Wagler, 1830, "Systema Amphibiorum."
Testudines, Crocodili, Lacertae, Serpentes, Angues, Coeciliae, Ranae, Ichthyodi.
Ranae I. AGLOSSA.
Ra"ae II. PHANEROGLOSSA: 1. Cauda nulla. [The Anura.]
Ra"ae II. PHANER" GLOSSA: 2. Cauda distincta. [The Salamandridae.]
Ichthyodi I. ABRANCHIALES. Menopoma [Cryptobranchus] and Amphiuma.
Icht"yodi II. BRANCHIALES. [The Perennibranchiate Urodela.]
J. Müller, 1831, "Beiträge zur Anatomie ... der Amphibien."[[6]]
Gymnophiona, Derotremata, Proteidae, Salamandrina, Batrachia.
J. Bell, 1836, Todd's "Cyclopaedia of Anatomy and Physiology," Art. "Amphibia."