the type and only museum s ... | 2002 | 12053949 |
| the systematic position of wallinia spp. and margotrema spp. (digenea), parasites of middle-american and neotropical freshwater fishes, based on the 28s ribosomal rna gene. | the systematic relationships of aspinose allocreadiid-like digeneans from middle-american and neotropical freshwater fishes, such as wallinia pearse, 1920, margotrema lamothe-argumedo, 1970, magnivitellinum kloss, 1966 and other related genera, remain enigmatic. wallinia (2 spp.) and margotrema (2 spp.) have been placed in the subfamily walliniinae, within the macroderoididae. recent descriptions of species in these genera have followed this classification but have raised questions about their a ... | 2007 | 17587182 |
| phylogenetic affinities of auriculostoma (digenea: allocreadiidae), with descriptions of two new species from peru. | abstract abstract: two new allocreadiid trematodes are described from the intestine of characid fishes from rio itaya, a tributary of the amazon river near iquitos, peru. auriculostoma foliaceum n. sp. is described from bryconops cf. caudomaculatus (günther, 1864) backup, 2003, and auriculostoma diagonale n. sp. from stethaprion cf. erythrops cope, 1870. auriculostoma foliaceum n. sp. differs from its congeners by having a foliated lateral margin and lacking vitelline follicles in the forebody. ... | 2011 | 21506841 |