Fold-tongued Spectacled Tejus
Faltenzungen-Brillentejus oder -Zwergtejus
23 species of which 12 (52.2%) are endemic -
2 genera of which none are endemic
(as of December 31st, 2018).
Previously included in the family
Teiidae (e.g., Peters & Donoso-Barros 1970; Goin, Goin & Zug 1978) or,
more recently, in
(e.g., Pellegrino, Rodrigues, Yonenaga-Yassuda & Sites 2001), formerly a subfamily of the family
Teiidae, but separated from this family by Presch (1983).
Subsequently, Goicoechea, Frost, Riva, Pellegrino, Sites, Rodrigues & Padial (2016) raised the subfamily Alopoglossinae to family status, Alopoglossidae,
incl. the genera Alopoglossus and Ptychoglossus (now considered a synonym of Alopoglossus).
As for the single genus of the family, Alopoglossus.