Abstract
A new species of Kerkia, K. briani Rysiewska & Osikowski, sp. nov. is described from the spring Polički Studenac Vrelo (Crkvina), adjacent to the Trebišnjica River (Bosnia and Herzegovina) collected with Bou-Rouch technique, pumped from an interstitial habitat 50 cm below the bottom of the spring. The shell, female reproductive organs, and the penis are described and illustrated. Mitochondrial cytochrome oxidase subunit I (COI) and nuclear histone H3 partial sequences confirm the distinctness of the new species, and molecularly based phylogenetic relationships of Kerkia are briefly presented.
Highlights
Mud snails Hydrobiidae are very small or minute snails, whose shells are often approximately 1 mm high
Family comprises more than 400 extant genera (Kabat and Hershler 1993), many of which are stygobionts
In September of 2019, in the spring Polički Studenac Vrelo (Crkvina), adjacent to the Trebišnjica River, we found Emmericia expansilabris Bourguignat, 1880, Sadleriana sp., Anagastina vidrovani (Radoman, 1973), and Ancylus recurvus Martens, 1873
Summary
Mud snails Hydrobiidae are very small or minute snails, whose shells are often approximately 1 mm high. They inhabit surface and subterranean freshwater habitats, some can be found in brackish and even marine environments. Sebastian Hofman et al / ZooKeys 973: 17–33 (2020). The Balkans, especially their western region, harbours the world’s most diverse stygobiont malacofauna (e.g., Culver and Sket 2000; Culver 2012). Extensive pumping of the interstitial habitats, applying the Bou and Rouch technique sometimes result in more numerous living specimens
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