A revision and key for the tribe Diaphorolepidini (Serpentes: Dipsadidae) and checklist for the genus Synophis Author Pyron, R. Alexander Author Arteaga, Alejandro Author Echevarría, Lourdes Y. Author Torres-Carvajal, Omar text Zootaxa 2016 4171 2 293 320 journal article 10.11646/zootaxa.4171.2.4 9529a751-bd3c-46a8-83d7-ea7641844e11 1175-5326 158885 CDE07944-2354-477E-A3DA-61B713858D0C 6. Synophis insulomontanus Torres-Carvajal, Echevarría, Venegas, Chávez, & Camper, 2015 Range. Amazonian Andean slopes of central Peru , ~ 1100–1800m . Description. Adult size ~ 340–380mm SVL and ~ 180–190mm TL (assuming> 340mm SVL is adult, and CORBIDI10418 has a truncated tail), keeled nuchal scales; no nuchal collar; intranasals in contact; 2 postoculars; 10–11 infralabials; 8–9 supralabials; 147–152 ventrals; 103–109 subcaudals; and (20-22)–(19-21)-19 dorsal scalerows, with single, heavy keel. Notes. Known only from the holotype and paratypes.