A new genus and new species of valvatiform Hydrobiidae for the North-East Iberian Peninsula Author López-Soriano, Joaquín Associació Catalana de Malacologia, Museu Blau, Plaça Leonardo da Vinci 4 - 5,08019 Barcelona, Spain. qlopezs@yahoo.com Author Quiñonero-Salgado, Sergio Associació Catalana de Malacologia, Museu Blau, Plaça Leonardo da Vinci 4 - 5,08019 Barcelona, Spain. Author Suárez, Álvaro Alonso C / Infiesto 7 6 ºJ, 33207 Gijón, Asturias, Spain. Author Rolán, Emilio Museo de Historia Natural de la Universidad de Santiago, Campus Norte, Parque Vista Alegre, 15782. Santiago de Compostela, Spain. Author Glöer, Peter Schulstrasse 3, D- 25491, Hetlingen, Germany. text Nemus 2022 2022-12-31 12 160 167 journal article 299910 10.5281/zenodo.12170404 a7c29dc0-1055-41f0-8fce-1637cb537674 2386-3803 12170404 A20C8CBA-0122-4892-858A-8D91DF11F2E4 Vilertia galeata sp. nov. Fig. 1-3 Type material: Holotype in MNHN Paris, #MNHN-IM-2000-38095 . Paratypes : 2 shells in MNHN Paris, #MNHN-IM-2000-38096, 2 shells in PG coll., 10 shells in SQS coll . Type locality: Deu d’en Roure (= Deu d’en Costei ), Esponellà ( Pla de l’Estany , Girona province ) located in the Fluvià River basin ( Fig. 4 & 5 ) Coordinates : 31TDG 82054700. 115 m a.s.l. Other localities: Font de Beu i Tapa, Vilert (Pla de l’Estany, Girona province), also in the Fluvià River basin. 31TDG 85341691. 90 m a.s.l. Description: Small shell, with valvatiform shape, 0.51 - 0.74 mm in height and 0.96 -1.13 mm diameter, with 3 whorls, deep sutures, and translucid coloration in freshly-collected specimens ( Fig. 2 , 3 , 6 ). Protoconch microsculpture is formed by irregularly arranged microdepressions ( Fig. 1 C-D). Teleoconch showing growing lines. Deep and wide umbilicus, ovoid aperture, about 0.60 -0.80 mm high and 0.51 -0.66 mm wide, slightly oblique, and having a sharp peristome, slightly reflected towards the columella, and strongly towards the outer lip. Last whorl represents 90 % of total height. Corneum operculum, with orange to yellow coloration, convex in the inner side (see Fig. 1E , 3D ). Animal: The animal is colorless, and the eyes are missing. The penis is broad and rounded at the tip with a penial lobe of the same length ( Fig. 3B ). Intestine with one loop ( Fig. 3C ). Female sex tract with spherical bursa, receptaculum could not be found. FIGURE 3. Vilertia galeata gen.nov.sp.nov. A: shell (paratype); B: male copulatory organ; C: intestinal loop; D-E: operculum (inner side).Scale:1 mm Vilertia galeata gen.nov.sp.nov. A: conquilla (paratip); B: òrgan copulador del mascle; C: gir intestinal; D-E: opercle (costat intern). Escala:1mm Etymology: The specific name refers to the helmetshape of the shell, resembling the M15 Adrian French model of World War I. Dimensions: The holotype is 1.05 mm in diameter and 0.68 mm in height. Paratypes range from 0.96 - 1.27 mm in diameter and 0.51 - 0.74 mm in height (see Table I). Habitat: Stygobiotic, all the shells were collected from sediments at the opening of the springs. Distribution: Only known from two different springs, very close to each other, in the margins of the Fluvià River. Differentiating characters: Vilertia gen. nov. differs from all valvatoid genera by the reflexed peristome. It differs from Rifia Ghamizi 2020 by the missing outgrowth at the operculum; from Fissuria Boeters, 1991 , by the penis, which is papillose but without a penial lobe. In addition, Fissuria has two intestinal loops, while Vilertia gen. nov. has only one.