On brazilian supralittoral and brackish water snails

Marcus, Ernst

doi:10.1590/s0373-55241963000200004

Cited by 9 publications

(4 citation statements)

References 7 publications

(1 reference statement)

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“…Genus Potamolithus is dioecious, the penis is simple, variable in pigmentation among taxa 87–92 ; the females of some species develop a nuchal node 88–90 . In contrast to Heleobia and Potamolithus , whose species are oviparous 18,19,82,93,94 , the mudsnail is ovoviviparous, with females brooding small juvenile in the pallial oviduct 25,26,32,33,41 . To determine the presence of embryos or juveniles in the brood pouches, the oviduct wall was dissected and examined using a stereomicroscope.…”

Section: Methodsmentioning

confidence: 94%

Morphological and molecular analysis of cryptic native and invasive freshwater snails in Chile

Collado

Vidal

Aguayo

et al. 2019

Sci Rep

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Species delimitation in minute freshwater snails is often difficult to perform using solely shell morphology. The problem intensifies when invasive species spread within the distribution range of morphologically similar native species. In Chile, the Truncatelloidean snails are represented by the native genera Heleobia and Potamolithu s plus the invasive mudsnail Potamopyrgus antipodarum , which can easily be confused. Using an integrative approach, we performed molecular phylogenetic analysis and studied reproductive and morphological features to identify superficially similar forms inhabiting the central area of the country. Truncatelloidean snails were identified in 40 of 51 localities sampled, 10 containing Potamopyrgus antipodarum , 23 Heleobia and 7 Potamolithus . Based on these results and previously published data, the known distribution of the mudsnail in Chile encompasses 6 hydrological basins, including 18 freshwater ecosystems. The finding of the mudsnails in several type localities of native species/subspecies of “ Heleobia ” that were not find in situ suggests species replacement or significant extinction of native fauna, a hypothesis supported by the restudy of type material that shows that endemic forms belong to the genus Potamolithu s. This study shows the usefulness of integrative taxonomy not only resolving complex taxa with cryptic morphology but also measuring the extent of an ongoing invasion.

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Section: Methodsmentioning

confidence: 94%

Morphological and molecular analysis of cryptic native and invasive freshwater snails in Chile

Collado

Vidal

Aguayo

et al. 2019

Sci Rep

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“…Heleobia charruana (d'Orbigny, 1840) and H. australis have indirect development. This last species attaches single egg capsules to living shells and opercula of conspecifics from which a free-swimming veliger larva hatches 5 days post-oviposition (Marcus & Marcus, 1963). The veliger has a simple bilobed velum, suggesting a short pelagic larval life (Neves, Valentin & Figueiredo, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The veliger has a simple bilobed velum, suggesting a short pelagic larval life (Neves, Valentin & Figueiredo, 2010). In H. charruana, free-swimming larvae hatch 10 days post-oviposition, remaining among the aquatic plants (Marcus & Marcus, 1963) by which they can be dispersed by rafting; that would not be the case of H. atacamensis.…”

Section: Discussionmentioning

confidence: 99%

Reproductive aspects of the poorly known and critically endangered freshwater snailHeleobia atacamensis(Gastropoda: Truncatelloidea)

Collado

Chihuailaf²,

Muñoz-Herrera³

et al. 2021

PeerJ

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Knowing the reproductive biology of threatened species is essential for conservation and to establish proper management plans. Heleobia atacamensis, a freshwater snail only known from two locations in the Atacama Saltpan, northern Chile, is currently classified as Data Deficient on the IUCN Red List and Critically Endangered by the Ministerio del Medio Ambiente of Chile. Based on size-frequency distribution, multivariate analysis of shell measurements, and microdissections, we studied the reproductive strategy, recruitment period, sex ratio and sexual dimorphism in this species. Heleobia atacamensis is an oviparous species, with direct development (non-planktotrophic). Females lay capsules of a single egg from which a juvenile resembling a miniature adult hatches after intracapsular metamorphosis is completed. The development type was confirmed by the observation of a paucispiral protoconch (= protoconch I) using scanning electron microscopy. Recruitment was observed across the four seasons of the year, with an increment at the end of austral summer. Results also showed that sex ratio was 1:1, whereas sexual dimorphism was not detected using univariate and multivariate analysis of the shell. The reproductive data provided in this study are a starting point for future management plans.

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“…MARTENS (1868), KLEEREKOPER (1944KLEEREKOPER ( , 1949KLEEREKOPER ( , 1955, MARCUS & MARCUS (1963), CHOMENKO & SCHÄFER (1984a, b), LANZER & SCHÄFER (1985), SILVA (1993) e LANZER (2001 registram cinco espécies para a planície costeira do Rio Grande do Sul a seguir citadas com suas respectivas localidadestipo: Heleobia australis (Orbigny, 1835), Montevideo, Uruguai; H. parchappei (Orbigny, 1835), Argentina; H. charruana (Orbigny, 1840), Uruguai; Potamolithus catharinae Pilsbry, 1911, Ibirama, Santa Catarina, Brasil; e Potamolithus ribeirensis Pilsbry, 1911, Iporanga, São Paulo, Brasil. É proposta uma nova espécie de Heleobia para a planície costeira do Rio Grande do Sul.…”

Section: Introductionunclassified

Nova espécie de Heleobia (Rissooidea, Hydrobiidae) da planície costeira do sul do Brasil

Silva

Veitenheimer-Mendes

2004

Iheringia, Sér. Zool.

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On brazilian supralittoral and brackish water snails

Cited by 9 publications

References 7 publications

Morphological and molecular analysis of cryptic native and invasive freshwater snails in Chile

Morphological and molecular analysis of cryptic native and invasive freshwater snails in Chile

Reproductive aspects of the poorly known and critically endangered freshwater snailHeleobia atacamensis(Gastropoda: Truncatelloidea)

Nova espécie de Heleobia (Rissooidea, Hydrobiidae) da planície costeira do sul do Brasil

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