Nasal scales

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In reptiles, the nasal scale refers to the scale that encloses the nostril.[1] Sometimes this scale is paired (divided). In such cases, the anterior half is referred to as the prenasal and the posterior half is referred to as the postnasal.[2] Supranasal scales are those located above the nasal scale.[1]

## Cited references[edit]

1. ↑ 1.0 1.1 Mallow D, Ludwig D, Nilson G. 2003. True Vipers: Natural History and Toxinology of Old World Vipers. Malabar, Florida: Krieger Publishing Company. 359 pp. ISBN 0-89464-877-2.
2. ↑ Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates (7th printing, 1985). 1105 pp. ISBN 0-8014-0463-0.