A New Genus and New Tribe for Enicognathus melanauchen Jan, 1863, a Neglected South American Snake (Colubridae: Xenodontinae), with Taxonomic Notes on Some Dipsadinae Author Myers, Charles W. text American Museum Novitates 2011 2011-05-11 2011 3715 1 36 http://www.bioone.org/doi/abs/10.1206/3715.2 journal article 10.1206/3715.2 0003-0082 5359400 Rhadinella Smith, 1941 TYPE SPECIES : Rhadinella schistosa Smith (1941) , by original designation and monotypy . DEFINITION AND DIAGNOSIS: See group definition in Myers (1974: 119). Separated from Rhadinaea and most other dipsadines by the straight-line arrangement of several enlarged posterior maxillary teeth (ultimate fang not offset). The maxillary dentition is similar in Trimetopon , a variable genus of diminutive snakes in lower Central America that differs from Rhadinella in lacking a basal nude pocket on the hemipenis (Myers, unpublished). CONTENT: Fifteen species: Rhadinella anachoreta (Smith and Campbell) , new combination ; Rhadinella godmani (Günther) , new comb. ; Rhadinella hannsteini (Stuart) , new comb. ; Rhadinella hempsteadae (Stuart and Bailey) , new comb. ; Rhadinella kanalchutchan (Mendelson III and Kirzirian) , new comb. ; Rhadinella kinkelini (Boettger) , new comb. ; 19 Rhadinella lachrymans (Cope) , new comb. ; Rhadinella montecristi (Mertens) , new comb. ; Rhadinella pegosalyta (McCranie) , new comb. ; Rhadinella pilonaorum (Stuart) , new comb. ; Rhadinella posadasi (Slevin) , new comb. ; Rhadinella rogerromani (Köhler and McCranie) , new comb. ; Rhadinella schistosa Smith ; Rhadinella serperaster (Cope) , new comb. ; Rhadinella tolpanorum (Holm and Cruz D.) , new comb.