Animalia > Chordata > Squamata > Phrynosomatidae > Phrynosoma > Phrynosoma modestumPhrynosoma modestum (Roundtail Horned Lizard; round-tailed horned lizard)The roundtail horned lizard (Phrynosoma modestum) is one of the smaller species of horned lizard. Their specific epithet is from the Latin word modestum, meaning modest or calm. They are found in the United States, in western Texas, New Mexico eastern Arizona, southeastern Colorado and eight states in northcentral Mexico where they are referred to as "tapayaxtin". |
Adult Weight [1] | 8.3 grams | Female Weight [2] | 8 grams | ![](/img/transp.gif) | Gestation [2] | 53 days | Litter Size [2] | 12 | Litters / Year [2] | 2 | Reproductive Mode [3] | Oviparous | Snout to Vent Length [2] | 2.362 inches (6 cm) | ![](/img/transp.gif) | Habitat Substrate [3] | Terrestrial |
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Name |
Countries |
Ecozone |
Biome |
Species |
Report |
Climate |
Land Use |
Central and Southern mixed grasslands |
United States |
Nearctic |
Temperate Grasslands, Savannas, and Shrublands |
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Central Mexican matorral |
Mexico |
Nearctic |
Deserts and Xeric Shrublands |
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Chihuahuan desert |
Mexico, United States |
Nearctic |
Deserts and Xeric Shrublands |
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Colorado Plateau shrublands |
United States |
Nearctic |
Deserts and Xeric Shrublands |
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Edwards Plateau savanna |
United States |
Nearctic |
Temperate Grasslands, Savannas, and Shrublands |
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Meseta Central matorral |
Mexico |
Nearctic |
Deserts and Xeric Shrublands |
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Sierra Madre Occidental pine-oak forests |
Mexico, United States |
Nearctic |
Tropical and Subtropical Coniferous Forests |
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Sierra Madre Oriental pine-oak forests |
Mexico, United States |
Nearctic |
Tropical and Subtropical Coniferous Forests |
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Sonoran desert |
Mexico, United States |
Nearctic |
Deserts and Xeric Shrublands |
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Tamaulipan matorral |
Mexico |
Nearctic |
Deserts and Xeric Shrublands |
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Tamaulipan mezquital |
Mexico, United States |
Nearctic |
Deserts and Xeric Shrublands |
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Western short grasslands |
United States |
Nearctic |
Temperate Grasslands, Savannas, and Shrublands |
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Name |
IUCN Category |
Area acres |
Location |
Species |
Website |
Climate |
Land Use |
Amistad National Recreation Area |
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Texas, United States |
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Bandelier National Monument |
V |
8107 |
New Mexico, United States |
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Big Bend Biosphere Reserve National Park |
II |
815561 |
Texas, United States |
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Carlsbad Caverns National Park |
II |
15448 |
New Mexico, United States |
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Fort Bowie National Historic Site |
III |
1004 |
Arizona, United States |
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Fort Davis National Historic Site |
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Texas, United States |
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Guadalupe Mountains National Park |
II |
46114 |
Texas, United States |
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Jornada Biosphere Reserve |
Ib |
30913 |
New Mexico, United States |
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Reserva de la Biosfera Sierra Gorda Biosphere Reserve |
VI |
955579 |
Queretaro, Mexico |
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Reserva de Mapimi Biosphere Reserve |
VI |
849819 |
Chihuahua, Mexico |
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Sevilleta LTER Site Long Term Ecological Research |
IV |
228335 |
New Mexico, United States |
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White Sands National Monument |
III |
139922 |
New Mexico, United States |
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Attributes / relations provided by ♦ 1Length–weight allometries in lizards, S. Meiri, Journal of Zoology 281 (2010) 218–226 ♦ 2Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109 ♦ 3Meiri, Shai (2019), Data from: Traits of lizards of the world: variation around a successful evolutionary design, Dryad, Dataset, https://doi.org/10.5061/dryad.f6t39kj ♦ 4Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database |
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0
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