Pachyrhachis problematicus Haas, 1979 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata family Dolichosauridae genus Pachyrhachis species Pachyrhachis problematicus Name Synonyms Estesius colberti (Haas, 1980) Ophiomorphus colberti (Haas, 1980) Homonyms Pachyrhachis problematicus Haas, 1979