Fig. 4. Intraspecific variation of the shell shape and colour of Mercuria similis (Draparnaud, 1805). A. Salaboreja Spring, Casa de Ves, Albacete, Spain. B. Salado Stream, Casa de Ves, Albacete, Spain. C. Galayo´s Pond, Fuentalbilla, Albacete, Spain. D. Stream in Barranco del Agua Salada, Gelsa, Zaragoza, Spain (pigmented animal). E. Stream in Barranco del Agua Salada, Gelsa, Zaragoza, Spain (unpigmented animal). F. Saltwater gully in Aguinaliu, Huesca, Spain. G. Stream in Peralta de la Sal, Huesca, Spain. H. Sosa River at Peralta de la Sal, Huesca, Spain. I. Fonte Dame, Salses-le- Château, Aude, France. J. Font d´Estramar, Salses-le-Château, Aude, France. K. Pond at La Palme, Aude, France. L. Estany de la Ricarda, El Prat de Llobregat, Barcelona, Spain. M. Ullals de Baltasar, Amposta, Tarragona, Spain. N. Arc River near Les Cabanes, Bouches-du-Rhône, France. O. La Fouxde-Draguignan, France. P–Q. Arc River near Les Cabanes, Bouches-du-Rhône, France. P. Operculum, inner side. Q. Operculum, outer side.

Published as part of Miller, Jonathan P., Delicado, Diana, García-Guerrero, Fernando, Khalloufi, Noureddine & Ramos, Marian A., 2023, Morphology and taxonomic assessment of eight genetic clades of Mercuria Boeters, 1971 (Caenogastropoda, Hydrobiidae), with the description of five new species, pp. 1-63 in European Journal of Taxonomy 866 (1) on page 11, DOI: 10.5852/ejt.2023.866.2107, http://zenodo.org/record/7867353