Microtus guildayi (van der Meulen, 1978) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Mammalia order Rodentia family Cricetidae genus Microtus species Microtus guildayi Name Synonyms Allophaiomys guildayi (van der Meulen, 1978) Arvicola sigmodus Cope, 1871 Arvicola speothen (Cope, 1871) Arvicola tetradelta Cope, 1871 Microtus involutus Cope, 1871 Microtus speothen (Cope, 1871) Homonyms Microtus guildayi (van der Meulen, 1978)