NATURAL HISTORY · CATALOGUE RECORD
Pacific blue-bellied lizard
Sceloporus occidentalis Baird & Girard, 1852
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.
Adult Western Fence Lizard (Sceloporus occidentalis), Sacramento County, California.
Connor Long · CC BY-SA 4.0 · Image sourceProvider-generated thumbnail requested at 800 pixels; no local editing Local WebP display rendition; resized without cropping.
Open encyclopedia reference
The western fence lizard (Sceloporus occidentalis) is a species of lizard native to Arizona, New Mexico, and California, as well as Idaho, Nevada, Oregon, Utah, Washington, and Northern Mexico. The species is widely found in its native range and is considered common, often being seen in yards, or as the name implies, on fences. As the ventral abdomen of an adult is characteristically blue, it is also known as the blue-belly. Two western fence lizards have been reported with duplicated or forked tails, presumably following an autotomy.
Wikipedia contributors, Western fence lizard; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T11:58:29.618243+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Sceloporus occidentalis Baird & Girard, 1852
- Name authority
- Baird & Girard, 1852
- Common name
- Pacific blue-bellied lizard
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Squamata
- Family
- Phrynosomatidae
- Genus
- Sceloporus
- 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.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classReptilia Laurenti, 1768
- orderSquamata Oppel, 1811
- suborderIguania
- familyPhrynosomatidae
- genusSceloporus
- speciesSceloporus occidentalis Baird & Girard, 1852
Close classified relatives
These entries share the source’s genus, Sceloporus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Black-bellied Bunchgrass LizardSceloporus aeneus Wiegmann, 1828 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| White-bellied Rough LizardSceloporus albiventris Smith, 1939 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Anahuacan Bunchgrass LizardSceloporus anahuacus Lara-Gongora, 1983 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Santa Cruz Island SatorSceloporus angustus (Dickerson, 1919) | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Southern Occidental Bunchgrass LizardSceloporus aurantius Grummer & Bryson, 2014 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Eastern Cleft Spiny LizardSceloporus aureolus Smith, 1942 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Island Fence LizardSceloporus becki Van Denburgh, 1905 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Trans Volcanic Bunchgrass LizardSceloporus bicanthalis Smith, 1937 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Buller's Spiny LizardSceloporus bulleri Boulenger, 1895 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Blue Ornate Spiny LizardSceloporus caeruleus Smith, 1936 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Shy Spiny LizardSceloporus cautus Smith, 1938 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
| Yellow-spotted Spiny LizardSceloporus chrysostictus Cope, 1866 | PhrynosomatidaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Sceloporus biseriatus nigro-ventris Bocourt, 1874 Bocourt, 1874 | synonym |
| Sceloporus smaragdinus Cope ex Yarrow, 1875 Cope ex Yarrow, 1875 | ambiguous synonym |
| Sceloporus longipes Baird, 1859 Baird, 1859 | synonym |
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.
- https://reptile-database.reptarium.cz/species?genus=Sceloporus&species=occidentalis 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:4V5B2. Classification follows source parent identifiers. English common names may vary by region.