NATURAL HISTORY · CATALOGUE RECORD

Northern Pygmy Mouse

Baiomys taylori (Thomas, 1887)

Source-backed taxonomic record

Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.

Open encyclopedia reference

The northern pygmy mouse (Baiomys taylori) is a species of rodent in the family Cricetidae. It is known as ratón-pigmeo norteño in the Spanish-speaking areas of its range. It is found in Mexico and the United States. It is the smallest rodent in North America.

Wikipedia contributors, Northern pygmy mouse; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T08:42:17.787311+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name: Baiomys taylori (Thomas, 1887)
Name authority: (Thomas, 1887)
Common name: Northern Pygmy Mouse
Rank: species
Accepted status: accepted
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Genus: Baiomys
Extinction status: Recorded extant

Classification family tree

Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.

domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
kingdomAnimalia
phylumChordata
subphylumVertebrata
infraphylumGnathostomata
parvphylumOsteichthyes
megaclassTetrapoda
classMammalia Linnaeus, 1758
subclassTheria Parker & Haswell, 1897
infraclassEutheria Gill, 1872
orderRodentia Bowdich, 1821
suborderMyomorpha Brandt, 1855
superfamilyMuroidea Illiger, 1811
familyCricetidae Fischer, 1817
subfamilyNeotominae Merriam, 1894
genusBaiomys True, 1894
speciesBaiomys taylori (Thomas, 1887)

Close classified relatives

These entries share the source’s genus, Baiomys. They are not necessarily the closest relatives established by molecular evidence.

Species	Classification	Source status
Southern Pygmy MouseBaiomys musculus (Merriam, 1892)	CricetidaeChordata	Accepted speciesRecorded extant

Browse 593 records assigned to Cricetidae.

Names & synonyms

Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.

Recorded name	Source status
Peromyscus allex Osgood, 1904 Osgood, 1904	synonym
Peromyscus paulus J. A. Allen, 1903 J. A. Allen, 1903	synonym
Peromyscus taylori analogus Osgood, 1909 Osgood, 1909	synonym
Baiomys taylori fuliginatus Packard, 1960 Packard, 1960	synonym
Baiomys taylori canutus Packard, 1960 Packard, 1960	synonym
Peromyscus taylori subater Bailey, 1905 Bailey, 1905	synonym
Baiomys taylori ater Blossom & Burt, 1942 Blossom & Burt, 1942	synonym

Documented distribution

Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.

Middle America

North America

Source literature & publication evidence

References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.

https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=180368 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references

Origins, evidence & remaining research

Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.

Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record.

Dataset citation & attribution

This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11

Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.

Stable key: col:5WB4Z. Classification follows source parent identifiers. English common names may vary by region.