Palorthoceras kayseri Kröger et al., 2007 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Cephalopoda order Orthocerida family Orthoceratidae genus Palorthoceras species Palorthoceras kayseri Name Homonyms Palorthoceras kayseri Kröger et al., 2007