Found this Imantodes cenchoa sleeping on top of a leaf in Punta Laguna, Quintana Roo.
Here is a photo of where it was sleeping:
There are a few different snakes of the genus Imantodes in Yucatán. What sets this species apart is that the row of scales on its back consists of enlarged scales. Here is a closeup emphasizing that row of scales. The green arrow points at an enlarged mid-dorsal scale, the blue arrow at a regular scale.
In comparison, here is a photo from an Imantodes tenuissimus that I took back in 2009 in Mérida, Yucatán (with a less sharp camera), and a closeup of its mid-dorsal scales that does not show this enlargement.
Ah! As someone with a phobia of snakes, nope nope nope nope nope.
But here’s what I think is interesting: I’m actually more freaked out by it being tiny rather than less freaked out. I’d take a large python over this lil fella every day of the week. And I don’t know why that’s true! With spiders it’s the opposite, the little ones are often downright cute and the big ones tend to be pretty unpleasant.