| 1a. |
Spines on back of head, fringe of scales along side of body. |
(2) |
| 1b. |
Not as above. |
(4) |
| |
| 2a. |
Long spines on back of head, dark bars radiating from eyes. |
Phrynosoma cornutum,
Texas horned lizard |
| 2b. |
Short spines on back of head, no dark bars radiating from eyes. |
(3) |
| |
| 3a. |
Single row of fringe scales on sides of body. |
Phrynosoma hernandesi
short-horned lizard |
| 3b. |
No fringe scales on sides of body. |
Phrynosoma modestum
roundtail horned lizard |
| |
| 4a. |
Scales on back pointed. |
(5) |
| 4b. |
Scales not as above. |
(7) |
| |
| 5a. |
Black wedge-shaped mark on side of neck, up to 13 inches total length. |
Sceloporus magister,
Desert spiny lizard |
| 5b. |
No black mark on neck. |
(5) |
| |
| 6a. |
Granular scales on rear of thigh, black bar usually present on shoulder. |
Sceloporus graciousus,
Sagebrush lizard
|
| 6b. |
Keeled scales on rear of thigh, dorsal color variable. |
Sceloporus undulatus,
Eastern fence lizard |
| |
| 7a. |
Scales very shiny and smooth. |
(8) |
| 7b. |
Scales variable, but not very shiny. |
(10) |
| |
| 8a. |
Longitudinal stripes down length of very slender body; total length to about 7.75 inches. |
(9) |
| 8b. |
Individual scales clearly black and cream; total length to 13.75 inches. |
Eumeces obsoletus,
Great Plains skink |
| |
| 9a. |
Light stripe along each side of back contrasting strongly with brown body and dark stripes; occurs south and west of Arkansas River. |
Eumeces gaigeae,
variable skink |
| 9b. |
Body tan with several dark stripes; occurs north and east of Arkansas River. |
Eumeces multivirgatus,
Many-lined skink
|
| |
| 10a. |
No external ear openings. |
Holbrookia maculata,
Lesser earless lizard |
| 10b. |
External ear openings visible. |
(11) |
| |
| 11a. |
Large and rectangular belly scales, neck not distinctly indented between head and body. |
(12) |
| 11b. |
Not as above. |
(16) |
| |
| 12a. |
Checkered pattern. |
(13) |
| 12b. |
Stripes running length of body. |
(15) |
| |
| 13a. |
Scales in front of gular fold abruptly enlarged; occurs on eastern slope. |
(14 - Cnemidophorus
tesselatus complex) |
| 13b. |
Scales in front of gular fold not abruptly enlarged; occurs on western slope. |
Cnemidophorus tigris,
Western whiptail |
| |
| 14a. |
Posterior of thigh spotted or reticulated; double or single vertebral line from neck to base of tail, connected to paravetebral stripes in neck region by pale transverse bars. |
Cnemidophorus tesselatus,
diploid checkered whiptail |
| 14b. |
Unbroken, irregular pale streak on posterior surface of one or both thighs; Vertebral line single and complete or present only on the neck and rump regions (if complete, usually no transverse bars in neck region connecting to paravertebral stripes) ... |
Cnemidophorus neotesselatus,
triploid checkered whiptail |
| |
| 15a. |
Occurs on eastern slope. |
Cnemidophorus sexlineatus,
Six-lined racerunner |
| 15b. |
Occurs on western slope. |
Cnemidophorus velox,
Plateau striped whiptail |
| |
| 16a. |
Dark "collar" on neck. |
Crotaphytus collaris,
Collared lizard |
| 16b. |
Not as above. |
(17) |
| |
| 17a. |
Conspicuous brown dots on back. |
Gambelia wislizenii,
Longnose leopard lizard |
| 17b. |
Not as above. |
(18) |
| |
| 18a. |
Row of enlarged scales down middle of back. |
Urosaurus ornatus,
Tree lizard |
| 18b. |
Scales down middle of back not enlarged; black spot on chest behind foreleg. |
Uta stansburiana,
Side-blotched lizard |
Site designed and hosted by:
WebSpinners.com
(info@webspinners.com)