Table 2.

Percentage of crotoxin homologs (mean and range) in venoms from individuals of the three species of Crotalus simus, according to their geographic distributions.

Species	Locality	n	% Crotoxin (Mean)	% Crotoxin (Range)
C. simus	Veracruz	6	32.8	21.6–44.3
	Oaxaca	1	14.5	14.5
	Chiapas	4	7.7	6.3–8.5
Total		11	22.0	6.3–44.3
C. tzabcan	Quintana Roo	7	4.6	0–7.7
	Yucatán	3	0	0
Total		10	3.2	0–7.7
C. culminatus	Morelos	8	0	0
	Guerrero	1	0	0
Total		9	0	0