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Abstract
Two new species of valvatoid hydrobiids are reported from southern and eastern Spain that showed notable similarities with Horatia Bourguignat, Citation1887 species. However, a conchological redescription of Horatia klecakiana Bourguignat, Citation1887, the type species of this Balkan genus, and the study of new characters for the Iberian species suggest differences between the Balkan and the Iberian groups of species. These differences and the large geographical separation between the Balkan and the Iberian populations for species with poor dispersal capacity lead us to introduce a new generic taxon, Iberhoratia Arconada and Ramos (this paper), to include the two new species. In the Iberian Peninsula, another two species have been described in Horatia, H. (?) sturmi (Rosenhauer, 1856) and H. gatoa Boeters, Citation1980. The first was recently moved to a new genus, Boetersiella Arconada and Ramos, Citation2001, while the second is here assigned to Iberhoratia. The introduction of a new genus for the Iberian Peninsula is another indication of the richness and endemic diversity of the Hydrobiidae in this region.
Acknowledgements
Our thanks to Dr. Gittenberger, curator of the NNM, for the loan of the holotype of H. gatoa and to Anita Eschner, curator of the Naturhistorisches Museum of Vienna, for the loan of topotypes of H. klecakiana. J. Bedoya (†) and Laura Tormo at the MNCN made SEM and ESEM photomicrographs, respectively. Drawings were re‐done by I. Díaz Cortaberría. Dr. M. A. Alonso Zarazaga provided advice on nomenclature and Dr. A. Machordom on molecular data analysis. Sarah Young revised the English text. This work was funded by the “Fauna Ibérica” Project (DGES PB95‐0235). Beatriz Arconada was supported by a predoctoral fellowship from the Spanish Ministerio de Educación y Ciencia. Diana Delicado contributed as a part of her student internship work at MNCN.