# Tropidurus helenae

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{{Short description|Species of lizard}}
{{Speciesbox
| image = 
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name="iucn status 11 November 2021">{{cite iucn |author1=Colli, G.R. |author1-link=species:Gauarino Rinaldi Colli |author2=Fenker, J. |author2-link=species:Jéssica Fenker |author3=Tedeschi, L. |author3-link=species:Leonardo G. Tedeschi |author4=Bataus, Y.S.L. |author4-link=species:Yeda S. de L. Bataus |author5=Uhlig, V.M. |author5-link=species:Viktor Uhlig |author6=Lima, A. |author7=Nogueira, C. de C. |author7-link=species:Cristiano de Campos Nogueira |author8=Borges-Nojosa, D.M. |author8-link=species:Diva Maria Borges-Nojosa |author9=Costa, G.C. |author9-link=species:Gabriel Correira Costa |author10=de Moura, G.J.B. |author10-link=species:Geraldo Jorge Barbosa de Moura |author11=Winck, G. |author11-link=species:Gisele R. Winck |author12=Silva, J.R.S. |author13=Viñas, L.V. |author13-link=species:Laura Verrastro Viñas |author14=Ribeiro Júnior, M.A. |author14-link=species:Marco Antônio Ribeiro-Júnior |author15=Hoogmoed, M.S. |author15-link=species:Marinus Steven Hoogmoed |author16=Tinôco, M.S.T. |author16-link=species:Moacir Santos Tinôco |author17=Almeida-Santos, P. |author17-link=species:Patrícia Almeida dos Santos |author18=Valadão, R. |author18-link=species:Rafael Martins Valadão |author19=de Oliveira, R.B. |author20=Avila-Pires, T.C.S. |author20-link=species:Teresa Cristina Sauer de Ávila-Pires |author21=Ferreira, V.L. |author22=de Menezes, V.A. |author22-link=species:Vanderlaine Amaral de Menezes |date=2021 |title=''Tropidurus helenae'' |volume=2021|article-number=e.T49845566A159255198 |url= https://www.iucnredlist.org/species/49845566/159255198|access-date=16 December 2021}} (in Portuguese).</ref> 
| genus = Tropidurus
| species = helenae
| authority = ([Manzani](/source/species%3APaulo_Roberto_Manzani) & [Abe](/source/species%3AAugusto_Shinya_Abe), 1990)
| synonyms = *''Tapinurus helenae'' <br />{{small|Manzani & Abe, 1990}}
*''Tropidurus helenae'' <br />{{small|— [Frost](/source/Darrel_Frost), 1992}}
| synonyms_ref = <ref name=RDB/>
}}

'''''Tropidurus helenae''''' is a [species](/source/species) of [lizard](/source/lizard) in the [family](/source/Family_(taxonomy)) [Tropiduridae](/source/Tropiduridae).<ref name=RDB>{{NRDB species|genus=Tropidurus|species=helenae|access-date=5 April 2022}}</ref> The species is native to northeastern [Brazil](/source/Brazil).<ref name=RDB/>

==Etymology==
The [specific name](/source/Specific_name_(zoology)), ''helenae'', is in honor of Brazilian herpetologist [Helena Ribas Lopes](/source/species%3AHelena_Ribas_Lopes).<ref>[Beolens B](/source/species%3ABo_Beolens), [Watkins M](/source/species%3AMichael_Watkins), [Grayson M](/source/species%3AMichael_Grayson) (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. {{ISBN|978-1-4214-0135-5}}. (''Tropidurus helenae'', p. 120).</ref>

==Geographic range==
''T. helenae'' is [endemic](/source/Endemism) to the Brazilian state of [Piauí](/source/Piau%C3%AD).<ref name="iucn status 11 November 2021"/>

==Habitat==
The preferred natural [habitat](/source/habitat) of ''T. helenae'' is [savanna](/source/savanna).<ref name="iucn status 11 November 2021"/>

==Description==
The [holotype](/source/holotype) of ''T. helenae'' has a [snout-to-vent length](/source/Snout%E2%80%93vent_length) (SVL) of {{cvt|7.0|cm|in}}, plus a tail length of {{cvt|12.2|cm|in}}.<ref name="iucn status 11 November 2021"/>

==Behavior==
''T. helenae'' is [terrestrial](/source/Terrestrial_locomotion), [diurnal](/source/Diurnality), and saxicolous (rock-dwelling).<ref name="iucn status 11 November 2021"/>

==Diet==
''T. helenae'' [preys](/source/Predation) upon [termites](/source/termites).<ref name="iucn status 11 November 2021"/>

==Reproduction==
''T. helenae'' is [oviparous](/source/Oviparity).<ref name=RDB/>

==References==
{{Reflist}}

==Further reading==
*[Frost DR](/source/Darrel_Frost) (1992). "Phylogenetic analysis and taxonomy of the ''Tropidurus'' group of lizards (Iguania: Tropiduridae)". ''American Museum Novitates'' (3033): 1–68. (''Tropidurus helenae'', new combination).
*[Manzani PR](/source/species%3APaulo_Roberto_Manzani), [Abe AS](/source/species%3AAugusto_Shinya_Abe) (1990). "A New Species of ''Tapinurus'' from the Caatinga of Piaui, Northeastern Brazil (Squamata: Tropiduridae)". ''Herpetologica'' '''46''' (4): 462–467. (''Tapinurus helenae'', new species).
*[Pianka ER](/source/Eric_Pianka), [Vitt LJ](/source/species%3ALaurie_J._Vitt) (2003). ''Lizards: Windows to the Evolution of Diversity''. Berkeley: University of California Press. 346 pp. {{ISBN|978-0520234017}}. (''Tropidurus helenae'', p. 165).
*Uchôa, Lucas Rafael; Delfim, Fagner Ribeiro; [Mesquita, Daniel Oliveira](/source/species%3ADaniel_Oliveira_Mesquita); [Colli, Guarino Rinaldi](/source/species%3AGuarino_Rinaldi_Colli); [Garda, Adrian Antonio](/source/species%3AAdrian_Antonio_Garda); [Guedes, Thaís B.](/source/species%3ATha%C3%ADs_Barreto_Guedes) (2022). "Lizards (Reptilia: Squamata) from the Caatinga, northeastern Brazil: Detailed and updated overview". ''Vertebrate Zoology'' '''72''': 599–659.

{{Taxonbar|from=Q3540745}}

Category:Tropidurus
Category:Reptiles described in 1990
Category:Endemic reptiles of Brazil
Category:Lizards of Brazil

{{Tropiduridae-stub}}

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Adapted from the Wikipedia article [Tropidurus helenae](https://en.wikipedia.org/wiki/Tropidurus_helenae) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Tropidurus_helenae?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.