Panderichthys is a genus of extinct sarcopterygian from the late Devonian period, about 380 Mya. Panderichthys, which was recovered from Frasnian deposits in Latvia, is represented by two species. P.
Restoration showing side to side undulation
Panderichthys (second from the bottom) in an evolutionary context with other tetrapodomorphs
Tiktaalik is a monospecific genus of extinct sarcopterygian from the late Devonian Period, about 375 Mya, having many features similar to those of tetrapods. Tiktaalik is estimated to have had a total
Neil Shubin, one of the paleontologists who discovered Tiktaalik, holding a cast of its skull
Skull showing otic notches above the eyes
Pectoral fin of the Australian lungfish (Neoceratodus fosteri), showing an anatomy common to many lobe-finned fish. The metapterygial axis (a line of rectangular axials) runs down the middle of the fin, flanked by radials which branch away from the midline, and finally very thin fin rays (lepidotrichia)