PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Sinornithosaurus millenii

Reptilia - Dromaeosauridae

Taxonomy

Sinornithosaurus millenii was named by Xu et al. (1999). Its type specimen is IVPP V.12811, a skeleton, and it is a compression preserving soft parts. Its type locality is Sihetun, lower Yixian (general), which is in a Barremian/Aptian lacustrine shale/siltstone in the Yixian Formation of China.

Synonyms

Sinornithosaurus haoiana was named by Liu et al. (2004). Its type specimen is D2140, a skeleton, and it is a compression fossil. Its type locality is Baicaigou, Toutai, which is in a Barremian/Aptian lacustrine shale/mudstone in the Yixian Formation of China.

It was synonymized subjectively with Sinornithosaurus millenii by Turner et al. (2012).

Synonymy list

Year	Name and author
1999	Sinornithosaurus millenii Xu et al. p. 262
2000	Sinornithosaurus millenii Burnham et al. p. 8
2001	Sinornithosaurus millenii Xu and Wu pp. 1740-1750 figs. 1-6
2003	Sinornithosaurus millenii Currie p. 56
2003	Sinornithosaurus millenii Rauhut p. 37
2003	Sinornithosaurus milleni Ruiz-Omeñaca and Canudo p. 296
2004	Sinornithosaurus haoiana Liu et al. pp. 778-779 figs. 1, Pl. 1
2004	Sinornithosaurus millenii Liu et al. p. 778
2004	Sinornithosaurus millenii Norell and Hwang p. 8
2004	Sinornithosaurus millenii Norell and Makovicky p. 198
2004	Sinornithosaurus millenii Senter et al. p. 5
2007	Sinornithosaurus millenii Turner et al. p. 3
2008	Sinornithosaurus millenii Godefroit et al. p. 432
2009	Sinornithosaurus millennii Longrich and Currie
2009	Sinornithosaurus haoiana Zheng et al.
2009	Sinornithosaurus millenii Zheng et al.
2009	Sinornithosaurus millenii van der Lubbe et al. p. 405
2010	Sinornithosaurus millenii Amiot et al. p. 351
2011	Sinornithosaurus millenii Gianechini et al. p. 285
2011	Sinornithosaurus millenii Goianechini and Apesteguía p. 174
2011	Sinornithosaurus millenii Turner et al. p. 8
2012	Sinornithosaurus haoiana Dececchi et al. p. 134
2012	Sinornithosaurus millenii Gong et al. p. 82
2012	Sinornithosaurus millenii Prieto-Marquez et al. p. 120
2012	Sinornithosaurus haoiana Xing et al. p. 503
2012	Sinornithosaurus millenii Xing et al. p. 503
2015	Sinornithosaurus millenii Parsons and Parsons p. 21
2018	Sinornithosaurus millenii Xing et al. p. 53
2021	Sinornithosaurus millenii Averianov and Lopatin p. 570

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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
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()

Rank	Name	Author
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Theropoda	()
—	Neotheropoda
—	Averostra	Paul 2002
—	Tetanurae
—	Coelurosauria	()
—	Maniraptora
—	Paraves
infraorder	Deinonychosauria
family	Dromaeosauridae
subfamily	Microraptorinae	()
genus	Sinornithosaurus
species	millenii

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.

†Sinornithosaurus millenii Xu et al. 1999

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Invalid names: Sinornithosaurus haoiana Liu et al. 2004 [synonym]

Diagnosis

Reference	Diagnosis
J. Liu et al. 2004 (Sinornithosaurus haoiana)	It can be distinguished from S. millenii in that: (1) the main body of the premaxilla is higher, its length being slightly longer than its height; (2) the anterior margin of the premaxilla is vertical; (3) the maxillary process of the premaxilla is very lon; (4) the maxilla is separated from external naris; (5) maxillary fenestra is circular and relatively small; (6) the ascending process ofquadratojugal is remarkably longer than the jugal process; (7) the ratio of the dentary length/height is distinctly small; and (8) the pubic peduncle of ilium is longitudinally narrower than acetabulum and so on.

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:

terrestrialf

Locomotion:

actively mobileo

Life habit:

ground dwellingf

Diet:

carnivoref

Reproduction:

oviparousf

Dispersal:

direct/internalo

Dispersal 2:

mobileo

Created:

2005-09-11 17:04:18

Modified:

2005-09-11 19:04:18

Source: f = family, o = order

References: Holtz et al. 2000, Marsh 1875

Age range: base of the Late/Upper Barremian to the top of the Early/Lower Aptian or 125.77000 to 119.57000 Ma

Collections (2 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Barremian - Early/Lower Aptian	125.77 - 119.57	China (Liaoning)	Sinornithosaurus haoiana (67611) Sinornithosaurus millenii (type locality: 52888)