Cryptic diversity in a widespread land snail: revision of the genus Xanthomelon Martens, 1860 from the Australian Monsoon Tropics (Pulmonata, Camaenidae)

The camaenid genus Xanthomelon is widely distributed throughout the Australian Monsoon Tropics and eastern Queensland, with nine species currently being recognised in Australia based exclusively on shell features. Due to the combination of poor taxonomic descriptions and considerable variation in shell characters, considerable confusion surrounds the number of species in the Northern Territory ( NT ), their key characteristics and distributions....