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Genetic break in Lauria cylindracea (Da Costa 1778)

(Gastropoda: Stylommatophora: Lauriidae)

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The intraspecific variation of different (Da Costa 1778) populations with specimens sampled in Greece, Germany and Ireland was examined based on the polymorphism of the internal transcribed spacer 2 of the nuclear ribosomal DNA. I found a separation of northern and southern populations based on a minisatellite motif (TGGAAGTG) which was displayed twice in southern and three times in northern populations. The boundary can be found within Germany where the disjunctive populations along the Baltic Sea and in Rhineland-Palatinate displayed the northern or southern sequence pattern, respectively. Based on morphological analyses of shell characters it was possible to reveal some significant differences between populations, however, these did not correspond to the differentiation of northern and southern populations found by sequence data.

German
Im Rahmen der vorliegenden Arbeit wurde die intraspezifische Variation unterschiedlicher Populationen von Lauria cylindracea (Da Costa 1778) basierend auf Unterschieden im Bereich des Internal Transcribed Spacers 2 der nuklear ribosomalen DNA untersucht. In die molekularen Untersuchungen wurden Tiere aus Deutschland, Griechenland und Irland einbezogen. Nördliche und südliche Populationen von L. cylindracea können anhand eines Minisatelliten-Motivs (TGGAAGTG) unterschieden werden, dass bei Tieren aus südlichen Populationen zweimal, bei solchen aus nördlichen Populationen dreimal hintereinander auftritt. Die Grenze dieses Musters verläuft durch Deutschland, wo die nördlichen Populationen entlang der Ostseeküste das dreifache und die südlichen Populationen in Rheinland-Pfalz das zweifache Motiv aufweisen.

Morphologische Untersuchungen erbrachten zwar stellenweise signifikante Größenunterschiede zwischen einzelnen Populationen, ließen jedoch keine Rückschlüsse auf die Zugehörigkeit zu den molekular unterschiedenen Populationen zu.
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Keywords: GENETIC BREAK; LAURIA; MINISATELLITE MOTIF; MORPHOLOGY; PHYLOGEOGRAPHY; PUPILLOIDEA

Document Type: Research Article

Publication date: 01 June 2007

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  • Archiv für Molluskenkunde is an international, peer-reviewed journal on all aspects of molluscan biodiversity. It preferably publishes original research papers of high quality on systematics, taxonomy, phylogeny and morphology of all groups of molluscs, both recent and fossil from the Cenozoic. Contributions of broad international interest on other aspects of malacology such as ecology and biogeography are welcome as well. Papers on physiology, parasitology, regional faunistics or those on non-Cenozoic fossils or pure biostratigraphy should be submitted elsewhere. Manuscripts shall be in English but may include an expanded abstract in a foreign language.

    Archiv für Molluskenkunde was founded in 1868 as "Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft". It has been published continuously since its foundation, making it the oldest malacological journal. It is edited by the curators of the section of Mollusca at the Senckenberg research institute.

    Up to and including Vol. 138/2 papers were published under the ISSN 0003-9284.
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