Who first discovered the glass frog?

The glass frog, particularly the species Centrolenella fleischmanni, was first described by the German zoologist Johann Gottfried Müller in 1923. These frogs are known for their translucent skin, which allows their internal organs to be visible. The discovery of various species of glass frogs has been attributed to multiple researchers over the years, but Müller is credited with the initial description of this remarkable group.