PBDB Taxon

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Stenonyx

Reptilia - Anchisauripodidae

Taxonomy

Stenonyx was named by Lull (1904). It is considered to be a form taxon.

It was assigned to Theropoda by Lull (1917); to Grallatoridae by Lull (1904), Lull (1915) and Lull (1953); to Coelurosauria by Kuhn (1958); to Anchisauripodidae by Kuhn (1963), Haubold (1969), Haubold (1971) and Haubold (1974); and to Theropoda by Romero Molina et al. (2003).

Synonyms

Leptonyx was named by Hitchcock (1865). It is considered to be a form taxon.

It was replaced with Stenonyx by Lull (1904), Lull (1915), Hay (1930), Kuhn (1958) and Haubold (1971).

It was assigned to Aves by Hitchcock (1898).

Synonymy list

Year	Name and author
1865	Leptonyx Hitchcock p. 8
1898	Leptonyx Hitchcock p. 401
1904	Stenonyx Lull p. 498
1915	Stenonyx Lull p. 205
1917	Stenonyx Lull p. 117
1953	Stenonyx Lull p. 159
1958	Stenonyx Kuhn p. 22
1963	Stenonyx Kuhn p. 79
1969	Stenonyx Haubold p. 99
1971	Stenonyx Haubold p. 68
1974	Stenonyx Haubold p. 43
2003	Stenonyx Romero Molina et al. p. 24

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida

Rank	Name	Author
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Theropoda	()
family	Anchisauripodidae
genus	Stenonyx

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. †Stenonyx Lull 1904

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Invalid names: Leptonyx Hitchcock 1865 [replaced]

Diagnosis

Reference	Diagnosis
R. S. Lull 1904	Bipedal, tridactyl, digitigrade track, very minute. With thick toes and long slender claws and distinct phalangeal pads. Length of limb unknown as the genus is known only from two isolated tracks. There is no tail trace.

Measurements

No measurements are available

Composition:

hydroxyapatiteo

Entire body:

yeso

Adult length:

10 to < 100o

Adult width:

1.0 to < 10o

Adult height:

1.0 to < 10o

Architecture:

compact or denseo

Ontogeny:

accretion, modification of partso

Grouping:

solitaryo

Environment:

terrestrialo

Locomotion:

actively mobileo

Life habit:

ground dwellingo

Diet:

carnivoreo

Reproduction:

oviparouso

Dispersal:

direct/internalo

Dispersal 2:

mobileo

Created:

2004-12-14 12:50:08

Modified:

2004-12-14 14:50:08

Source: o = order

Reference: Marsh 1875

Age range: base of the Late/Upper Hettangian to the top of the Early/Lower Pliensbachian or 201.30000 to 183.00000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Hettangian	201.3 - 196.5	Poland (Swietokrzyskie)	S. sp. (83229)
Late/Upper Hettangian	201.3 - 196.5	Poland (Swietokrzyskie)	S. sp. (28334)
Early/Lower Pliensbachian	189.6 - 183.0	Denmark (Bornholm)	S. sp. (223749)