A New Acanthocephalan Species (Archiacanthocephala: Oligacanthorhynchidae) from the Crab-Eating Fox (Cerdocyon thous) in the Brazilian Pantanal Wetlands

Abstract

A new species of Oligacanthorhynchidae (Acanthocephala) Prosthenorchis cerdocyonis n. sp. is described from 17 specimens collected from the small intestine of the crab-eating fox Cerdocyon thous Linnaeus, 1766 (Canidae: Carnivora) found in the Brazilian Pantanal wetlands. Specimens were studied using light and scanning electron microscopy. Characteristic features distinguishing the new species from others already described are presented, such as size of the body, the position of lemnisci, size of the eggs, host, and geographical distribution. Details of the body surface obtained by scanning electron microscopy, such as the presence of 2 lateral papillae in the proximal region of the proboscis, the presence of barbs in hooks, and a robust and festooned collar, helped to identify the species. Until now, specimens belonging to Prosthenorchis reported from Cerdocyon thous were not identified to species. Furthermore, the new species is the first to be recorded in C. thous found in the Pantanal wetlands.

New records of three species of nematodes in Cerdocyon thous from the Brazilian Pantanal wetlands

“…In this manuscript, we reported for the first time three nematode species in the Pantanal biome, thereby expanding upon the geographical distribution of these helminth species. Likewise, in another animal found dead in the Nhumirim Ranch, Pantanal, we have recently found a new species of Acanthocephala (GOMES et al, 2015). These findings highlight how poor our knowledge currently is regarding the species that parasitize wild mammals in Brazil.…”

The molecular profile of Paratrajectura longcementglandatus Amin, Heckmann et Ali, 2018 (Acanthocephala: Transvenidae) from percid fishes in the marine waters of Iran and Iraq

“…More sequence data from other geographical isolates using more gene targets will be useful for exploring the phylogenetic relationships among species. On the other hand, using of molecular tools for identification of acanthocephalan species is still scarce due to the lack of sequences of different genera of acanthocephalans in GenBank (Amin et al, 2013;Salgado-Maldonado, 2013;Weaver & Smales, 2013;Amin et al, 2014;Smales, 2014;Gomes et al, 2015;Steinauer & Nickol, 2015). More molecular studies are recommended in order to elucidate acanthocephalans classification.…”

A New Species of the Acanthocephalan Genus Filisoma (Cavisomidae) from Perciform Fishes in Rio de Janeiro, Brasil

“…The molecular data analyzed also suggest that families of Palaeacanthocephala must be reevaluated, since the delineation of monophyletic families was not clear in any of the topologies obtained, especially for species of Echinorhynchidae. The lack of sequences of different genera of Acanthocephala demonstrates that the use of molecular tools in defining species of Acanthocephala is still scarce and a large number of studies still describe and redescribe species based only on morphology [2,4,[28][29][30][31][32]. For Cavisomidae, for example, there are genetic sequences of only three species available in the GenBank, all of them from the genus Filisoma (F. bucerium, F. rizalinum and now F. caudata n.…”