Loreal pit

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Bothriechis lateralis. The loreal pit is visible between the eye and the nostril.
Diagram of the loreal pit.

The Loreal pit is the deep depression, or fossa, in the loreal area on either side of the head in crotaline snakes (pitvipers). It is located behind the nostril and in front of the eye, but below the line that runs between the centers of each. It is the external opening to an extremely sensitive infrared detecting organ. The loreal pit is bordered by lacunal scales.[1]

References

  1. ^ Campbell, J.A.; Lamar W.W. (2004). The Venomous Reptiles of the Western Hemisphere. Ithaca and London: Comstock Publishing Associates. pp. 870, 1500 plates. ISBN 0-8014-4141-2.
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