US Lizards

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Author:
Anonymous
ID:
14473
Filename:
US Lizards
Updated:
2010-04-14 11:36:33
Tags:
lizards
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Description:
lizards in us
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  1. ANGUIDAE
    Ophisaurus
    • Glass lizards
    • Ear opening present
    • A well defined fold along each side
    • Neither forelimbs nor hindlimbs evident externally
  2. ANGUIDAE
    Anniella
    • Body covered by smooth cycloid sclaes not arragned in annuli as described above
    • No ear opening
    • No lateral fold
    • No limbs
  3. ANGUIDAE
    Elgaria
    • Alligator lizard
    • No median scale behind rostral
    • nasals contact the rostral
    • A granular fold along sides of the body
    • dorsal and ventral scales large, overlapping
    • Eyelids movable
  4. ANGUIDAE
    Gerrhonotus
    • A small median scale bordering rostral posteriorly
    • Nasal separated from rostral by a lateral scale on each side
    • A granular fold along sides of the bodydorsal and ventral scales large, overlapping
    • Eyelids movable
  5. RHINEURIDAE
    Rhineura
    • Amphisbaenian
    • Eye not discernable
    • Body encircled by numerous earthworm-like rings
    • No ear opening
    • No lateral fold
    • No limbs
  6. XANTUSIIDAE
    Xantusia
    • Night lizards
    • Head covered with large, flat plates
    • Ventral plates quadrangular
    • 12 or 14 longitudinal rows of squarish scales on belly
    • No eyelids
  7. GEKKONIDAE
    Sphaerodactylus
    • Dwarf Geckos
    • Head covered with granular scales
    • Ventral plates rounded
    • A single round pad at tips of toes
  8. GEKKONIDAE
    Coleonyx
    • Gecko
    • Lamellae on underside of digits without keels and not enlarged or expanded
    • Digits on hindlimbs varying in length
    • Small belly scales
    • No granular fold
    • No eyelids
  9. SCINCIDAE
    Eumeces
    • Supranasals present separating frontonasals from rostral
    • Eyelids scaly
    • Stripes
    • Longer legs
    • All scales smooth flat rounded equal in size
  10. SCINCIDAE
    Scincella
    • Ground Skinks
    • No supranasals
    • Frontonasal in contact with rostral
    • Lower eyelid with a window
    • No stripes
    • Longer legs
    • All scales smooth flat rounded equal in size
  11. SCINCIDAE
    Neoseps
    • Legs very short, with not over 2 digits
    • Translucent window
    • All scales smooth flat rounded equal in size
    • No granular fold
  12. TEIIDAE
    Cnemidophorus
    • Whiptail
    • Belly scales very large, quadrangular in 8 longitudinal series
    • No granular fold
    • Eyelids
  13. HELODERMATIDAE
    Heloderma
    • Gila Monsters
    • Digits on hindlimbs of nearly equal length
    • Belly scales quadrangular
    • Beadlike granules
    • Smaller belly scales
    • Eyelids
  14. POLYCHROTIDAE
    Anolis
    • Anoles
    • Ventral lamellae on next to last phalanx of digits expanded laterall, padlike
    • No femoral pores
    • Digits varying in length
    • Belly scales smaller, pointed or rounded, not quandrangular
    • No granular fold
    • Eyelids
  15. PHRYNOSOMATIDAE
    Phrynosoma
    • Horned Lizards
    • Head bearing bony spines posteriorly, or elevated somewhat in a projecting ridge
    • No pads on lamellae
    • Digits varying in length
    • Belly scales smaller, pointed or rounded, not quandrangular
    • No granular fold
    • Eyelids
  16. PHRYNOSOMATIDAE
    Cophosaurus
    • Greater earless lizard
    • Tail flat with broad black bands on ventral surface
    • Two large black bars on side in front of hind legs
    • No ear openening
    • Sutures between supralabials diagonal, not vertical
    • Median Postmental
    • Normal head
    • Not padlike lamellae
    • Digits varying in length
    • Belly scales smaller, pointed or rounded, not quandrangular
    • No granular fold
    • Eyelids
  17. PHRYNOSOMATIDAE
    Holbrookia
    • Lesser earless lizard
    • Tail round with no black markings on ventral
    • Two small black bars on one side
    • No ear openening
    • Sutures between supralabials diagonal, not vertical
    • Median Postmental
    • Normal head
    • Not padlike lamellae
    • Digits varying in length
    • Belly scales smaller, pointed or rounded, not quandrangular
    • No granular fold
    • Eyelids
  18. PHRYNOSOMATIDAE
    Uma
    • Fringe toed lizard
    • Interparietal subequal to or smaller than nasal opening
    • A distinct ear opening
    • Sutures between supralabials diagonal, not vertical
    • Median Postmental
    • Normal head
    • Not padlike lamellae
    • Digits varying in length
    • Belly scales smaller, pointed or rounded, not quandrangular
    • No granular fold
    • Eyelids
  19. PHRYNOSOMATIDAE
    Callisaurus
    • Zebra Tailed lizard
    • Interparietal much larger than nasal opening
    • A distinct ear opening
    • Sutures between supralabials diagonal, not vertical
    • Median Postmental
    • Normal head
    • Not padlike lamellae
    • Digits varying in length
    • Belly scales smaller, pointed or rounded, not quandrangular
    • No granular fold
    • Eyelids
  20. PHRYNOSOMATIDAE
    Sceloporous
    • Spiny Lizards
    • No transverse gular fold
    • Middorsal row of scales no larger paravertebral scales
    • Femoral pores
    • Nasal separated from rostral
    • Sutures between supralabials vertical
    • Mental larger, no bordered by median postmental
    • Superciliary scales strongly imbricate, large
  21. PHRYNOSOMATIDAE
    Petrosaurus
    • Rock lizards
    • Dorsal Scales small granular, smorth
    • enlarged supraoculars
    • one or more blackish bars across shoulders
    • Smaller in size
  22. PHRYNOSOMATIDAE
    Urosaurus
    • Tree lizards
    • Dorsal body scales mostly granular, but some enlarged
  23. PHRYNOSOMATIDAE
    Uta
    • Side-blotched lizards
    • Dorsal body scales uniform in size, gradually merging with laterals
    • Often a rounded blue blotch behind axila
  24. IGUANIDAE
    Dipsosaurus
    • Desert Iguanas
    • A single median dorsal longitudinal series of scales
    • Transverse gular fold
  25. IGUANIDAE
    Sauromalus
    • Chuckwalla
    • Supercilliary scales not imbricate but juxatoposed, like other scales on head
    • Large fold
  26. CROTAPHYTIDAE
    Crotaphytus
    • Collared lizard
    • Two scales bordering mental posteriorly
    • Broad head
    • Caudal scales smaller not pointed
  27. CROTAPHYTIDAE
    Gambelia
    • Leopard Lizard
    • Three or more scales bordering mental posteriorly between infralabials
    • Elongate head
    • Small caudal scales, not pointed

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