1. Species Oncis amboinae (Plate, 1893) accepted as Platevindex amboinae (Plate, 1893)
2. Species Oncis apoikistes (Tillier, 1983) accepted as Semperoncis montanus (Plate, 1893)
3. Species Oncis coeca Plate, 1893 accepted as Platevindex amboinae (Plate, 1893) (junior synonym)
4. Species Oncis coriacea C. Semper, 1880 accepted as Platevindex coriaceus (C. Semper, 1880) (unaccepted > superseded combination)
5. Species Oncis granifera (C. Semper, 1880) accepted as Wallaconchis graniferum (C. Semper, 1880) accepted as Wallaconchis graniferus (C. Semper, 1880) (unaccepted > superseded combination)
6. Species Oncis granulosa (Lesson, 1826) accepted as Onchidium granulosum Lesson, 1831
7. Species Oncis inspectabilis Plate, 1893 accepted as Platevindex martensi (Plate, 1893) (junior synonym)
8. Species Oncis lata Plate, 1893 accepted as Platevindex latus (Plate, 1893) (original combination)
9. Species Oncis lutea (C. Semper, 1882) accepted as Platevindex luteus (C. Semper, 1882)
10. Species Oncis martensi Plate, 1893 accepted as Platevindex martensi (Plate, 1893) (original combination)
11. Species Oncis montana Plate, 1893 accepted as Semperoncis montanus (Plate, 1893) (original combination)
12. Species Oncis mortoni (Britton, 1984) accepted as Platevindex mortoni Britton, 1984
13. Species Oncis ponsonbyi (Collinge, 1901) accepted as Semperoncis ponsonbyi (Collinge, 1901)
14. Species Oncis schneideri Hoffmann, 1932 accepted as Platevindex schneideri (Hoffmann, 1932) accepted as Platevindex luteus (C. Semper, 1882) (original combination)
15. Species Oncis semperi Plate, 1893 accepted as Platevindex coriaceus coriaceus (C. Semper, 1882) (junior synonym)
16. Species Oncis stuxbergi (Westerlund, 1883) accepted as Onchidium stuxbergi (Westerlund, 1883)
17. Species Oncis cinerea Odhner, 1917 (uncertain > nomen dubium)

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