PBDB Taxon

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Sillimanius

Osteichthyes

Taxonomy

Sillimanius was named by Hitchcock (1845). It is considered to be a form taxon.

It was assigned to Tetradactylidae by Hitchcock (1845); to Dinosauria by Lull (1904); to Dinosauria by Kuhn (1958); and to Reptilia by Lull (1917), Kuhn (1963).

Species

Ornithopus adamsanus, Ornithopus fabrei, Ornithopus rectus, S. gracilior, S. tetradactylus (syn. Ornithopus gallinaceus)

Entered

by M. Carrano on 2006-04-24; modified by M. Carrano on 2022-12-14

Synonyms

Ornithopus was named by Hitchcock (1845). It is considered to be a form taxon.

It was synonymized subjectively with Sillimanius by Hay (1902), Lull (1904), Kuhn (1958).

It was assigned to Aves by Hitchcock (1848); to Leptodactyli by Quenstedt (1882); and to Dinosauria by Hitchcock (1898).

Synonymy list

Year	Name and author
1845	Ornithopus Hitchcock
1845	Sillimanius Hitchcock p. 24
1848	Ornithopus Hitchcock p. 191
1882	Ornithopus Quenstedt p. 132
1898	Ornithopus Hitchcock p. 401
1904	Sillimanius Lull p. 522
1917	Sillimanius Lull p. 121
1958	Sillimanius Kuhn p. 25
1963	Sillimanius Kuhn p. 94

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	Osteichthyes
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)

Rank	Name	Author
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
genus	Sillimanius

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.

G. †Sillimanius Hitchcock 1845

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†Sillimanius gracilior Hitchcock 1841

†Sillimanius tetradactylus Hitchcock 1836

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Invalid names: Ornithopus gallinaceus Hitchcock 1845 [synonym]

Invalid names: Ornithopus Hitchcock 1845 [synonym]

Diagnosis

Reference	Diagnosis
E. Hitchcock 1848 (Ornithopus)	Toes four; three pointing forward; the hind toe lying on the inside of the foot and on a prolongation backward of the outer toe.

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialuc

Locomotion:

actively mobilec

Life habit:

planktonicp

Diet:

suspension feederp

Created:

2017-04-17 15:15:35

Modified:

2017-04-17 15:15:35

Source: c = class, subp = subphylum, p = phylum, uc = unranked clade

References: Kiessling 2004, Bambach et al. 2007, Hendy et al. 2009, Carroll 1988

Age range: base of the Hettangian to the top of the Sinemurian or 201.40000 to 192.90000 Ma

Collections (7 total)

Time interval	Ma	Country or state	Original ID and collection number
Hettangian - Sinemurian	201.4 - 192.9	USA (Massachusetts)	Ornithopus adamsanus (52990) Ornithopus gallinaceus (52985 53028 91398) S. tetradactylus, S. gracilior, Ornithopus gracilior (52996)
Hettangian - Sinemurian	201.4 - 192.9	USA (Connecticut)	Ornithoidichnites tetradactylus, Ornithopus gallinaceus (53023) Ornithoidichnites tetradactylus, Ornithopus gallinaceus, Ornithoidichnites gracilior (53000)