horned lizard

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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.
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, subphylum Vertebrata, class Reptilia, order Squamata, family Iguanidae.
References in periodicals archive ?
Geographic variation in Phrynosoma coronatum (Lacertilia: Phrynosomatidae): further evidence for a peninsular archipelago.
The Coast Horned Lizard, Phrynosoma coronatum (CHL), occurs from the Sacramento Valley, southward to the tip of Baja California.
coronatum commenced reproduction earlier in spring, perhaps concurrent with northern species of Phrynosoma (sensu Montanucci 2004, Leache et al.
lungless salamander -- -- 1 Plethodontidae genus et species unidentified -- -- 1 Salamandlidae Taricha torosa, California newt x -- -- REPTILIA, SQUAMATA Phrynosomatidae Phrynosoma coronatum, coastal horned lizard x -- -- Sceloporus graciosos, sagebrush lizard x -- -- S.
In the present study, we included new populations of Phrynosoma (one in Leon and the other in Cadereyta near localites for P.
Species (Uta stansburiana, Phrynosoma modestum, or Aspidoscelis tigris), microhabitat (species of plant), and compaction of sand were recorded at each location where adult lizards were observed.
Hyla regilla, Gambelia copei, Phrynosoma coronatum, Sceloporus zosteromus, Sceloporus occidentalis, Uta stansburiana, Coleonyx variegatus, Cnemidophorus tigris, Elgaria [cedrosensis.
Within Phrynosomatinae are the genera Callisaurus, Cophosaurus, Holbrookia, Phrynosoma, and Uma, and within Sceloporinae are Petrosaurus, Sceloporus, Urosaurus, and Uta.
This study examined the gastrointestinal tracts of 30 museum specimens of Phrynosoma cornutum collected from Chihuahuan Desert habitats in Texas, New Mexico and the Mexican state of Chihuahua.
I-VIII [includes Girard's A Monographic Essay on the Genus Phrynosoma, p.
Phrynosoma cornutum serves as an excellent indicator of the general environmental health of terrestrial ecosystems in Texas.
Only two other lizard species (Sceloporus undulatus and Phrynosoma cornutum) were observed in the area, and each was present in extremely low numbers in both habitats.