Teiidae — Whiptails and Tegus
Species I've seen:
Ameiva — Ameivas
Ameiva ameiva
Giant Ameiva
Ameiva praesignis
Dusky Ameiva
Aspidoscelis — Whiptails
Aspidoscelis costatus
Western Mexico Whiptail
Aspidoscelis exsanguis
Chihuahuan Spotted Whiptail
Aspidoscelis flagellicauda
Gila Spotted Whiptail
Aspidoscelis hyperythra
Orange-throated Whiptail
Aspidoscelis inornata
Little Striped Whiptail
Aspidoscelis marmorata
Marbled Whiptail
Aspidoscelis scalaris
Plateau Spotted Whiptail
Aspidoscelis sexlineata
Six-lined Racerunner
Aspidoscelis sonorae
Sonoran Spotted Whiptail
Aspidoscelis sp
unidentified species
Aspidoscelis stictogramma
Giant Spotted Whiptail
Aspidoscelis tesselata
Common Checkered Whiptail
Aspidoscelis tigris
Tiger Whiptail
Aspidoscelis uniparens
Desert Grassland Whiptail
Aspidoscelis velox
Plateau Striped Whiptail
Aspidoscelis xanthonota
Red-backed Whiptail
Cnemidophorus — South American Whiptails
Cnemidophorus augusticeps
Yucatán Whiptail
Crocodilurus — Crocodile Tegus
Dracaena — Caiman Lizards
Dracaena guianensis
Northern Caiman Lizard
Holcosus — Middle American Ameivas
Holcosus festivus
Central American Ameiva
Holcosus leptophrys
Delicate Ameiva
Holcosus quadrilineatus
Four-lined Ameiva
Holcosus undulatus
Rainbow Ameiva
Kentropyx — no known English name
Kentropyx altamazonica
Cocha Whiptail
Kentropyx pelviceps
Forest Whiptail
Pholidoscelis — Caribbean Ameivas
Pholidoscelis erythrocephalus
Orange-faced Ameiva
Pholidoscelis exsul
Puerto Rican Giant Ameiva
Pholidoscelis plei
Anguilla Bank Ameiva
Pholidoscelis taeniurus
Hispaniolan Blue-tailed Ameiva
Salvator — Salvator Tegus
Salvator merianae
Argentine Giant Tegu
Tupinambis — Tegus