Figure 1
From: Do mudskippers and lungfishes elucidate the early evolution of four-limbed vertebrates?
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1936-6434-6-8/MediaObjects/12052_2013_Article_8_Fig1_HTML.jpg)
Basic features of the two classes of bony fishes, the ray-finned fishes (Actinopterygii) (a), and the lobe-finned fishes (Sarcopterygii) (b) (adapted from Buergin 1998 ).