Taxonomic status of the genera Amphipholizona H. L. Clark, 1915 (Ophiuroidea, Ophiolepididae) and Amphigyptis Nielsen, 1932 (Hemieuryalidae): systematic placement and synonymy Gondim, Anne Isabelley Christoffersen, Martin Lindsey Dias, Thelma Lúcia Pereira Solís-Marín, Francisco Alonso Zootaxa 2016 4097 3 381 395 H.L. Clark, 1915 H.L. Clark 1915 [537,956,764,790] Ophiuroidea Ophiolepididae Amphipholizona Animalia Ophiurida 3 384 Echinodermata genus    1. Arms long ( 6xdd) and cylindrical. Ventral arm plate pentagonal and flat. Tentacle scale restricted to the first five arm segments............................................................................................  A. delicata  - Arms short (2.5x dd) and compressed dorso-ventrally. Ventral arm plate triangular and tumid. Tentacle scale lacking..........................................................................................  A. perplexa new comb.