Abstract
1. Asami T., Cowie R. H., Ohbayashi K. 1998. Evolution of mirror images by sexually asymmetric mating behavior in hermaphroditic snails. American Naturalist 152: 225–236. https://doi.org/10.1086/286163. CrossRef Google Scholar
Highlights
Here we report a single sinistral juvenile shell of Helicopsis cf. instabilis (Rossmässler), which was found in the Urluia loess section in south-eastern Romania
We can assume that the mutation rate at the left-right polarity determinant locus is equivalent in all land snail groups, we encounter reverse-coiled shells more frequently in high-spired, than in flat or globular shelled species
To provide further information for this topic, we report a single sinistral (Figs 1–2) shell of the genus Helicopsis Fitzinger, 1833 which was found during the examination of fossil shell samples from the Urluia loess section (44°05'39.9"N, 27°54'11.1"E, 125 m a.s.l) in south-eastern Romania, where we sampled an 860 cm long profile continuously every 5 centimetres in the spring of 2019; it approximately comprises the last 45 ka
Summary
We report a single sinistral juvenile shell of Helicopsis cf. instabilis (Rossmässler), which was found in the Urluia loess section in south-eastern Romania. Sweden (e-mails: yunus.baykal@geo.uu.se, thomas.stevens@geo.uu.se); YB https://orcid.org/0000-0002-9192-9944 3Romanian Academy, Institute of Speleology, Clinicilor 5, 400006 Cluj-Napoca, Romania (e-mail: dsveres@gmail.com); https://orcid.org/0000-0003-3932-577X 4BayCEER & Chair of Geomorphology, University of Bayreuth, 94450 Bayreuth, Germany (e-mail: ulrich.hambach@uni-bayreuth.de) *corresponding author
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