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Microtus guildayi

Mammalia - Rodentia - Cricetidae

Taxonomy
Microtus guildayi was named by van der Meulen (1978) [Holotype: fig. 7A]. Its type specimen is CM 20333, a mandible (mandible dext. with m1-m2), and it is not a trace fossil.

It was recombined as Allophaiomys guildayi by Repenning (1983), Pfaff (1990), Repenning (1992) and Morgan and White (1995).

Synonyms
Synonymy list
YearName and author
1871Arvicola sigmodus Cope
1871Arvicola speothen Cope
1871Arvicola tetradelta Cope
1871Microtus involutus Cope
1896Microtus speothen Cope
1899Microtus speothen Cope
1902Microtus involutus Hay p. 728
1902Microtus speothen Hay p. 729
1955Microtus speothen Hibbard
1978Microtus guildayi van der Meulen
1980Microtus guildayi Kurten and Anderson p. 261
1983Allophaiomys guildayi Repenning
1987Microtus guildayi Martin
1990Allophaiomys guildayi Pfaff
1992Allophaiomys guildayi Repenning
1995Microtus guildayi Martin
1995Allophaiomys guildayi Morgan and White

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
RankNameAuthor
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
infraorderMyodontaSchaub 1958
superfamilyMuroideaIlliger 1811
familyCricetidaeFischer von Waldheim 1817
subfamilyArvicolinae
tribeArvicoliniGiebel 1855
genusMicrotusSchrank 1798
speciesguildayi

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
A. J. van der Meulen 1978Medium sized Microtus species, with lengtehned and somewhat complicated anteroconid complex; the mea of A/L equals or is greater than 44.5, but is less than 46.3; the mean of B/W equals or is greater than 23.0, but is less than 28.0, the mean of C/W equals or is greater than 20.0; the mean of W'/W equals or is greater than 76.0 but is less than 85.0. Microtus guildayi differs from Microtus sp. from Wathena and Kentuck in having higher mean A/L and W'/W values and lower mean B/W and C/W values; Microtus guildayi differs from Microtus llanensis Hibbard in having lower mean A/L and W'/W values and higher mean B/W value; it differs from Microtus nutiensis Chaline and Microtus burgondiae Chaline in having higher mean B/W value.