Murchisonia Engel, 1896 Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Animalia phylum Mollusca class Cephalopoda family Graphoceratidae genus Ludwigia Name Homonyms Murchisonia Brittan Murchisonia d'Archiac & Verneuil, 1841 Murchisonia Costa, 1861 Murchisonia Engel, 1896