Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean Author In, First Published text Zootaxa 2022 2022-06-02 5146 1 129 journal article 10.11646/zootaxa.5146.1.1 1175­5334 52C3E5E3-80B6-49DB-BC9C-194560D491F7 Genus Acanthonyx Latreille, 1828 Type species. Maia lunulata Risso, 1816 [ Type locality: Nice , France ] . Remarks. Acanthonyx lunulatus ( Risso, 1816 ) and A. petiverii H. Milne Edwards, 1834 , are wide-ranging and morphologically variable and this may account for them having far more subjective junior synonyms than the other species in the genus. Tavares et al. (2017) recently clarified the status of A. brevifrons A. Milne-Edwards, 1869 , recognized as a valid species based on molecular and morphological characters. Acanthonyx petiverii , along with all its junior synonym species, badly needs a taxonomic revision based on material from the various parts of its geographical range.