Early or basal Permian neodiaspids were lizard-like, but already include specialised forms for swimming ( " Claudiosaurus " ) and gliding ( Coelurosauravidae ), as well as more conventional lizard-like forms ( " Youngina " etc . ).
Other extinct taxa on which he has published include the Ypresian crocodilian " Dyrosaurus phosphaticus ", thalattosuchian crocodilians, the Triassic presumed ichthyosaur " Omphalosaurus nisseri ", other ichthyosaurs, the Permian diapsid " Claudiosaurus germaini ", champsosaurids, the placodont " Placodus ", Plesiosauria, the early snakes " Carentonosaurus mineaui " among reptiles, and early cetaceans and sirenians among mammals.