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This clade is endemic to Australia, New Guinea and Tasmania. Myobatrachines are generally smaller frogs with reduced ossification (See Ford and Cannatella, 1993). Myobatrachus, a head-first burrower and termite-eater that resembles Rhinophrynus, reaches 60 mm, but most of the other myobatrachines are 20-40 mm in snout-vent length. The gastric-brooding frog Rheobatrachus, which broods the developing eggs in its stomach, is also larger, 50-80 mm. It has been variously assigned to the Myobatrachinae, as its own subfamily or its own family.
The majority of myobatrachines are terrestrial or enjoy wet areas. Rheobatrachus is highly aquatic. Arenophryne is a burrowing frog in coastal sand dunes. Like its relative Myobatrachus, it burrows head-first. Some genera such as Crinia and Geocrinia inhabit swamps and wet areas. Taudactylus frequent mountain streams. Males of Assa have inguinal pouches in which larvae are reared.
The Eocene fossil †Indobatrachus has been included in this group (Spinar and Hodrová, 1985); a few Pleistocene fossils are known.