Placenticeras guadaloupaeforme (Sommermeier, 1910) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Cephalopoda family Knemiceratidae genus Parengonoceras species Parengonoceras guadaloupaeforme Name Homonyms Placenticeras guadaloupaeforme (Sommermeier, 1910)