2816 Author Morgan, David L. Author Allen, Gerald R. Author Pusey, Bradley J. Author Burrows, Damien W. text Zootaxa 2011 2011-04-12 2816 1 64 journal article 1175­5334 Craterocephalus helenae Ivantsoff, Crowley and Allen Drysdale Hardyhead Craterocephalus helenae is endemic to the Drysdale River system in the Kimberley ( Fig. 15 ). The species is widespread throughout this system and is apparently abundant in both the upper and lower sections of the main channel ( Fig. 15 ) ( Allen et al . 2002 ).