Ibexaspis brevis (Young, 1973) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Trilobita order Phacopida family Pliomeridae genus Ibexaspis species Ibexaspis brevis Name Synonyms Protopliomerops brevis (Young, 1973) Protopliomerops quattuor brevis (Young, 1973) Homonyms Ibexaspis brevis (Young, 1973)