---
title: "Roundtail horned lizard"
description: "Phrynosoma modestum — Reptielen. The roundtail horned lizard (Phrynosoma modestum) is a species of lizard in the family Phrynosomatidae."
canonical: https://animalchecklist.com/nl/animal/roundtail-horned-lizard
last_updated: 2026-09-20
---

# Roundtail horned lizard

> Phrynosoma modestum — Reptielen. The roundtail horned lizard (Phrynosoma modestum) is a species of lizard in the family Phrynosomatidae.

- Scientific name: *Phrynosoma modestum*
- Category: `reptiles` (Reptielen)
- Habitats: `desert` (Woestijn)
- iNaturalist observations: 3043
- Wikidata: [Q339612](https://www.wikidata.org/wiki/Q339612)
- iNaturalist taxon: [36306](https://www.inaturalist.org/taxa/36306)

## Names

- en: Roundtail Horned Lizard
- de: Rundschwanz-Krötenechse
- es: Tapayatxin
- nl: Roundtail horned lizard

## Countries with the most observations

US (2224), MX (640)

## Summary

The roundtail horned lizard (Phrynosoma modestum) is a species of lizard in the family Phrynosomatidae. It is one of the smaller species of the horned lizards (genus Phrynosoma). The specific epithet, modestum, is Latin, meaning "modest" or "calm". The species is native to the United States, in western Texas, New Mexico, eastern Arizona, and southeastern Colorado; and eight states in northcentral Mexico, where it is referred to as tapayaxtin.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Roundtail_horned_lizard

## Photo

![Roundtail horned lizard](https://animalchecklist.com/img/animals/roundtail-horned-lizard/medium.jpg)

Photo: William · CC0 · inaturalist — https://www.inaturalist.org/observations/236166042

## Machine access

`GET https://animalchecklist.com/api/v1/animals/roundtail-horned-lizard?lang=nl` — see [openapi.json](https://animalchecklist.com/openapi.json).