An adult Round-tailed Horned Lizard (iNat 165990394) from Potter County, Texas. Image by iNat user cactusflower79.
REPTILIA (Reptiles) SQUAMATA (PART) (Other Lizards) PHRYNOSOMATIDAE (Sand and Spiny Lizards)

Round-tailed Horned Lizard
Phrynosoma modestum


Conservation Status:

State: None

Federal: None
NatureServe State: None - None
NatureServe National: None - None
NatureServe Global: None - None
CITES: None
Diagnosis:


Distribution:

(,   Museum Voucher) (,   Observation) (,   Literature Record) (,   iNat Record), (  Fossil)
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  • Occurrence Summary:  
  • 8
    Records 
  • 8
    Museum Vouchers 
  • 0
    Other Observations 
Some county occurrences indicated below may be too imprecise to map above.
County Breakdown: County Name (# occurrences):
Meade (8);

Fossil History:
Fossils from the Cragin Quarry Local Fauna of Meade County (Pleistocene: Sangamonian) (Hay 1917; Etheridge 1958; Etheridge 1960, Tihen 1960; Tihen 1962; Brattstrom 1967; Preston 1979; Holman 1995) are assignable to this taxon.

Natural History:


Occurrence Activity:
Number of Unique Obervations (=days): 0; Range: 01 Jan to 01 Jan
Remarks:


Bibliography:
1952 Reeve, Wayne L. Taxonomy and distribution of the horned lizards genus Phrynosoma. University of Kansas Science Bulletin 34(14):817-960
1958 Etheridge, Richard E. Pleistocene lizards of the Cragin Quarry fauna of Meade County, Kansas. Copeia 1958(2):94-101
1960 Etheridge, Richard E. Additional notes on the lizards of the Cragin Quarry fauna. Papers of the Michigan Academy of Science, Arts and Letters 45():113-117
1962 Tihen, Joseph A. A review of new world fossil bufonids. American Midland Naturalist 68(1):1-50
1967 Brattstrom, Bayard H. A succession of Pliocene and Pleistocene snake fauna from the High Plains of the United States. Copeia 1967(1):188-202
An examination (or in many cases, a re-examination) of 11,000 accumulated skeletal elements from fossil deposits collected at various sites and ranging in age from Lower Pliocene to the Recent.
1979 Preston, Robert E. Late Pleistocene cold-blooded vertebrate faunas from the mid-continental United States, I. Reptilia: Testudines, Crocodilia. University of Michigan Museum of Palenontology, Papers on Paleontology. (19):1-53.
1979 Preston, Robert E. Late Pleistocene cold-blooded vertebrate faunas from the mid-continental United States, I. Reptilia: Testudines, Crocodilia. University of Michigan Museum of Palenontology, Papers on Paleontology. (19):1-53.
1984 Secor, Stephen M. and Charles C. Carpenter. Distribution maps of Oklahoma reptiles. Oklahoma Herpetological Society Special Publication (3):1-57
1987 Montanucci, Richard R. A phylogenetic study of the horned lizards, genus Phrynosoma, based on skeletal and external morphology. Natural History Museum of Los Angeles County, Contributions in Science (390):1-36
1995 Holman, J. Alan. Pleistocene Amphibians and Reptiles. Oxford University Press, New York. 243pp.
1998 Powell, Robert, Joseph T Collins, and Errol D Hooper Jr. A Key to Amphibians & Reptiles of the Continental United States and Canada. Univ Press of Kansas, Lawrence, Kansas. 131pp.
2012 Powell, Robert, Joseph T Collins, and Errol D Hooper Jr. Key to the Herpetofauna of the Continental United States and Canada: Second Edition, Revised and Updated. Univ Press of Kansas, Lawrence, Kansas. 152pp.
2017 Crother, Brian I. (editor) Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding. Eighth edition. Herpetological Circulars (43):1-102
2019 Powell, Robert, Joseph T Collins, and Errol D Hooper Jr. Key to the Herpetofauna of the Continental United States and Canada. Third Edition. Univ Press of Kansas, Lawrence, Kansas. 192pp.
Account Last Updated:
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Travis W. Taggart © 1999-2025 — w/ Sternberg Museum of Natural History, Fort Hays State University