horned lizard

(redirected from Phrynosoma)
Also found in: Dictionary, Thesaurus, Wikipedia.
Related to Phrynosoma: horned toad

horned lizard

or

horned toad,

broad, flat-bodied lizards of the genus Phrynosoma, found in arid regions from extreme SW Canada to Guatemala. There are several species in the United States W of the Mississippi. The body is 3 to 5 in. (7.6 to 12.7 cm) long; it has a short, thin tail, a short neck, and short legs. There are spines on the head, sides, and back. Horned lizards are protectively colored, usually in dull grays and browns. They feed on insects, especially ants, and are often found buried in the sand, with only their heads exposed. In some species the female lays eggs; in others the eggs are incubated internally and the young are born alive. When alarmed, members of some species eject a thin stream of blood from the nictitating membrane of the eye for a distance of several feet. Horned lizards are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
..... Click the link for more information.
, subphylum Vertebrata, class Reptilia, order Squamata, family Iguanidae.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
References in periodicals archive ?
Horned Lizard (Phrynosoma) phylogeny inferred from mitochondrial genes and morphological characters: understating conflicts using multiple approaches.
Phrynosoma cornutum is found almost exclusively in areas with little or no vegetation, because heavy plant growth restricts its movement (Cowles 1977; Pianka & Parker 1975; Whiting et al.
Phrynosoma modestum was observed significantly more often on bare ground (n = 15, 60%; [chi square] = 30.8, df= 5, P < 0.001) and less frequently under P.
The flat-tailed horned lizard Phrynosoma mcalli has similar ornamentation of the lateral expansions as P.
Phrynosoma cornutum is listed as a threatened species in Texas and a Federal category 2 candidate species.
The current status and future prospects of the Texas horned lizard (Phrynosoma cornutum)in Texas.
El ganador de 2011 fue "Conserving species in fragmented habitats: population dynamics of the flat-tailed horned lizard, Phrynosoma mcallii," The Southwestern Naturalist 54(3):307-316, por C.
Previous studies have examined how foraging by the Texas horned lizard, Phrynosoma cornutum, may be influenced by rates of harvest of ants (Munger, 1984).
However, there are several studies on lizards from Baja California Sur that exhibit an extended period of reproductive activity in August: Phrynosoma coronatum (Goldberg 2011); Uta stansburiana (Goldberg 2012b); Callisaurus draconoides (Goldberg 2015).
PIT chips are widely applied in the study of wildlife, notably including hatchling Texas Horned Lizards Phrynosoma cornutum with snout-vent lengths as short as 20 mm (Henke 2008).
Movement, Home Range and activity patterns of the Horned Lizard, Phrynosoma mcallii.