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Sillimanius gracilior

Reptilia -

Taxonomy
Ornithoidichnites gracilior was named by Hitchcock (1841). It is considered to be a form taxon. Its type specimen is AC 31/75, a footprint, and it is a trace fossil. Its type locality is The Cove, Wethersfield, which is in a Hettangian/Sinemurian fluvial-lacustrine shale in the Portland Formation of Connecticut.

It was recombined as Ornithopus gracilior by Hitchcock (1848), Hitchcock (1871), Hitchcock (1889) and Hitchcock (1898); it was recombined as Sillimanius gracilior by Hitchcock (1845), Lull (1904) and Lull (1917).

Synonymy list
YearName and author
1841Ornithoidichnites gracilior Hitchcock
1843Ornithoidichnites gracilior Hitchcock p. 256–257
1845Sillimanius gracilior Hitchcock p. 24
1848Ornithopus gracilior Hitchcock p. 193
1871Ornithopus gracilior Hitchcock p. xxi
1889Ornithopus gracilior Hitchcock p. 118
1898Ornithopus gracilior Hitchcock p. 401
1904Sillimanius gracilior Lull p. 523
1917Sillimanius gracilior Lull p. 121

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
RankNameAuthor
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
genusSillimanius
speciesgracilior(Hitchcock 1841)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
No diagnoses are available