Observações sobre o genero Urogonimus e uma nova fórma de Leucochloridium em novo hospedador

Lutz, Adolpho

doi:10.1590/s0074-02761921000100002

Cited by 15 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Succineid snails, including the genus Omalonyx, are known to be intermediate hosts of trematodes of the family Leucochloridiidae (Lutz 1921;Casey et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Angiostrongylus costaricensis (Nematoda: Protostrongylidae): migration route in experimental infection of Omalonyx sp. (Gastropoda: Succineidae)

Montresor

Vidigal

Mendonça³

et al. 2008

Parasitol Res

View full text Add to dashboard Cite

Angiostrongylus costaricensis can infect several mollusks, and its migration route in intermediate hosts has been studied only in Sarasinula marginata. To verify the susceptibility of Omalonyx sp. as an intermediate host of A. costaricensis and to analyze the nematode migration route, individuals were infected with stage 1 larvae. Obtained stage 3 larvae were orally inoculated in mice, and after 30 days, adult worms and stage 1 larvae were recovered, demonstrating Omalonyx susceptibility and suitability to infection. To define the parasite migration routes, specimens of Omalonyx with 30 min, 1 h, 2 h, 4 h, 6 h, 8 h, 2 days, 5 days, 10 days, 12 days, 15 days, 20 days, 21 days, 25 days, 28 days, and 30 days of infection were fixed and serially sectioned. Histological sections were stained with hematoxylin-eosin. The results were compared to those described in S. marginata. Oral and cutaneous infections were noted. After the penetration, larvae were retained, mainly in the fibromuscular tissue, by hemocytes, or they spread to the whole organism through the circulation, following the anatomical structure of the vasculature. The perilarval hemocyte reaction in Omalonyx was more intense until stage 2 larva instar, decreasing in the presence of stage 3 larvae. Differences in some aspects of hemocyte reaction between S. marginata and Omalonyx exemplify interspecific peculiarities in snail response to the same parasite.

show abstract

“…Succineid snails, including the genus Omalonyx, are known to be intermediate hosts of trematodes of the family Leucochloridiidae (Lutz 1921;Casey et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Angiostrongylus costaricensis (Nematoda: Protostrongylidae): migration route in experimental infection of Omalonyx sp. (Gastropoda: Succineidae)

Montresor

Vidigal

Mendonça³

et al. 2008

Parasitol Res

View full text Add to dashboard Cite

show abstract

“…The genus Omalonyx d'Orbigny, 1837, includes neotropical semi‐aquatic succineids exhibiting a slug form and reduced shell (Tillier, ). They are known as natural intermediate hosts for bird flukes of the genus Leucochloridium Carus, 1835 (Digenea: Leucochloriidae) (Lutz, ; Travassos, ), and are experimental hosts for the roundworm genus of medical and veterinary importance, Angiostrongylus Kamensky, 1905 (Nematoda: Metastrongylidae) (Montresor et al., ; Mozzer, Montresor, Vidigal, & Lima, ). These slugs were also reported as agricultural pests (Garcia, Arruda, Pimpão, & Batista, ; Olazarri, ).…”

Section: Introductionmentioning

confidence: 99%

Integrative taxonomy of the neotropical genus Omalonyx (Elasmognatha: Succineidae)

et al. 2018

View full text Add to dashboard Cite

The genus Omalonyx d'Orbigny, 1837, includes neotropical semi‐aquatic succineid slugs and comprises six recognized species to date. Field surveys across continental South America recovered five of the six recognized species. According to the morphological characters traditionally included in Omalonyx descriptions, the specimens were tentatively identified as O. matheroni, O. pattersonae, O. convexus, O. geayi and O. unguis. Employing sequences of mitochondrial cytochrome oxidase I (COI) alone or combined with the nuclear second internal transcribed spacer (ITS2) in discovery methods of species delimitation (GMYC and STACEY) led to species delimitation hypotheses that, except for unambiguously supporting O. convexus, have no correspondence to morphologically based assignments. To choose the delimitation model that best fit our data, the hypotheses recovered by GMYC, STACEY and morphology and created by merging species recovered by those methods had their marginal likelihood estimated and compared using the Bayes factors. The best‐supported hypothesis distinguished two species besides O. convexus: one widespread over most of South America and the other restricted to Rio de Janeiro State, Brazil. Furthermore, the pattern of genetic structuring supports pathways connecting the Amazonian and Atlantic forests. This pattern is similar to that observed in terrestrial taxa (e.g., forest‐dwelling small mammals) and is different from the pattern for fully aquatic taxa.

show abstract

“…In the 20 th century, specimens of Omalonyx infected by Leucochloridium, an avian trematode, were found by Lutz (1921) in the surroundings of the institute where he used to work in Rio de Janeiro city, Rio de Janeiro State. The author also reported that this slug is abundant in the north of Brazil.…”

Section: Literature Review: Omalonyx In Brazilmentioning

confidence: 99%

“…They can act as agricultural plagues (Olazarri 1979, Garcia et al 2012 and are agents in the control of water-cress (Poi de Neiff et al 1977). They can also act as intermediate hosts of an avian trematode, Leucochloridium (Lutz 1921, Travassos 1928, in the wild and of the nematodes Angiostrongylus costaricensis and A. vasorum in the laboratory (Montresor et al 2008, Mozzer et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Predicting the distribution of Omalonyx (Mollusca: Pulmonata: Succineidae) species from literature review, museum databases and new sampling efforts in Brazil

et al. 2018

View full text Add to dashboard Cite

Accurate distributional information is crucial for studies on systematics, biodiversity and conservation. To improve the knowledge regarding the geographical distribution of Omalonyx in South America, we present updated information based on data from a literature review, institutional collections and malacological surveys. All this information composed the dataset used to predict species distribution employing the Maximum Entropy Algorithm (MaxEnt). The model was run using data on species distribution, altitude and bioclimatic variables (WorldClim database). The model had consistent performance, and areas presenting similar conditions to areas where the species were recorded were considered areas of occurrence. The predicted occurrence areas included those that were already surveyed and those that are considered potential occurrence areas. The results demonstrate that the genus has widespread distribution in the Neotropical region and occurs in the tropical, temperate and arid regions of South America and Lesser Antilles. Omalonyx spp. were recorded in all South American countries and hydrographic regions. However, in some countries, there were only isolated records (ex: Colombia and Ecuador). Here, we also present the first record of Omalonyx spp. in four Brazilian States (Acre, Rondônia, Piaui, and Amapá). The genus was found in all hydrographic regions within Brazil and among 27 federative unities; it was absent from only two unities (Roraima State and Distrito Federal). This work contributes to the knowledge on Omalonyx spp. distribution and provides an important basis for the work of ecologists and taxonomists.

show abstract

Observações sobre o genero Urogonimus e uma nova fórma de Leucochloridium em novo hospedador

Cited by 15 publications

References 0 publications

Angiostrongylus costaricensis (Nematoda: Protostrongylidae): migration route in experimental infection of Omalonyx sp. (Gastropoda: Succineidae)

Angiostrongylus costaricensis (Nematoda: Protostrongylidae): migration route in experimental infection of Omalonyx sp. (Gastropoda: Succineidae)

Integrative taxonomy of the neotropical genus Omalonyx (Elasmognatha: Succineidae)

Predicting the distribution of Omalonyx (Mollusca: Pulmonata: Succineidae) species from literature review, museum databases and new sampling efforts in Brazil

Contact Info

Product

Resources

About