The width of the shell is 0.9-1.1mm. The height of the shell is 1.6-2.2mm. It is wider than the shell of Carychium tridentatum which it closely resembles. As in C. tridentatum shell is dull white and cylindrical and the mouth is oval with two denticles and a thickened lip. However if the last whorl above the aperture is opened this shows the plica parietalis (a spiral ridge on the parietal region projecting into the interior of the shell) descending in a simple way downwards.
drawing of shells of Carychium minimum
Distribution
The distribution of Carychium minimum is Euro-Asiatic.
↑Müller O. F. (1774). Vermivm terrestrium et fluviatilium, seu animalium infusoriorum, helminthicorum, et testaceorum, non marinorum, succincta historia. Volumen alterum. - pp. I-XXVI [= 1-36], 1-214, [1-10]. Havniæ & Lipsiæ. (Heineck & Faber).
↑Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Carychium minimum O. F. Müller, 1774". MolluscaBase. World Register of Marine Species. Retrieved 11 April 2026.
↑Welter-Schultes F. W. (2012). European non-marine molluscs, a guide for species identification. Bestimmungsbuch für europäische Land- und Süsswassermollusken. Planet Poster Editions, Göttingen. ISBN978-3-933922-75-5.
123Horsák M., Juřičková L. & Picka J. (2013). Měkkýši České a Slovenské republiky. Molluscs of the Czech and Slovak Republics. Kabourek, Zlín, 264 pp., page 30, page 63.
↑Horsák M. & Chytrý M. (2014). "Unimodal Latitudinal Pattern of Land-Snail Species Richness across Northern Eurasian Lowlands". PLoS ONE9(8): e104035. doi:10.1371/journal.pone.0104035.
↑Forsyth R.G. (2015). "First record of Carychium minimum Müller, 1774 in New Brunswick, Canada (Mollusca: Gastropoda: Ellobioidea)". Check List11(1): 1-4. doi:10.15560/11.1.1511.