Nomimoscolex pertierrae n. sp. (Eucestoda: Proteocephalidea), a parasite of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) in Brazil and redescription of N. sudobim Woodland, 1935, a parasite of P. fasciatum

Abstract

The cestode Nomimoscolex sudobim Woodland, 1935 (Proteocephalidea) is redescribed on the basis of its type-specimens and recently collected material found in the intestine of the 'sudobim' Pseudoplatystoma fasciatum (Siluriformes: Pimelodidae) (type-host), from the Amazon River (near the type-locality). Nomimoscolex pertierrae n. sp. is described from the 'surubi' Pseudoplatystoma corruscans from the Paraná River around Porto Rico. Among fifteen known Nomimoscolex species, only N. sudobim possess a cortical uterus in combination with osmoregulatory canals some distance internal to the proglottis margins, as in N. pertierrae n. sp. N. pertierrae differs from N. sudobim, which exhibits the most similarity with the former species, in the morphology of the scolex, the size and unusual shape of microtriches (slender digitiform) on the internal and marginal regions of the suckers, and in the lower mean number of testes [(114 in N. pertierrae, ranging between 216 (recently collected material) and 240 (type-material) in N. sudobim)]. The material described as N. sudobim by Pavanelli & Rego (1992) from the intestine of P. corruscans is considered to be N. pertierrae. The utility of microtriches as characters for distinguishing between species is demonstrated in the clear differences in the shape of those of N. pertierrae and N. sudobim. The morphology of microtriches warrants more attention in future studies on the taxonomy of proteocephalidean cestodes.

Cairaella henrii gen. n., sp. n., a parasite of Norops trachyderma (Polychrotidae), and Ophiotaenia nicoleae sp. n. (Eucestoda: Proteocephalidea), a parasite of Thecadactylus rapicauda (Gekkonidae), in Ecuador

“…Judging from the original descriptions and drawings, only 3 out of 27 Ophiotaenia species parasitic in snakes of the New World, namely O. azevedoi, O. euzeti, and O. gilberti, harbour this character. Since this character is constant, it represents a good discriminative feature, as already pointed out for Nomimoscolex Woodland, 1934 by de Chambrier et al (2006).…”

Diversity of parasites of fish from the Upper Paraná River floodplain, Brazil

“…Quantitative information on the prevalence and intensity of infection by different parasites and on parasite community descriptors have been published previously for the following fish species: Prochilodus lineatus (Valenciennes, 1837) (Takemoto et al, 2002;Eiras et al, 2004;Lizama et al, 2004;2005;2006a, b); Acestrorhynchus lacustris (Lütken, 1875) (Carvalho et al, 2003) Kullander, 1983(Aoyama et al, 2005; P. squamosissimus (Tavernari et al, 2005); P. corruscans (Chambrier et al, 2006); Loricariichthys platymetopon Isbrücker andNijssen, 1979 (Ferrari et al, 2007); S. papaterra (Yamada et al, 2007) and Cichla spp. (Yamada et al, 2008).…”

A new species of Pseudocrepidobothrium (Cestoda: Proteocephalidea) from Pseudoplatystoma reticulatum (Pisces: Siluriformes) in the Paraná River basin (Argentina)

“…spinulifera Woodland, 1934; Nomimoscolex lopesi Rego, 1990;N. sudobim Woodland, 1935; Peltidocotyle rugosa Diesing, 1850; Regoella brevis Arredondo, de Chambrier et Gil de Pertierra, 2013; Spatulifer rugosa (Woodland, 1935) (see Gil de Pertierra 2005, de Chambrier et al 2006, Arredondo and Gil de Pertierra 2008; Pseudocrepidobothrium chanaorum is thus the eighth species reported from this fish host.…”