De Rivero & Tschudi: Lámina XLII (right);
Codazzi: pp 85-86, Lámina I, No. 2;
Cuervo Márquez: pp 117–18, Fig. 2;
Preuss: pp 54–55, Plate 6, #'s 3–4, and 7, #1;
Lunardi: (1934) Lámina 46;
Walde–Waldegg: Plate VIII–3;
Pérez de Barradas: p 30, Lámina 17–A;
Arango: Fig. 20, bottom–right;
Duque: pp 437–38, Lámina 33–2;
Reichel–D: p 111, Plate 66;
Gamboa H: Plate 5;
Sotomayor/Uribe: p 135;
Dellenback: pp 290-1, drawing p 525; (2012) p 335, illus p 333;
(+) Go to the Bibliography