Dilian Georgiev is an Associate Professor in the department of Ecology and Environmental Protection at The Paisii Hilendarski University of Plovdiv. In this episode, he tells Zoe about his recent paper in volume 44 of Historia naturalis bulgarica, in which he and his coauthors describe a new species of spring-snail from the Belasitsa Mountains in South-West Bulgaria. He describes spring-snail evolution, tells us some stories about caving, and shares some wise words about the importance of conservation. The title of the paper is "Bythinella fabiae n. sp., a new spring-snail species (Gastropoda: Rissooidea) from the Belasitsa Mountains, South-West Bulgaria." The paper can be found here: https://doi.org/10.48027/hnb.44.041 Be sure to follow New Species on Twitter (@PodcastSpecies), like the podcast page on Facebook (https://www.facebook.com/NewSpeciesPodcast), and music in this podcast is "No More (Instrumental)," by HaTom (https://fanlink.to/HaTom). If you have questions or feedback about this podcast, please e-mail us at [email protected] If you would like to support this podcast: https://www.patreon.com/NewSpeciesPodcast