The influence of habitat preferences on shell morphology in ecophenotypes of Trochulus hispidus complex

Proćków, Małgorzata; Proćków, Jarosław; Błażej, Paweł; Mackiewicz, Paweł

doi:10.1016/j.scitotenv.2018.02.311

Cited by 17 publications

(20 citation statements)

References 39 publications

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“…Also, despite the large genetic variability in COI, our results of molecular species delimitation analyses suggest that both these forms constitute a single species, similar to previously recorded scenarios for montane snail species (e.g., Harl et al 2014). In many molluscan species, remarkable morphological divergence is demonstrated as the result of interactions between environment/climate and phenotypic plasticity (e.g., Chiba 2004;Pascoal et al 2012;Inoue et al 2013;Proćków et al 2017bProćków et al , 2018. F. faustina may represent a similar case in which populations differ in shell morphology.…”

Section: Phylogeography and Taxonomic Considerationssupporting

confidence: 86%

“…For instance, a successful delimitation of cryptic taxa in sea slugs was demonstrated using geographical data combined with molecular markers and morpho-anatomy (Carmona et al 2011). On the other hand, a unique combination of morphological and genetic studies with cross-breeding effects of different morphological species, as well as an assessment of the extent of the environmental impact on species and populations, revealed that the land snails Trochulus hispidus (Linnaeus, 1758) and T. sericeus (Draparnaud, 1801) are ecophenotypes and do not represent biological species (Proćków et al 2017a;Proćków et al 2018). There are no data on specific habitat preferences for distinct Faustina forms.…”

Section: Phylogeography and Taxonomic Considerationsmentioning

confidence: 99%

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Phylogeography and potential glacial refugia of terrestrial gastropod Faustina faustina (Rossmässler, 1835) (Gastropoda: Eupulmonata: Helicidae) inferred from molecular data and species distribution models

et al. 2020

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Faustina faustina is a conchologically highly diverse forest gastropod with several morphological forms. It is a Carpathian species, but it also occurs in northern isolated localities, where it was probably introduced. We performed the first phylogeographic analysis of 22 populations, based on three molecular markers: COI, ITS-2, and 28S rRNA. Genetic data were complemented by paleo-distribution models of spatial occupancy during the Last Glacial Maximum to strengthen inferences of refugial areas. We discovered high genetic variability of COI sequences with p-distances between haplotypes ranged from 0.2 to 18.1% (6.3–16.6% between clades). For nuclear markers, a haplotype distribution pattern was revealed. Species distribution models indicated a few potential refugia in the Carpathians, with the most climatically stable and largest areas in the Southern Carpathians. In some climate scenarios, putative microrefugia were also predicted in the Western and Eastern Carpathians, and in the Apuseni Mts. Our results suggest the glacial in situ survival of F. faustina and its Holocene expansion in the Sudetes. Although our genetic data as well as shell phenotypes showed considerable variation within and between studied populations, the molecular species delimitation approaches still imply only one single species. Our study contributes to the understanding of the impact of processes on shaping contemporary population genetic structure and diversity in low-dispersal, forest species.

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Section: Phylogeography and Taxonomic Considerationssupporting

confidence: 86%

Section: Phylogeography and Taxonomic Considerationsmentioning

confidence: 99%

Phylogeography and potential glacial refugia of terrestrial gastropod Faustina faustina (Rossmässler, 1835) (Gastropoda: Eupulmonata: Helicidae) inferred from molecular data and species distribution models

et al. 2020

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“…Disregarding the incorrect assignment of the samples, these results can be interpreted into two ways. Following our previous findings, showing the influence of local environment on shell shape in Trochulus taxa (Proćków et al, 2017a(Proćków et al, , 2017b(Proćków et al, , 2018, we can assume that these outstanding cases represent individuals genetically related with others in the population but having different shell morphology due to such a phenotypic plasticity and the environmental influence. It means that the same or similar shell morphology can occur independently in different genetic lineages.…”

Section: Intermixed Specimenssupporting

confidence: 68%

“…Furthermore, T. hispidus and T. sericeus appeared to be phenotypically plastic and showed no interbreeding constraints (Proćków et al., 2017a). Since their shell morphology strictly depends on microhabitat, they were regarded ecophenotypes (Proćków et al., 2018). The genus Trochulus appears to have a complex evolutionary history, which includes frequent interspecific gene flow and permeable species barriers (Proćków et al., 2017c).…”

Section: Introductionmentioning

confidence: 99%

Speciation in sympatric species of land snails from the genus Trochulus (Gastropoda, Hygromiidae)

et al. 2020

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The identification and designation of land snail species in the genus Trochulus on the basis of shell characteristics are problematic because of their great phenotypic plasticity. Some genetic analyses have proved inconclusive, with much variation within populations and apparent gene flow among them. We examined this issue by morphometric and molecular approaches on the morphologically similar species T. coelomphala, T. hispidus and T. striolatus, co‐occurring in the Alpenvorland of Germany. While these species differed in shell and reproductive system morphology, there were forms that turned out intermediate in shell characters between T. coelomphala and T. hispidus but had genital morphology similar to T. coelomphala. Phylogenetic analysis, however, showed that these forms clustered neither with T. coelomphala nor T. hispidus but are sister to T. striolatus from the same region, which suggests that they evolved by way of sympatric speciation. Further, these analyses suggest that T. coelomphala diverged within T. hispidus; a crossing experiment indicated that they were interfertile. Expanding the study to include all available Trochulus sequences enabled us to infer evolutionary relationships between them and showed that T. hispidus is polyphyletic. Some Trochulus samples of one nominal species were grouped within others. The combination of phenotypic plasticity and possible mitochondrial DNA introgression illustrates the complex nature of evolutionary processes and the need for caution in the application of traditional taxonomic practice.

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“…In adult stage, the shell is 5.5–10.0 mm in width and 3.0–6.7 mm in height. The snails usually possess short hairs (0.20–0.31 mm) that often are lost in adult specimens (Proćków et al , 2018). Trochulus villosulus —a rare West‐Carpathian species, that prefers humid habitats in mountains up to 1,600 m a.s.l.…”

Section: Methodsmentioning

confidence: 99%

The frictional and adhesive properties of the shells of terrestrial hairy snails

2019

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Hair‐like structures of the shell in some terrestrial snails have been suggested to represent an adaptive advantage. One of the recently proposed explanations was the hypothesis that the possession of hairs facilitates the snails' adherence to the leaves of the plants during foraging, when humidity levels are high. In order to obtain some reliable data to test this contact mechanics hypothesis, the present paper deals with the frictional and adhesive properties of the smooth and hairy shells of two species of terrestrial mollusks, Trochulus hispidus and T. villosulus. Additionally, actively generated traction force of the snails was measured on different substrates. The conducted experiments revealed that in wet conditions the hairiness indeed increases friction and that adhesion through the water film is high enough to retain the weight of the snail. However, possession of long hairs decreases the adhesion, in comparison with the animals with short hairs. Our data suggest that hair‐like structures require more energy expenditure during locomotion and only provide the advantage of higher adhesion on wet substrates. Obtained maximal traction forces were about 30 times higher than friction forces of the shell surface dragged over the substrate. Neither wetting condition of the substrate nor surface roughness had considerable effect on the traction forces of snails. Therefore, the function of the hair‐like structures seems not to be related with snail locomotion and adhesion.

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The influence of habitat preferences on shell morphology in ecophenotypes of Trochulus hispidus complex

Cited by 17 publications

References 39 publications

Phylogeography and potential glacial refugia of terrestrial gastropod Faustina faustina (Rossmässler, 1835) (Gastropoda: Eupulmonata: Helicidae) inferred from molecular data and species distribution models

Phylogeography and potential glacial refugia of terrestrial gastropod Faustina faustina (Rossmässler, 1835) (Gastropoda: Eupulmonata: Helicidae) inferred from molecular data and species distribution models

Speciation in sympatric species of land snails from the genus Trochulus (Gastropoda, Hygromiidae)

The frictional and adhesive properties of the shells of terrestrial hairy snails

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