Figure 4 from: Yessoufou K, Van Der Bank H, Herbert D, Greenfield R (2013) Revisiting species delimitation within the genus Oxystele using DNA barcoding approach. ZooKeys 365: 337-354. https://doi.org/10.3897/zookeys.365.5356

Figure 4 - Patterns of shell colour within the genus Oxystele. A–C Oxystele variegata from Namibia, 5 km north of Swakopmund, diameter 22.2 mm (NMSA E6038) D–F Oxystele impervia from the Western Cape, Groen Rivier, diameter 22.3 mm (NMSA E7353) G–I Oxystele sp. from theEastern Cape, Tsitsikamma National Park, diameter 16.5 mm (HVDBM058-10, NMSA W7371); the colour pattern of these specimens suggests Oxystele variegata, but these specimens group within the unit of Oxystele impervia J–L Oxystele sp. from the Northern Cape, Noup, diameter 18.0 mm (HVDBM185-10, NMSA W7608); the colour pattern suggests Oxystele impervia, but they group with Oxystele variegata (see Figure 4 and Appendix 2 for the phylogenetic groupings of these specimens and node supports; these groupings contradict their morphological identification).