1. Subgenus Fossar (Clathrella) Récluz, 1864 accepted as Clathrella Récluz, 1864 accepted as Carinorbis Conrad, 1862 (original rank)
2. Subgenus Fossar (Couthouyia) A. Adams, 1860 accepted as Macromphalus S. V. Wood, 1842 (junior synonym)
   1. Species Fossar (Couthouyia) plicifera A. Adams, 1863 accepted as Macromphalus pliciferus (A. Adams, 1863) (unaccepted > superseded combination)
   2. Species Fossar (Couthouyia) reticulatus A. Adams, 1855 accepted as Fossar reticulatus A. Adams, 1855 accepted as Macromphalus reticulatus (A. Adams, 1855) (unaccepted > superseded combination)
   3. Species Fossar (Couthouyia) striatula A. Adams, 1863 accepted as Macromphalus striatulus (A. Adams, 1863) (unaccepted > superseded combination)
   4. Species Fossar (Couthouyia) styliferinus G. Nevill, 1885 accepted as Couthouyia styliferinus (G. Nevill, 1885) accepted as Macromphalus styliferinus (G. Nevill, 1885) (original combination)
   5. Species Fossar (Couthouyia) subreticulatus G. Nevill, 1885 accepted as Macromphalus subreticulatus (G. Nevill, 1885) (original combination)
3. Species Fossar bicarinatus A. Adams, 1855 accepted as Fossarus bicarinatus A. Adams, 1855 (generic name is an unjustified emendation)
4. Species Fossar cumingii A. Adams, 1855 accepted as Fossarus cumingii A. Adams, 1855 (generic name is unjustified emendation)
5. Species Fossar fenestratus A. Adams, 1863 accepted as Vanikoro japonica Pilsbry, 1895 (invalid: junior homonym of Fossarus fenestratus Deshayes, 1857)
6. Species Fossar japonicus A. Adams, 1861 accepted as Macromphalus tornatilis (A. Gould, 1859)
7. Species Fossar reticulatus A. Adams, 1855 accepted as Macromphalus reticulatus (A. Adams, 1855) (unaccepted > superseded combination)
8. Species Fossar tornatilis A. Gould, 1859 accepted as Macromphalus tornatilis (A. Gould, 1859) (superseded combination)
9. Species Fossar trochlearis A. Adams, 1855 accepted as Fossarus trochlearis A. Adams, 1855 (generic name is an unjustified emendation)
10. Species Fossar variegatus A. Adams, 1855 accepted as Echinolittorina atrata (C. B. Adams, 1852)

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