Phylogenetics, classification, and biogeography of the treefrogs (Amphibia: Anura: Arboranae) Author Duellman, William E. Author Marion, Angela B. Author Hedges, Blair text Zootaxa 2016 4104 1 1 109 journal article 10.11646/zootaxa.4104.1.1 9b3e7716-1099-48ca-803b-620c25d788f1 1175-5326 265809 D598E724-C9E4-4BBA-B25D-511300A47B1D Subfamily Scinaxinae New Subfamily Scinaxinae . Type genus: Scinax Wagler, 1830 . Definition. Small to medium-sized frogs with sacral diapophyses not expanded; in dorsal view, snout acutely rounded to acute with projecting proboscis. Content. Four genera and 126 species. Distribution. Mostly South America from Uruguay , northern Argentina , and northwestern Peru northward through Central America to southern and eastern Mexico ; Islands of Tobago , Trinidad , and Saint Lucia . Etymology. The familial name is derived from the Greek skinos meaning quick or nimble, an appropriate name for these agile frogs. Remarks. The support value is high (97%) for the cluster of three of the genera ( Julianus , Ololygon , and Scinax ), but the placement of Sphaenorhynchus as the sister taxon of the others is low (49%); thus, the relationships of Sphaenorhynchus are equivocal.