Alcock, A. (1900). Material for a carcinological Fauna of India. No. 6: the Brachyura Catometopa, or Grapsoidea. <em>Journal on the Asiatic Society of Bengal.</em> 69(2): 279-456., available online athttps://biodiversitylibrary.org/page/35612227[details]
DecaNet eds. (2024). DecaNet. Ptychognathus onyx Alcock, 1900. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=207549 on 2024-09-23
Marine Species Traits editorial board (2024). Marine Species Traits. Ptychognathus onyx Alcock, 1900. Accessed at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=207549 on 2024-09-23
original descriptionAlcock, A. (1900). Material for a carcinological Fauna of India. No. 6: the Brachyura Catometopa, or Grapsoidea. <em>Journal on the Asiatic Society of Bengal.</em> 69(2): 279-456., available online athttps://biodiversitylibrary.org/page/35612227[details]
basis of recordHartnoll, R.G. (1975). The Grapsidae and Ocypodidae (Decapoda: Brachyura) of Tanzania. J. Zool. London 177, 305-328[details]
Present Inaccurate Introduced: alien Containing type locality