Somoza-Valdeolmillos E., Gómez-Moliner B.J., Caro A., Chueca L.J., Martínez-Ortí A., Madeira M.J.

The genus Chondrina is distributed through the West of Eurasian continent. Currently, it includes 46 species of land snails, 33 of them living in the Iberian Peninsula being its main center of speciation.  The classification of the taxa included within C. farinesii complex is still controversial and many taxa are placed within this complex by having an extreme reduction of teeth in the shell aperture, a character that has been shown to be subjected to convergent evolution. Gittenberger (1973) considered three subspecies: C. farinesii arigonis, C. f. farinesii and C. f. sexplicata. Later on, Kokshoorn et al. (2010), based on DNA sequences of the COI gene fragment separated C. aguilari, C. arigonis, C. dertosensis and C. massotiana (including C. m. massotiana and C. m. sexplicata), previously considered within C. farinesii, with full species status. With the aim to progress in the resolution of the taxonomy and phylogenetic relationships of this complex of species we have analysed two mtDNA gene fragments (COI and 16S rRNA), another two nDNA gene fragments (ITS1-5.8S and 5.8S-ITS2-28S) and three species delimitation analyses (ABGD, BPP and Stacey). This study included all the taxa mentioned above. Besides, we included some other taxa closely related to them or with reduced teeth in the shell aperture, including C. ascendens and specimens belonging to Chondrina spec. 1, C. spec. 5 and C. spec. 6 following the nomenclature of Kokshoorn and Gittenberger (2010). The new results allowed to reconstruct the phylogenetic relationships of all these taxa and to update their taxonomy. One new undescribed species is here considered.

Acknowledgements: Somoza-Valdeolmillos E. was supported by a PhD fellowship awarded in 2015 by the University of the Basque Country (UPV/EHU).