Cochlostoma Jan, 1830 revised: an overview of the subgenus Turritus Westerlund, 1883 and its species (Caenogastropoda, Cochlostomatidae) Author Zallot, Enrico 365E17AD-6938-4364-A526-F1BDA2663E10 Per Ligont 1, 33070 Budoia, Italy. ezallot@gmail.com Author Kamchev, Panche 9FA2BE01-3355-4340-B57C-9E2841D5E4C2 Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, the Netherlands. panekamchev@gmail.com Author Schilthuizen, Menno 683D0AB7-CDD8-4FAA-94B6-436F3BFB8873 Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, the Netherlands. & Taxon Expeditions, Rembrandtstraat 20, 2311 VW Leiden, the Netherlands. menno.schilthuizen@naturalis.nl Author Fehér, Zoltán E801EC76-8B1E-450B-993E-BBBE57C00EA9 WWF Hungary, Álmos vezér útja 69 / A, 1141 Budapest, Hungary. feher.zoltan.nhmus@gmail.com Author Mattia, Willy De C74A049D-9D7B-4A1F-878B-5BDFD104219F Central Research Laboratories, Burgring 7, 1010, Vienna, Austria; Department of Evolutionary Biology, University of Vienna, Djerassiplatz 1, 1030, Vienna, Austria. wdemattia@gmail.com Author Gittenberger, Edmund D786C279-FC92-4D08-AF16-F79A9705E0AE Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, the Netherlands. egittenberger@yahoo.com text European Journal of Taxonomy 2024 2024-03-21 927 1 163 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2475/11013 journal article 10.5852/ejt.2024.927.2475 2118-9773 10853688 B6E43365-FACA-49BA-8CCD-77E4BF8F0016 Cochlostoma ( T. ) gracile gracillimum ( Wagner, 1901 ) Figs 15H , 21 (green dots), 23 Pomatias gracilis var. gracillima Wagner, 1901: 64 . Syntypes BOSNIA AND HERZEGOVINA • 1 ♀ , 1 ♂ ; “ Bočac zwisch. Jajce und Banjaluka ”; 1 Aug. 1899 ; “ Auritus gracile gracillimus , Wagner det.”; Sturany leg.; NHMW3230 • 4 ♀♀ ; “ Bočac zw. Jajce und Banjaluka ”; as Pomatias gracilis var. gracillima ; MIZPASW6866 . Other specimens BOSNIA AND HERZEGOVINA • 2- Vrbac valley ; 44.6833° N , 17.1783° E ; 2013; J. Grego leg.; coll. Grego (Horna Micina Slovakia) . Type locality BOSNIA AND HERZEGOVINA • 1- Republika Srpska, Bočac. Description SHELL . Closely spaced riblets on last part of protoconch. Teleoconch spotless, with strong to moderately strong and rounded ribs. Rather weak lip with columellar lobe quite abruptly bent inwardly to cover umbilicus. MEASUREMENTS . 2 ♀♀ : whorls= 7.8–8.6, H = 6.8–7.5 mm , H/W= 2.81–2.94, roundness =0.2–0.21, ribs incl.= 58–61°, apert. incl.= 17–20°, ribs/mm 1 st wh.= 10–10, ribs/mm 4 th wh.= 10–10. FEMALE GENITAL ORGANS . As in C. ( T. ) stussineri . Fig. 23. Types of Cochlostoma ( T. ) gracile gracillimum ( Wagner, 1901 ) A . ♀ (NHMW32301/1). B . ♂ (NHMW32301/2). On the right a specimen from 2-Vrbac Valley, BeH. Remarks We provisionally keep it as a subspecies of “ gracile ” because of insufficient data to revise its status in more detail. The name “ gracillimum ” is a declination in Latin of the superlative of “ gracilis ” and can be translated as ‘really slender’ but the analysed specimens do have a H/W ratio similar to that of the nominotype. In Wagner’s collection, there are specimens from the type locality and from Livno, another locality in Bosnia , situated more than 100 km south (MIZPAS-W6867), which might belong to the same taxon. The p-distance of this taxon with the nominotyical sample of the species is 1.4%.