Sillimanius tetradactylus Hitchcock 1836 (dinosaur)


Alternative combinations: Ornithichnites tetradactylus, Ornithoidichnites tetradactylus

Synonym: Ornithopus gallinaceus Hitchcock 1845

Full reference: E. Hitchcock. 1836. Ornithichnology - description of the foot marks of birds, (Ornithichnites) on new Red Sandstone in Massachusetts. The American Journal of Science and Arts 29(2):307-340

Belongs to Sillimanius according to R. S. Lull 1915

See also Hay 1902, Hitchcock 1836, Hitchcock 1837, Hitchcock 1837, Hitchcock 1841, Hitchcock 1844, Hitchcock 1845, Hitchcock 1848, Hitchcock 1871, Hitchcock 1889, Hitchcock 1898, Kuhn 1963, Lull 1904, Lull 1917, Miller 1879, Quenstedt 1882 and Warren 1854

Sister taxa: Sillimanius gracilior, Ornithopus rectus, Ornithopus adamsanus

Type specimens:

  • Sillimanius tetradactylus: Its type locality is Wethersfield tracksite, which is in a Hettangian/Sinemurian fluvial-lacustrine shale/sandstone in the Portland Formation of Connecticut
  • Ornithopus gallinaceus:



• Jurassic of United States (3: Connecticut, Massachusetts collections)

Total: 3 collections each including a single occurrence

Show more details

Specimen images are retrieved through the ePANDDA API.

Click image to enlarge. Click to access iDigBio record.