Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae) de Figueiredo Petean, Flávia ; R. de Carvalho, Marcelo Abstract Publication: PLoS ONE Pub Date: August 2018 DOI: 10.1371/journal.pone.0201913 Bibcode: 2018PLoSO..1301913D