Atractus reticulatus (A. ret), Bothrops alternatus (B. alt), Bothrops diporus (B. dip), Erythrolamprus jaegerii (E. jae), Erythrolamprus poecilogyrus (E. poe), Erythrolamprus semiaureus (E. sem), Helicops infrataeniatus (H. inf), Helicops leopardinus (H. leo), Hydrodynastes gigas (H. gig), Leptophis ahaetulla (L. aha), Lygophis anomalus (L. ano), Mastigodryas bifossatus (M. bif), Micrurus altirostris (M. alt), Micrurus pyrrhocryptus (M. pyr), Mussurana bicolor (M. bic), Paraphimophis rustica (P. rus), Philodryas patagoniensis (P. pat), Philodryas olfersii (P. olf), Philodryas aestiva (P. aes), Sibynomorphus turgidus (S. tur), Thamnodynastes chaquensis (T. cha), Thamnodynastes hypoconia (T. hyp), Thamnodynastes strigatus (T. str), Xenodon dorbingyi (X. dor), Xenodon merremii (X. mer).