Neotheropoda

Neotheropods; Temporal range: ; Late Triassic–Present, 228–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Cast of a Coelophysis bauri skeleton
	A house sparrow (Passer domesticus)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	Neotheropoda; Bakker, 1986
Subgroups
	†Liliensternus; †Notatesseraeraptor; †Shuangbaisaurus; †Szechuanosaurus?; †Tachiraptor; †Velocipes?; †Zupaysaurus; †Coelophysoidea; †Dilophosauridae; Averostra;
Synonyms
	Avepoda Paul, 2002; Eutheropoda Novas, Haro & Canale, 2003;

Neotheropoda (meaning "new theropods") is a clade that includes coelophysoids and more advanced theropod dinosaurs, and is the only group of theropods that survived the Triassic–Jurassic extinction event. All neotheropods became extinct during the early Jurassic period except for Averostra.

Classification

Neotheropoda was named by Robert T. Bakker in 1986 as a group including the relatively derived theropod subgroups Ceratosauria and Tetanurae, and excluding coelophysoids.[1] However, most later researchers have used it to denote a broader group. Neotheropoda was first defined as a clade by Paul Sereno in 1998 as Coelophysis plus modern birds, which includes almost all theropods except the most primitive species.[2]

The following family tree illustrates a synthesis of the relationships of the early theropod groups compiled by Hendrickx et al. in 2015.[3]

Tawa

Neotheropoda

	Ceratosauria

	Tetanurae

This second cladogram is based on the redescription of Dilophosaurus by Marsh and Rowe (2020).[4]

Theropoda

	Staurikosaurus

	Herrerasaurus

	Tawa

	Chindesaurus

Eodromaeus

Neotheropoda

	Lepidus

	Liliensternus

Coelophysoidea

Zupaysaurus

Cryolophosaurus

	Dilophosaurus

	Averostra

References

Bakker, R.T. 1986. The Dinosaur Heresies. William Morrow, New York. 481 pp.
Sereno, 1998. A rationale for phylogenetic definitions, with application to the higher-level taxonomy of Dinosauria. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 210, 41-83.
Hendrickx, C., Hartman, S.A., & Mateus, O. (2015). An Overview of Non- Avian Theropod Discoveries and Classification. PalArch’s Journal of Vertebrate Palaeontology, 12(1): 1-73.
Marsh, Adam D.; Rowe, Timothy B. (2020). "A comprehensive anatomical and phylogenetic evaluation of Dilophosaurus wetherilli (Dinosauria, Theropoda) with descriptions of new specimens from the Kayenta Formation of northern Arizona". Journal of Paleontology. doi:10.1017/jpa.2020.14.

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[1] Bakker, R.T. 1986. The Dinosaur Heresies. William Morrow, New York. 481 pp.

[2] Sereno, 1998. A rationale for phylogenetic definitions, with application to the higher-level taxonomy of Dinosauria. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 210, 41-83.

[theropodphylogeny2015-3] Hendrickx, C., Hartman, S.A., & Mateus, O. (2015). An Overview of Non- Avian Theropod Discoveries and Classification. PalArch’s Journal of Vertebrate Palaeontology, 12(1): 1-73.

[4] Marsh, Adam D.; Rowe, Timothy B. (2020). "A comprehensive anatomical and phylogenetic evaluation of Dilophosaurus wetherilli (Dinosauria, Theropoda) with descriptions of new specimens from the Kayenta Formation of northern Arizona". Journal of Paleontology. doi:10.1017/jpa.2020.14.