Estudo do gênero Rhopalias stiles &amp; Hassall, 1898 (Trematoda, Rhopaliasidae)

Gomes, Delir Corrêa; Vicente, Joaquim Júlio

doi:10.1590/s0074-02761972000200001

Cited by 4 publications

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“…Trichuris didelphis was previously recorded only for Didelphis virginiana (Babero, 1960) and D. albiventris (Silva and Costa, 1999; Antunes, 2005). Globocephalus marsupialis was previously reported only in Philander frenatus (Freitas and Lent, 1936), as well as the helminth R. coronatus (Gomes and Vicente, 1972). The latter was also reported in D. aurita (Gomes, 1977).…”

Section: Discussionmentioning

confidence: 99%

Metacommunity structure of the helminths of the black-eared opossumDidelphis auritain peri-urban, sylvatic and rural environments in south-eastern Brazil

et al. 2018

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Among the Brazilian marsupials, the species of the genus Didelphis are the most parasitized by helminths. This study aimed to describe the species composition and to analyse the helminth communities of the Atlantic Forest common opossum Didelphis aurita at infracommunity and component community levels using the Elements of Metacommunity Structure Analysis, considering peri-urban, sylvatic and rural environments in the state of Rio de Janeiro, Brazil. Seventy-three specimens of D. aurita were captured during the study. Fourteen species of helminths were collected: nine of the phylum Nematoda (Trichuris minuta, Trichuris didelphis, Globocephalus marsupialis, Heterostrongylus heterostrongylus, Travassostrongylus orloffi, Viannaia hamata, Aspidodera raillieti, Cruzia tentaculata and Turgida turgida); four of the phylum Platyhelminthes (three species of Trematoda, Duboisiella proloba, Brachylaima advena and Rhopalias coronatus, and one species of the class Cestoda); and one species of the phylum Acanthocephala (Oligacanthorhynchus microcephalus). More than 95% of the animals were infected with parasites. The most abundant parasite species were V. hamata, T. turgida, C. tentaculata and T. orloffi. The nematodes T. turgida, C. tentaculata and A. raillieti were the most dominant species in the three environments. The analysis of the metacommunity structure indicated a structured pattern as a function of the environmental gradient, but only when all localities were considered together. At the infracommunity and component community levels, quasi-nested and nested structures with stochastic species loss were observed, respectively. The results indicate that the settlement of helminth species in the opossums can be attributed to the heterogeneity among individual hosts in relation to their exposure to parasites and to extrinsic factors, which vary among habitats, considering a regional scale. On a local scale, the characteristics of this host species may promote homogenization among individual hosts in terms of their exposure to the helminths. This study constitutes a new host record for the species G. marsupialis and T. didelphis and represents a pioneering investigation of the helminth metacommunity of a Neotropical marsupial.

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Section: Discussionmentioning

confidence: 99%

Metacommunity structure of the helminths of the black-eared opossumDidelphis auritain peri-urban, sylvatic and rural environments in south-eastern Brazil

et al. 2018

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“…There is no mention by Braun (1901) or by Gomes and Vicente (1972), of spines flanking the oral sucker in this species. However, the figures provided by Gomes and Vicente (1972) depicting this species clearly indicate the presence of flanking spines.…”

Section: Remarksmentioning

confidence: 74%

“…However, the figures provided by Gomes and Vicente (1972) depicting this species clearly indicate the presence of flanking spines. This observation is repeated in their Table 1.…”

Section: Remarksmentioning

confidence: 91%

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A Review of Species in the Genus Rhopalias (Rudolphi, 1819)

Haverkost¹,

Gardner²

2008

Journal of Parasitology

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confidence: 74%

A Review of Species in the Genus Rhopalias (Rudolphi, 1819)

Haverkost¹,

Gardner²

2008

J Parasitol

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Currently, there are 6 recognized species in the genus Rhopalias. These parasites are found in the small intestines of numerous species of marsupials throughout North and South America. Small mistakes in various classical taxonomic works have given rise to recent and numerous misidentifications of these species. In this work, we examine a total of 99 specimens across all species from museum collections in an attempt to determine informative taxonomic characters to distinguish these species. Despite confusion in the literature, accurate identification of these species can be achieved by observing the presence or absence of oral and flanking spines anterior to the oral sucker. Species of Rhopalias (Trematoda: Rhopalidae) occur in the small intestines of marsupials throughout the Nearctic and Neotropical regions. Six species are currently recognized as valid. Rudolphi (1819) described Distoma coronatum from Didelphis marsupialis Linnaeus, 1758 collected by Johann Natterer in Brazil. Diesing (1850) described Rhopalophorus horridus from Chironectes minimus (Zimmermann, 1780) also collected by Natterer. Stiles and Hassall (1898) recognized that Rhopalophorus was an occupied name, and renamed the genus Rhopalias. Braun (1901) provided formal descriptions of both previously described species, and recognized and described another species, Rhopalias baculifer, from the same material examined by Diesing (1850). Chandler (1932) described Rhopalias macracanthus from North America in Didelphis virginiana Kerr, 1792. Kifune and Uyema (1982) described Rhopalias caballeroi from D. marsupialis and Philander opossum (Linnaeus, 1758) in Brazil. Finally, Rivallis et al. (2004) described the most recent species in this genus, Rhopalias caucensis from P. opossum collected in Colombia. Skrjabin (1948) reproduced the descriptions of the species in the genus and provided an identification key to the known species of Rhopalias in that work, it is apparent that the labels for the figures referring to R. baculifer and R. horridus were reversed. Travassos et al. (1969) reproduced the work of Skrjabin (1948), along with the mislabeled figures. In the summary work of Yamaguti (1971), Figure 1651 of Rhopalias coronatus is a reproduction of R. horridus after Caballero (1946); this figure is in fact a representation of the currently recognized species R. caballeroi. In the same work (Yamaguti, 1971), Figure 1650B of R. coronatus, after Caballero (1946), but attributed to Braun (1901), also appears to be a drawing of R. caballeroi, but because the tentacles are covering the area where flanking spines would be found, identification to species is not possible from the Figure (although it is likely R. caballeroi). Finally, Radev et al. (2005) offer original figures of R. macracanthus drawn from specimens stored in the Manter Laboratory of Parasitology (HWML 0844, 22422, 22423). These specimens have been verified by 1 of us (T.R.H.) as R. macracanthus, but the figures of these specimens in Radev et al. (2005) lack the defining flanking spines, making t...

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Estudo do gênero Rhopalias stiles & Hassall, 1898 (Trematoda, Rhopaliasidae)

Cited by 4 publications

References 0 publications

Metacommunity structure of the helminths of the black-eared opossumDidelphis auritain peri-urban, sylvatic and rural environments in south-eastern Brazil

Metacommunity structure of the helminths of the black-eared opossumDidelphis auritain peri-urban, sylvatic and rural environments in south-eastern Brazil

A Review of Species in the Genus Rhopalias (Rudolphi, 1819)

A Review of Species in the Genus Rhopalias (Rudolphi, 1819)

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