Mating behaviour and copulatory mechanics in six species of Planorbidae (Gastropoda: Pulmonata)

Soldatenko, E.V.; Petrov, A.A.

doi:10.1093/mollus/eyr056

Cited by 14 publications

(14 citation statements)

References 34 publications

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“…The confocal study of the copulatory musculature shows that the penis exhibits several distinct patterns in muscle arrangement, which are in good agreement with both morphological and molecular Armiger crista) and two previously examined species: Anisus vortex and Bathyomphalus contortus (Soldatenko & Petrov, 2012). The penis with the inner and outer longitudinal layers is also characteristic of two species of Segmentinini: Segmentina oelandica and Hippeutis complanatus (Soldatenko & Petrov, 2009, 2012. As Segmentinini and Planorbini (i.e., Planorbinae) are nested deep within Hygrophila and…”

Section: Discussionsupporting

confidence: 86%

“…was examined by phalloidin staining and confocal microscopy. This study also supplemented previously published observations on the penial musculature of Planorbis planorbis and Choanomphalus riparius (Soldatenko & Petrov, ). To test the congruity of molecular and morphological evidence, we constructed a molecular phylogeny of Hygrophila based on the concatenated COI and 18S data set with an emphasis on the species used in the morphological analysis.…”

Section: Introductionsupporting

confidence: 88%

“…angulatus , Ch. eurystomus , Gyraulus albus , Anisus leucostoma, and Armiger crista ) and two previously examined species: Anisus vortex and Bathyomphalus contortus (Soldatenko & Petrov, ). The penis with the inner and outer longitudinal layers is also characteristic of two species of Segmentinini: Segmentina oelandica and Hippeutis complanatus (Soldatenko & Petrov, , , ).…”

Section: Discussionmentioning

confidence: 98%

“…eurystomus , Gyraulus albus , Anisus leucostoma, and Armiger crista ) and two previously examined species: Anisus vortex and Bathyomphalus contortus (Soldatenko & Petrov, ). The penis with the inner and outer longitudinal layers is also characteristic of two species of Segmentinini: Segmentina oelandica and Hippeutis complanatus (Soldatenko & Petrov, , , ). As Segmentinini and Planorbini (i.e., Planorbinae) are nested deep within Hygrophila and Planorbinae are strongly supported as monophyletic in the molecular analysis (Albrecht et al, ; this study), the arrangement with the inner and outer longitudinal muscles appears to be derived and synapomorphic for this group (apomorphies 6 and 7, Figure ), while that with the inner and outer circular muscles is symplesiomorphic or synapomorphic for Hygrophila in general.…”

Section: Discussionmentioning

confidence: 98%

“…To test the congruity of molecular and morphological evidence, we constructed a molecular phylogeny of Hygrophila based on the concatenated COI and 18S data set with an emphasis on the species used in the morphological analysis. The characters of the penial musculature for these species along with those from previously examined Hygrophila (Soldatenko & Petrov, , , ) were mapped onto the molecular phylogenetic tree to identify the ancestral character states and make inferences about evolution of the musculature of the penial complex.…”

Section: Introductionmentioning

confidence: 99%

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Musculature of the penial complex: A new criterion in unravelling the phylogeny of Hygrophila (Gastropoda: Pulmonata)

Soldatenko

Petrov

2019

Journal of Morphology

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The taxonomy of freshwater pulmonates (Hygrophila) has been in a fluid state warranting the search for new morphological criteria that may show congruence with molecular phylogenetic data. We examined the muscle arrangement in the penial complex (penis and penis sheath) of most major groups of freshwater pulmonates to explore to which extent the copulatory musculature can serve as a source of phylogenetic information for Hygrophila. The penises of Acroloxus lacustris (Acroloxidae), Radix auricularia (Lymnaeidae), and Physella acuta (Physidae) posses inner and outer layers of circular muscles and an intermediate layer of longitudinal muscles. The inner and outer muscle layers in the penis of Biomphalaria glabrata consist of circular muscles, but this species has two intermediate longitudinal layers separated by a lacunar space, which is crossed by radial and transverse fibers. The muscular wall of the penis of Planorbella duryi is composed of transverse and longitudinal fibers, with circular muscles as the outer layer. In Planorbidae, the penial musculature consists of inner and outer layers of longitudinal muscles and an intermediate layer of radial muscles. The penis sheath shows more variation in muscle patterns: its muscular wall has two layers in A. lacustris, P. acuta, and P. duryi, three layers in R. auricularia and Planorbinae and four layers in B. glabrata. To trace the evolution of the penial musculature, we mapped the muscle characters on a molecular phylogeny constructed from the concatenated 18S and mtCOI data set. The most convincing synapomorphies were found for Planorbinae (inner and outer penis layers of longitudinal muscles, three‐layered wall of the penis sheath). A larger clade coinciding with Planorbidae is defined by the presence of radial muscles and two longitudinal layers in the penis. The comparative analysis of the penial musculature appears to be a promising tool in unraveling the phylogeny of Hygrophila.

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Section: Discussionsupporting

confidence: 86%

Section: Introductionsupporting

confidence: 88%