Calotes mystaceus
species of reptile
Calotes mystaceus, the Indo-Chinese forest lizard or blue crested lizard, is an agamid lizard found in China, South Asia and Southeast Asia.
Description and identification
Physical Structure: Upper head-scales smooth or feebly keeled, imbricate, scarcely enlarged on supraorbital region; a few small spines on each side of the head above the tympanum; latter measuring at least half the diameter of the orbit. Gular sac small; gular scales feebly keeled, as large as dorsals. An oblique fold in front of the shoulder. Dorso-nuchal crest well developed in the male, composed of falciform spines directed backwards, the longest measuring the diameter of the orbit; it gradually decreases in height on the back, being reduced to a mere denticulation on the sacrum. 45-53 scales round the middle of the body; dorsal scales keeled, nearly twice as large as ventrals, all directed upwards and backwards; ventral scales strongly keeled. The adpressed hind limb reaches the tympanum or the posterior border of the orbit; fourth finger slightly longer than the third. Tail a little compressed, at the base with a slightly serrated upper ridge.
Color Pattern: Background color grey to olive, frequently with large transverse red spots on the back; lips yellowish.
Length: Maximum: 42 cm.
Begin with the source’s own compact description: “Calotes mystaceus” is species of reptile. The dossier treats that line as a proposition to test through Calotes, mystaceus and species, not as a finished interpretation.
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The phrase “species of reptile” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Mar 1, 2026. The linked authority identifier is Q2548440. None of the 0 selected statements returned an explicit reference.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Calotes mystaceus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.