Morphological Traits of the Radula in Viviparidae (Mollusca, Caenogastropoda) as a Master Key to Discrimination of Closely Related Species

Anistratenko, Vitaliy V.; Ryabceva, Yu. S.; Degtyarenko, E. V.

doi:10.2478/vzoo-2013-0014

Cited by 8 publications

(4 citation statements)

References 2 publications

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“… Steneck and Watling, 1982 ; Hawkins et al, 1989 ), but overall morphology of the radula and its teeth is a valuable character in taxonomy and systematics (e.g. Anistratenko et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Not just scratching the surface: Distinct radular motion patterns in Mollusca

et al. 2020

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The radula is the organ for mechanical food processing and an important autapomorphy of Mollusca. Its chitinous membrane, embedding small radular teeth, is moved by the set of muscles resulting in an interaction with the ingesta, tearing it and collecting loosened particles. Radulae and their teeth can be quite distinct in their morphology and had been of high research interest, but only few studies have examined the basic functional principles of this organ, the movement and motion during feeding action. Here, the radular motion of 20 representative species, belonging to four major gastropod lineages (Vetigastropoda, Neritimorpha, Caenogastropoda, Heterobranchia) and Polyplacophora, were recorded and classified. Comparisons of the video footage with the SEM images of the radula resulted in the recognition of functional tooth rows and the correct position of the teeth during feeding. We identified six different types of radular movements, including rotations and bending of the radula itself. In each movement type, different structures act as counter bearings enabling the animals to grab and tear food.

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Section: Introductionmentioning

confidence: 99%

Not just scratching the surface: Distinct radular motion patterns in Mollusca

et al. 2020

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“…In literature the name Contectiana is usually ranking as subgenus of Viviparus or its synonym and thus Cyclostoma contectum Millet, 1813 is respectively called "Viviparus contectus" meaning close relationships with Viviparus viviparus (e. g. Falkner et al, 2001; Welter-Schultes, 2012). However, "viviparus" and "contectus" clearly diff erentiate from each other not only in conchology (Zilch, 1955) but in morphology of embryo shell (Riedel, 1993;Ryabceva, Anistratenko, 2012;Glöer, Georgiev, 2014), caryology (Rainer, 1963;Pavluchenkova, 1997;Andriichuk, Garbar, 2015) and radula morphology (Falniowski et al, 1996;Anistratenko et al, 2013). In our opinion the data available allow to reclassify "contecta" into its own genus, Contectiana.…”

Section: Genus Contectiana Bourguignat 1880mentioning

confidence: 80%

A Review of Species Diversity, Distribution and Ecology of Freshwater Gastropod Molluscs Inhabiting the Ukrainian Transcarpathian

et al. 2019

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The diversity of freshwater gastropods recorded in the Transcarpathian Region of Ukraine is reviewed and comments on their distribution and ecology are provided. Thirty-five species were revealed in samples collected from the lowland and mountainous parts of the Ukrainian Transcarpathia. Three species are recorded for the first time in the regional fauna: Viviparus sphaeridius, Bithynia troschelii and Segmentina montgazoniana. For species found in the region brief remarks on the biotopes in which they were registered and relevant taxonomic comments are given. The most distinctive features of the mollusc fauna of Ukrainian Transcarpathia are considered; the presence as well as the absence of some taxa in comparison with adjacent regions is discussed. The results of our observations confirm that the distribution of gastropod species depends on the types of waterbodies and their altitude location. The presented data contribute to the knowledge of the regional malacofauna and should help to assess the biogeographic status of the Transcarpathian Region more clearly.

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“…Natural wear has been documented in various molluscan species [6,8,10,24,44,[59][60][61][62][63][64][65], but wear-causing agents have not been reported in these publications.…”

Section: Discussionmentioning

confidence: 99%

Feeding Experiments on Vittina Turrita (Mollusca, Gastropoda, Neritidae) Reveal Tooth Contact Areas and Bent Radular Shape During Foraging

Krings

Hempel

SIEMERS

et al. 2021

Preprint

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The radula is the food gathering and processing structure and one important autapomorphy of the Mollusca. It is composed of a chitinous membrane with small, embedded teeth representing the interface between the organism and its ingesta. In the past, various approaches aimed at connecting the tooth shapes, which are highly distinct within single radulae due to their different functions. However, conclusions from the literature have been mainly drawn from microscopical analyses of mounted radulae, but the real interacting radular parts – even though the precise contact areas are essential for determining a tools functionality – and the 3D architecture of this complex feeding structure have not been previously determined. In the experimental approach presented here individuals of Vittina turrita (Neritidae, Gastropoda) were fed with algae paste attached to different sandpaper types. By comparison with radulae from a control group, sandpaper-induced tooth wear patterns were identified and both the area and volume loss were quantified. In addition to the exact contact area of each tooth, conclusions about the 3D position of teeth and the radular bending during feeding motion could be drawn. Furthermore, hypotheses about the specific functions of individual tooth types could be put forward. This kind of feeding experiments under controlled conditions is new for Mollusca and may provide a good basis for future studies on the radula functional morphology. It can be potentially applied to species with distinct tooth morphologies and ecological niches.

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Morphological Traits of the Radula in Viviparidae (Mollusca, Caenogastropoda) as a Master Key to Discrimination of Closely Related Species

Cited by 8 publications

References 2 publications

Not just scratching the surface: Distinct radular motion patterns in Mollusca

Not just scratching the surface: Distinct radular motion patterns in Mollusca

A Review of Species Diversity, Distribution and Ecology of Freshwater Gastropod Molluscs Inhabiting the Ukrainian Transcarpathian

Feeding Experiments on Vittina Turrita (Mollusca, Gastropoda, Neritidae) Reveal Tooth Contact Areas and Bent Radular Shape During Foraging

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