Holcosus undulatus

{{Short description|Species of lizard}}

{{speciesbox

| image = Ameiva undulata02.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Acosta Chaves, V. |author-link=species:Víctor J. Acosta-Chaves |author2=Batista, A. |author2-link=species:Abel Batista |author3=Chaves, G. |author3-link=species:Gerardo Chaves |author4=Flores-Villela, O. |author4-link=species:Oscar Flores-Villela |author5=Ibáñez, R. |author5-link=species:Roberto Ibáñez |author6=Jaramillo, C. |author6-link=species:César A. Jaramillo |author7=Köhler, G. |author7-link=Gunther Köhler |author8=Solórzano, A. |author8-link=species:Alejandro Solórzano |date=2013 |title=Holcosus undulatus |volume=2013 |page=e.T197436A2483383 |doi=10.2305/IUCN.UK.2013-2.RLTS.T197436A2483383.en |access-date=12 November 2021}}

| genus = Holcosus

| species = undulatus

| authority = (Wiegmann, 1834){{NRDB species|genus=Holcosus|species=undulatus}}

| synonyms = *Cnemidophorus undulatus
{{small|Wiegmann, 1834}}

• Ameiva undulata
  {{small|— Gray, 1845}}
• Cnemidophorus amivoides
  {{small|Cope, 1894}}
• Ameiva undulata
  {{small|— H.M. Smith & Laufe, 1946}}
• Holcosus undulatus
  {{small|Harvey, Ugueto & Gutberlet, 2012}}

| synonyms_ref =

}}

Holcosus undulatus, also known commonly as the barred whiptail, the metallic ameiva, and the rainbow ameiva, is a species of lizard in the family Teiidae. The species occurs in Central America from South Mexico to Costa Rica. There are three recognized subspecies.