Acanthosaura armata
Total length male, 275-305 mm or 11-12 inches, females, 250-270 mm or 10-10 1/2 inches.
A. armata has long spines on the curve of the eyebrows and occiput that reach almost the height of the nape crest. The dorsal crest is initially the same height as the nape crest. There may or may not be a small break between the dorsal and nape crest. Armata has a small throat pouch. The back colors are varying shades of greens and browns and the lighter underside can be green, brown or reddish. Armata is found at altitudes ranging from 0-750 meters
Acanthosaura capra
Total length 305 mm or 12 inches
A. capra is lacking spines on the occiput. The tall nape crest is separated from the dorsal crest. Both consist of lanceolate scales (having shape of lance-head, especially tapering at each end), the bases of which are broader than in the other A. species. The predominant back colors are olive or brown. Color changes with mood. They show a lot of yellow when sleeping and get very dark when stressed. Capra has a large throat pouch which has streaking of rust, and yellow when extended
Acanthosaura crucigera
Total length male,259-262 mm or 10 inches, females, 212-237 mm or 8 ½ - 9 inches.
A. crucigera is the smallest and reportedly the most aggressive species of the genus. There are spines on the nape and Occiput. A wide gap separates the dorsal crest from the taller nape crest. Crucigera is recognized by the pronounced dark brown or black cross on their nape. The colors of the crucigera vary considerably
Acanthosaura lepidogaster
Total length male, 190-276 mm or 7 1/2-11 inches, females, 195-264 mm or 7 1/2-10 1/2 inches.
A. lepidogaster has short spines on the curve of the eyebrows and occiput. The dorsal crest is interrupted in the nape or is continuous with very short, closely spaced scales.
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