Specimens sequenced in this study. Zospeum troglobalcanicum: NMBE 568052 & 568053 (both from Špilja Jezero); Zospeum simplex sp. nov.: NMBE 568054 (Špilja Dahna), NMBE 568055–568057 (Jama u kamenolomu), NMBE 568059 (Vranjača), NMBE 568060 (Holotype, Jama Dobravljevac), NMBE 568061–568063 (Paratypes, Jama Dobravljevac)