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Identifier

000376315

Title

Μοριακή Φυλογένεση και Φυλογεωγραφία των δύο "στενά συγγενικών" γενών Helicigona & Campylaea (Γαστερόποδα: Πνευμονοφόρα) στην Ελλάδα

Alternative Title

Molecular Phylogeny and Phylogeography of the two "close related" genera Helicigona & Campylaea (Gastropoda: Pulmonata) in Greece

Author

Ψώνης, Νικόλαος Ιππ.

Thesis advisor

Πουλακάκης, Νίκος

Reviewer

Τσιγγενόπουλος, Κώστας
Μυλωνάς, Μωυσής

Abstract

Land snails of the genera Helicigona and Campylaea are highly diversified in Greece with also high levels of endemism. The genus Helicigona consists of 17 species, 14 of them are endemic in Greece and three can be found also in Albania. Campylaea comprises eight species, of which four are Greek endemic. The species exhibit great morphological and ecological plasticity and inhabit many different habitats from calcareous rocks and maquis to conifer forests and alpine grasslands. This is the first phylogenetic study of these genera, based on partial mitochondrial DNA sequences of the 16S rRNA and COI genes. A total of 57 specimens, belonging to 14 species from 56 localities in Greece, were included. The phylogenetic tree reveals the existence of three distinct major phylogroups. The first consists of all the species of genus Helicigona except these of H. vikosensis and H. hymetti, the second comprises the species C. trizona and the third contains all the species belonging to genus Campylaea except the one of C. trizona, and furthermore, contains the species H. vikosensis and H. hymetti. Moreover, the two genera appear to belong to the same family, but to be very distant genetically and not so much “close related”. Also, the genus Helicigona is paraphyletic, while the genus Campylaea is polyphyletic. In general, it is necessary to reevaluate the taxonomic state of these species and genera. Also, it is obvious the need of new, more diagnostic, morphological, taxonomical characters, in order to be possible the advisable taxonomy, both in species and genus level. Finally, by using a molecular clock, it appears that the three major phylogenetic clades, which probably corresponds to three different genera, were separated in Oligocene and started to differate to different species in middle and late Miocene (from 13.6 – 8.2 mya). Key

Language

Greek

Subject

16S RRNA

COI

Land snails

Molecular clock

Phylogenetic analyses

Μοριακό ρολόι

Φυλογενετικές αναλύσεις

Χερσαία σαλιγράρια

Issue date