Most herbivorous dinosaurs are ornithischians, and basically all ornithischians are herbivorous. The early ornithischians look superficially similar to early saurischians, but they evolved later. The earliest ornithischians include dinosaurs like Pisanosaurus from the Late Triassic of South America and Eocursor from South Africa, which lived about 210 million years ago.
|Eocursor,an early ornithischian. (Image from Wikimedia Commons user ArthurWeasley)|
|Huayangosaurus (image from Wikimedia Commons user ArthurWeasley)|
|Iguanodontian heads (left column then right column): Ouranosaurus, Muttaburrasaurus, Corythosaurus, Lambeosaurus magnicristatus and Lambeosaurus lambei. (image from Wikimedia Commons user FunkMonk)|
|Skull of Pachycephalosaurus from Wikimedia Commons user Dudo|
|Psittacosaurus (image from Wikimedia Commons user ArthurWeasley)|
|Ceratopsian skull diversity. Some genera include Styracosaurus (bottom left), Centrosaurus (right of Styracosaurus), Achelosaurus (?) (top right of left section), Chasmosaurus (centre), Kosmoceratops (just to the right of center on the bottom with 2 large horns), and Triceratops (?) (top right). Image from Wikimedia Commons from Flickr user Magnus Manske.|
Ornithischians at Jurassic Forest:
Most of the stuff from this week came from my brain, but some good sites to check out include:
The Paleobiology Database - this site is run by palaeontologists and is a good place to get information on things like dates classification, and where fossils are found. It is a bit technical though.