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Cnemidophorus angusticeps
The individuals are "parthenogenetic": the populations consist of females who give birth to only females without the benefit of males. Offspring are genetic clones of their mothers. Sometimes the female Yucatan Whiptails mate with a completely different species, the Deppe's Whiptail Cnemidophorus deppei.
Yucatán Whiptails are endemic to the Yucatán Peninsula, northern Guatemala and east-central Belize, so it a petty good find, even though the species is considered common in the northern Yucatán.