(Californian) Desert Tortoise

Open encyclopedia reference

The desert tortoise (Gopherus agassizii) is a species of tortoise in the family Testudinidae. The species is native to the Mojave and Sonoran Deserts of the southwestern United States and northwestern Mexico, and to the Sinaloan thornscrub of northwestern Mexico. G. agassizii is distributed in western Arizona, southeastern California, southern Nevada, and southwestern Utah. The specific name agassizii is in honor of Swiss-American zoologist Jean Louis Rodolphe Agassiz. The desert tortoise is the official state reptile in California and Nevada.

The desert tortoise lives 70 to 80 years on average; it grows slowly and generally has a low reproductive rate. It spends most of its time in burrows, rock shelters, and pallets to regulate body temperature and reduce water loss. It is most active after seasonal rains and is inactive during most of the year. This inactivity helps reduce water loss during hot periods, whereas winter brumation facilitates survival during freezing temperatures and low food availability. Desert tortoises can tolerate water, salt, and energy imbalances on a daily basis, which increases their lifespans.

Wikipedia contributors, Desert tortoise; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T12:06:06.021575+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Gopherus agassizii (Cooper, 1861)

Name authority

(Cooper, 1861)

Common name

(Californian) Desert Tortoise

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Reptilia

Order

Testudines

Family

Testudinidae

Genus

Gopherus

Extinction status

Not supplied by this source

Classification family tree

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

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumOsteichthyes
7. megaclassTetrapoda
8. classReptilia Laurenti, 1768
9. orderTestudines Batsch, 1788
10. suborderCryptodira
11. superfamilyTestudinoidea
12. familyTestudinidae
13. genusGopherus
14. speciesGopherus agassizii (Cooper, 1861)

Close classified relatives

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

Browse 37 records assigned to Testudinidae.

Names & synonyms

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

Documented distribution

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

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.

1. https://reptile-database.reptarium.cz/species?genus=Gopherus&species=agassizii 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. A suitable sourced image remains to be added.

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:3H2LD. Classification follows source parent identifiers. English common names may vary by region.