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Guidelines for dinosaur restorations

If a dinosaur restoration is to be used in an article, the minimum requirements for anatomical accuracy are as follows. Read the guide before putting an image up for review. Please expand on this list as new information comes along, and cite published papers on the matters, if such exist.

General guidelines for
dinosaurs

Most dinosaurs held their necks in an s-shaped curve, and theropod dinosaurs would probably not have been able to stretch the neck out of this pose.^[1]
When restoring the eye of a dinosaur, always make sure to make the
sclerotic ring, if such is not present in the skeletal restoration used as reference, use one of a related genus for reference instead.[1]
- As an addendum, when you restore the eye of a non-avian dinosaur, use birds and crocodylians as guidelines. As such, restoring dinosaurs with pupils facing away from where the head is positioned is most likely inaccurate; although some birds (like the great cormorant) can move their eyes independently of the head, this is not the norm for birds and as such is unlikely to have been a norm in other dinosaurs.
The nostril should always be placed at the front end of the bony naris.[2]
Beaks, horns, spikes and claws should be restored longer than they appear from the bones, as these were covered and extended by keratin.
The colours are not known for most dinosaurs, but in general, large modern animals usually have drab colours, whereas small animals can have more vivid colours. Also consider colours that would be good for camouflage.
Dinosaurs that are known to have lived within different time periods and geographic ranges should not be restored as if living together. Likewise, plants and other environmental features present in the restoration should match fossil evidence. For example, dinosaurs from the Triassic or Jurassic should not be depicted walking on grass, which did not exist at that time.
Dinosaurs should not be depicted with external genitals, but with crocodile and birdlike cloaca.
Dinosaurs should be shown with fleshy pads underneath their feet and toes, and on their hands and fingers, these should match the pattern seen on tracks known to belong to related animals.[3]
No dinosaurs could cross the radius and ulna arm bones, making their ability to rotate their hands very limited/impossible.[4]
Be sure that quadrupedal dinosaurs are shown with their legs in the right order.[5]
Most dinosaurs probably retained a simplified and immobile tongue as in most archosaurs, with possible exceptions being birds and derived quadrupedal herbivorous dinosaurs like Hadrosauroids and Ankylosaurids.[6]

The digits of their hands were arranged in a columnar, sauropod-like fashion.[11]
The tail spikes of stegosaurs were directed sideways and almost horizontally, not upright.

Guidelines for
ornithopods

The three central fingers of
hadrosaurs
should be encased in a single hooflike sheath.
Hadrosaurs had very inflexible tails, stiffened by bony tendons, so the tails could only be moved slightly to the sides, but not up and down.
Skin impressions as well as "mummies" have been found of hadrosaurs; use these as reference when restoring the skin of hadrosaurs and related ornithopods.
Ornithopods could not
pronate their hands, but the palms of hadrosaurs faced almost backwards..[12]

Guidelines for
ceratopsians

Ceratopsians may be restored with bristles, as the primitive ceratopsian Psittacosaurus has been shown to have such structures.
They have five fingers on their hands. Only the inner three should be shown with claws.[13]
Ceratopsians could not pronate their hands.[14]

Most wanted illustrations

Need life restoraton: Nebulasaurus, Dinheirosaurus, Chuanjiesaurus, Struthiosaurus, Mendozasaurus, Magyarosaurus, Savannasaurus, Powellvenator, Xunmenglong
Need size diagrams: Sinocalliopteryx
The Unidentified Dinosauria category on Commons is filled with potentially useful images that need to be identified.

To do list for User:ArthurWeasley

Agustinia Mussaurus Abelisaurus

Majungasaurus - need a couple more pictures for this article, maybe a headshot and a full-body image? Anything would be great! [15][16]
Allosaurus: a head shot restoration would be nice (maybe an "A. atrox" versus A. fragilis comparison).
If anyone feels up to it, a picture of Acro's skull as I think it is pretty cool looking (PDF here).

Images under review

Anatotitan

Kritosaurus

Done

Acrocanthosaurus Agilisaurus Allosaurus Amargasaurus Arrhinoceratops Baryonyx Brachytrachelopan Carcharodontosaurus Chirostenotes Compsognathus Corythosaurus Dilophosaurus Diplodocus Diplodocus head series Dromaeosaurus Dromiceiomimus Einiosaurus Eocursor Erlikosaurus Fukuiraptor Giganotosaurus Gigantoraptor Gorgosaurus Gryposaurus Herrerasaurus Heterodontosaurus Hypsilophodon Iguanodon Jeholornis Kentrosaurus Lagosuchus Lambeosaurus head series Liliensternus Mapusaurus Masiakasaurus Mononykus Olorotitan Ornitholestes Orodromeus

Othnielosaurus

Ouranosaurus Pachycephalosaurus Paralititan Protoceratops Psittacosaurus head series Rhabdodon Scelidosaurus Scutellosaurus Segisaurus Sellosaurus
Shunosaurus Stenopelix Suchomimus Tenontosaurus Thecodontosaurus Thescelosaurus Torvosaurus Tsintaosaurus Tuojiangosaurus Yunnanosaurus