NATURAL HISTORY · CATALOGUE RECORD
Isla Angel Rattlesnake
Crotalus angelensis Klauber, 1963
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.
An Angel Island rattlesnake at Rattlesnake Ranch.
RatioTile · 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
Crotalus angelensis, or the Ángel de la Guarda Island speckled rattlesnake, is a pit viper species endemic to Isla Ángel de la Guarda in the Gulf of California, Mexico. Like all other pitvipers, it is venomous. It is sometimes treated as a subspecies of Crotalus mitchellii.
Wikipedia contributors, Crotalus angelensis; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T10:07:56.134588+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Crotalus angelensis Klauber, 1963
- Name authority
- Klauber, 1963
- Common name
- Isla Angel Rattlesnake
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Squamata
- Family
- Viperidae
- Genus
- Crotalus
- 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
- suborderSerpentes Linnaeus, 1758
- infraorderAlethinophidia Nopcsa, 1923
- familyViperidae
- subfamilyCrotalinae
- genusCrotalus
- speciesCrotalus angelensis Klauber, 1963
Close classified relatives
These entries share the source’s genus, Crotalus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Southwestern Speckled RattlesnakeCrotalus pyrrhus (Cope, 1866) | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Queretaran Dusky RattlesnakeCrotalus aquilus Klauber, 1952 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Mexican Dusky RattlesnakeCrotalus armstrongi Campbell, 1979 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Crotalus lorenzoensis Radcliff & Maslin, 1975 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Aruba Island RattlesnakeCrotalus unicolor Lidth de Jeude, 1887 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Uracoan RattlesnakeCrotalus vegrandis Klauber, 1941 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Horsehead Island speckled rattlesnakeCrotalus polisi Meik, Schaack, Flores-Villela & Streicher, 2018 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Guerreran Pygmy RattlesnakeCrotalus exiguus Campbell & Armstrong, 1979 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Catalina Island RattlesnakeCrotalus catalinensis Cliff, 1954 | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Arizona Black RattlesnakeCrotalus cerberus (Coues, 1875) | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Crotalus enyo (Cope, 1861) | ViperidaeChordata | Accepted speciesExtinction status not supplied |
| Crotalus lepidus (Kennicott, 1861) | ViperidaeChordata | Accepted speciesExtinction status not supplied |
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=Crotalus&species=angelensis 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:6BJ67. Classification follows source parent identifiers. English common names may vary by region.