The natural history of frogs....
Understanding Anuran phylogeny edit
Cladistics, phylogenetic tree (image), brief discussion of evolutionary principles
Evolutionary origins edit
Basal amphibians edit
Trematops, Amphibamus lyelli (image), Doleserpeton annectens (image, possibly another image of teeth)
Triadobatrachus edit
Description, image (photo, drawing compared with Doleserpeton and with Amphibamus/modern frog)
Modern frogs edit
Vieraella, image