We present a phylogenetic analysis of the New World dipsadids based on an expanded data matrix that includes 246 terminal taxa including 196 dipsadids. The species are sampled for eight genes (12S, 16S, cytb, nd2, nd4, bdnf, c‐mos, rag2). The data are explored using two distinct optimality procedures—maximum parsimony and maximum likelihood—and two alignment strategies—dynamic homology and static homology. Two previously unsampled dipsadid genera, Sordellina and Rhachidelus, are now included in the analysis. The definitions of the genera, Erythrolamprus, Clelia, Hypsirhynchus, Philodryas and Phimophis, and the tribes Alsophiini, Echinantherini and Conophiini, are revised. In order to maintain monophyly, the genus Umbrivaga is synonymized with Erythrolamprus, and two new genera are erected to accommodate Phimophis iglesiasi and Clelia rustica, as well as their closely related species. The West Indian genera Schwartzophis, Darlingtonia, Antillophis and Ocyophis are resurrected. © The Willi Hennig Society 2012.

The name Herpetodryas reticulata Peters, 1863, is revalidated and assigned to the snakes of the genus Mastigodryas from the dry forests of central and southwestern Ecuador. Mastigodryas reticulatus (Peters, 1863) is characterized by the presence of a striped dorsal pattern, with the upper light lateral stripe formed by two scale rows (4 and 5); dorsal scales with dark apical edges; a light, immaculate throat and venter; a higher number of ventral scales; an elongate and nude region on the base of the hemipenis; and thin, enlarged spines located lateral to the sulcus spermaticus on the distal region of the body of the hemipenis. This species is a member of the M. boddaerti Group, along with M. boddaerti and M. heathii.