Table 1. Taxa included in the study and the sample size (N) for each taxon. An asterisk designates a West Indian taxon.
Taxon N Taxon N

Amastridium veliferum 1 Geophis zeledoni 1
*Alsophis antillensis 3 *Hypsirhynchus ferox 5
*Alsophis cantherigerus 5 *Ialtris dorsalis 1
Alsophis elegans 2 Imantodes cenchoa 7
*Alsophis portoricensis 4 Imantodes inornatus 3
*Alsophis rijersmai 1 Leptodeira septentrionalis 10
*Alsophis vudii 4 Manolepis putnami 1
*Antillophis parvifrons 15 Nerodia fasciata 8
*Arrhyton callilaemum 4 Ninia maculata 1
*Arrhyton exiguum 3 Ninia psephota 1
*Arrhyton funereum 6 Oxyrhopus petola 3
*Arrhyton landoi 4 Rhadinaea calligaster 4
*Arrhyton polylepis 2 Rhadinaea godmani 1
*Arrhyton taeniatum 1 Saphenophis sneiderni 1
Coniophanes fissidens 4 Sibon nebulata 2
Conophis lineatus 1 Tretanorhinus nigroluteus 1
Crisantophis nevermanni 1 *Uromacer catesbyi 20
*Darlingtonia haetiana 10 *Uromacer frenatus 15
Enulius flavitorques 1 *Uromacer oxyrhynchus 6
Farancia abacura 2 Urotheca ( = Rhadinaea) guentheri 1
Geophis hoffmanni 2 Xenodon rabdocephalus 1