Species in the genus Cerrophidion grow to a maximum total length (including tail) of 82.2 cm (32.4 in) (for C. godmani), but usually do not exceed 50–55 cm (20–22 in). The head scalation is highly variable, with some scales being enlarged, especially in the frontal region. The fact that the prelacunal is not fused with any of the supralabial scales is characteristic for this genus. The rest of the scalation is as follows: 1-7 intersupraoculars, 7-11 supralabials, 8-12 sublabials, 120-150 ventral scales, 22-36 subcaudal scales (undivided), and 17-21 rows (rarely 23) of dorsal scales at midbody.[2]
^ abcdeCampbell JA, Lamar WW (2004). The Venomous Reptiles of the Western Hemisphere. Ithaca and London: Comstock Publishing Associates. 870 pp., 1,500 plates. ISBN0-8014-4141-2.
Campbell JA, Lamar WW (1992). "Taxonomic status of miscellaneous Neotropical viperids, with the description of a new genus". Occasional Papers of the Museum of Texas Tech University153: 1-31. (Cerrophidion, new genus, p. 24).
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