ENWC424 Lecture 7: ENWC424 Lecture 7 Lizards Part 2 and Snakes

• School: University of Delaware
• Department: Entomology and Wildlife Conservation
• Course: ENWC424
• Professor: Nate Nazdrowicz

Document Summary

Inhabit mountain streams: viviparous, varanidae (monitors and goannas, 1 genus, 80 species. Introduced to florida: medium to very large. Long necks, well-developed limbs, strong claws, and powerful non-autotomic tails: diurnal, active predators, high intelligence, some produce venom in mandibular glands, forked, snake-like tongue, oviparous, combat in males to determine dominance. Lanthanotidae (earless monitors: 1 species (lanthanotus borneensis, endemic to borneo, burrowing and semi-aquatic, short limbs & prehensile tail, external ear absent, chamaeleonidae (chameleons, 1 genera, 206 species. Insectivorous: agamidae (agamas and dragons, 53 genera, 468 species. Left lung reduced or absent: reproduction, sexual reproduction, only 1 species asexual. Little sexual dimorphism: color differences uncommon, females larger, males proportionally longer tails, genotypic sex determination, body form and structure, arboreal, small body mass (high length/mass ratio, compressed body long tail (prehensile, center of gravity shifted posteriorly. Large eyes: aquatic, dorsal and terminal placement of eyes and nostrils, valvular nostrils.