Nasal scale

"Prenasal" redirects here. For the phonetic meaning, see Prenasalized consonant.
"Postnasal" redirects here. For the phonetic meaning, see Nasal release. For the cause of cough, see Post-nasal drip.
Prenasal and postnasal scales

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 located above the nasal scale.[1]

See also

References

  1. ^ a b 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 of the United States and Canada. Ithaca and London: Comstock Publishing Associates, a Division of Cornell University Press. (7th printing, 1985). 1,105 pp. ISBN 0-8014-0463-0.