Derotrema

Tribe of Ichthyoidea (Urodele Amphibians), including forms having no gill tufts in the adult, though a branchial aperture on each side of the neck may remain. They have tooth-bearing maxillary bones. Here belong the eel-like Amphiuma of Florida, with two pairs of two-toed limbs, and the plump Menopoma, with four anterior and five posterior toes. Some of these are among the largest of existing Amphibia, IMG:content-1132.jpg:[blocks in formation] though fo il forms are much more gigantic. The Hell-bender, water-dog or "alligator" of Ohio, etc., may attain a length of two feet. The gills disappearing in the adult stage, the group Derotrema ( Amphiuma means).