Organisms

Crotalus

A genus of snakes of the subfamily Crotalinae, having a hollowed out pit in the maxillary bone between the eye and nostril. Most well recognized species are found in the Southwestern United States and northern Mexico. Several species are found as far north as Canada and as far south as Brazil. They are named for the jointed rattle (Greek krotalon) at the tip of their tail.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A genus of snakes of the subfamily Crotalinae, having a hollowed out pit in the maxillary bone between the eye and nostril. Most well recognized species are found in the Southwestern United States and northern Mexico. Several species are found as far north as Canada and as far south as Brazil. They are named for the jointed rattle (Greek krotalon) at the tip of their tail.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

2 entry terms
  • Rattlesnake
  • Rattlesnakes

MeSH Record

Aspects Covered

17 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood, cerebrospinal fluid, classification, embryology, genetics, growth & development, immunology, injuries, metabolism, microbiology, parasitology, physiology, surgery, urine, virology.

MeSH Record

History Note

94

MeSH Record

Previous Indexing

  • Snakes (1966-1993)

MeSH Hierarchy

Tree Numbers

  1. B01w.050w.050.286.875w.875w.240w.500w
  2. B01w.050w.150w.900w.833w.672w.125w.937w.240w.500w
  3. B01w.050w.150w.900w.833w.672w.562w.875w.240w.500w

AMA Style

References

  1. National Library of Medicine. Crotalus. Medical Subject Headings (MeSH). 2026. Unique ID D017839. http://id.nlm.nih.gov/mesh/2026/D017839
  2. Crotalus. In: Wikipedia. https://en.wikipedia.org/wiki/Crotalus
  3. Crotalus. In: Wikidata. https://www.wikidata.org/wiki/Q463637