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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 misspelled as Ornithopus gracilis by Warren (1854); it was recombined as Sillimanius gracilior by Hitchcock (1845), Hay (1902), Lull (1904), Lull (1917), Hitchcock and Grier (1927), Hay (1930) and Haubold (1971).

Synonymy list
YearName and author
1841Ornithoidichnites gracilior Hitchcock p. 498
1843Ornithoidichnites gracilior Hitchcock p. 256–257
1845Sillimanius gracilior Hitchcock p. 24
1848Ornithopus gracilior Hitchcock p. 193
1854Ornithopus gracilis Warren p. 30
1871Ornithopus gracilior Hitchcock p. xxi
1889Ornithopus gracilior Hitchcock p. 118
1898Ornithopus gracilior Hitchcock p. 401
1902Sillimanius gracilior Hay p. 551
1904Sillimanius gracilior Lull p. 523
1917Sillimanius gracilior Lull p. 121
1927Sillimanius gracilior Hitchcock and Grier p. 194
1930Sillimanius gracilior Hay p. 20
1971Sillimanius gracilior Haubold p. 99

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
RankNameAuthor
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
genusSillimanius
speciesgracilior()

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.

†Sillimanius gracilior Hitchcock 1841
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Diagnosis
No diagnoses are available