By Wade C. Sherbrooke
- Features designated species money owed; supplies details on horned lizard biology, ecology, and evolution; and describes the function of those interesting reptiles in mythology, tradition, and art
- Covers the USA, Mexico, and Canada, and comprises all species of horned lizards
Read Online or Download Introduction to Horned Lizards of North America (Revised Edition) (California Natural History Guides, Volume 64) PDF
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Additional resources for Introduction to Horned Lizards of North America (Revised Edition) (California Natural History Guides, Volume 64)
In addition to determining the species of an individual horned lizard, you can also externally ascertain its sex. Typically, the male has a few enlarged, ﬂat scales on the lower side of the tail just behind the vent (pl. 2), whereas the female lacks these enlarged scales (pl. 3). The male also has distinctive INTRODUCTION 15 Plate 4. A very short tail (Bull Horned Lizard [Phrynosoma taurus]). Plate 5. Femoral pores on the underside of the male’s hind leg (Flat-tail Horned Lizard [Phrynosoma mcallii]).
25) temporal horns separate from occipitals Temporal horns fused into bull-like horns; ventral scales keeled Dark line down back; horns long/sharp; vent without black spots White line down back; dark lines on face and head Dark bands crossing back; bases of occipital horns not in contact Phrynosoma braconnieri Bull* (pl. 31) Phrynosoma taurus Flat-tail (pl. 15) Phrynosoma mcallii Texas (pl. 7) Phrynosoma cornutum Coast (pl. 9) Phrynosoma coronatum Strong eye spines; middle Giant* (pl.
Southward, it occurs in all the bordering Mexican states and Plate 8. Texas Horned Lizard (Phrynosoma cornutum) habitat in Guadalupe Mountains National Park, Texas. beyond to northern portions of Durango, Zacatecas, and San Luis Potosí. In recent years, the species has been extirpated from areas of eastern and central Texas and portions of Oklahoma. This species occurs in a variety of arid and semiarid habitats in open country having scant vegetation (pl. 8). In these habitats, grasses are often present along with scattered cacti, yucca, mesquite, acacia, juniper, or other woody shrubs and small trees.