Acanthonyx is a genus of crabs, in the family Epialtidae. Species so far known include: \n* Acanthonyx consobrinus A. Milne-Edwards, 1862 \n* Acanthonyx dentatus H. Milne-Edwards, 1834 \n* Acanthonyx depressifrons Manning & Holthuis, 1981 \n* Acanthonyx dissimulatus Coelho, 1993 \n* Acanthonyx elongatus Miers, 1877 \n* Acanthonyx euryseroche Griffin & Tranter, 1986 \n* Acanthonyx formosa Wu, Yu & Ng, 1999 \n* Acanthonyx inglei Tirmizi & Kazmi, 1988 \n* Acanthonyx limbatus A. Milne-Edwards, 1862 \n* Acanthonyx lunulatus (Risso, 1816) \n* Acanthonyx minor Manning & Holthuis, 1981 \n* ?Acanthonyx nodulosa (Dana, 1852) \n* Acanthonyx petiverii H. Milne-Edwards, 1834 \n* Acanthonyx quadridentatus Krauss, 1843 \n* Acanthonyx sanctaehelenae Chace, 1966 \n* Acanthonyx scutellatus MacLeay, 1838 \n*