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Segisaurus halli ✝

Description

Segisaurus (meaning "Segi canyon lizard") is a genus of small coelophysoid theropod dinosaur, that measured approximately 1 metre (3.3 feet) in length. The only known specimen was discovered in early Jurassic strata in Tsegi Canyon, Arizona, for which it was named. Segisaurus is the only dinosaur to have ever been excavated from the area.


From Wikipedia article at https://en.wikipedia.org/wiki/Segisaurus_halli, which is released under the Creative Commons Attribution-Share-Alike License 3.0.
Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)4967126https://www.gbif.org/species/4967126
PaleoBioDB ID (PBDB)55543https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=55543
Rankspecies
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Dinosauria : Segisaurus : Segisaurus halli
Taxonomy (PBDB)Life : Animalia : Chordata : Saurischia : Segisaurus : Segisaurus halli
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SauropsidaHuxley 1864
classReptiliaLaurenti 1768
subclassEureptilia
-RomeriidaGauthier et al. 1988
-Diapsida
-Eosuchia
-NeodiapsidaBenton 1985
-SauriaGauthier 1984
-Archosauromorpha
-CrocopodaEzcurra 2016
-ArchosauriformesGauthier 1986
-EucrocopodaEzcurra 2016
-Archosauria
informalAvemetatarsaliaBenton 1999
-OrnithodiraGauthier 1986
-DinosauromorphaBenton 1985
-DinosauriformesNovas 1992
-Dinosauria
-Saurischia
-Theropoda
-NeotheropodaBakker 1986
superfamilyCoelophysoideaHoltz 1994
genusSegisaurusCamp 1936
speciesSegisaurus halliCamp 1936
Generic NameSegisaurus
Scientific NameSegisaurus halli Camp, 1936
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Segisaurus hallispeciesbelongs to Segisaurusstated without evidenceCamp, 1936
Segisaurus hallispeciesbelongs to Segisaurusstated with evidenceBonaparte, 1978
Segisaurus hallispeciesnomen dubium Segisaurusstated with evidenceOstrom, 1981
Segisaurus hallispeciesbelongs to Segisaurusstated without evidenceWelles, 1984
Segisaurus hallispeciesbelongs to Segisaurusstated with evidenceRowe and Gauthier, 1990
Segisaurus hallispeciesbelongs to Segisaurusstated without evidenceSereno and Wild, 1992
Segisaurus hallispeciesbelongs to Segisaurusstated with evidenceTykoski and Rowe, 2004
Segisaurus hallispeciesbelongs to Segisaurusstated without evidenceIrmis, 2005
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance191 - 174 Ma
Jurassic
Last Recorded Appearance191 - 174 Ma
Jurassic
Environmentterrestrial (based on Theropoda)
Motilityactively mobile (based on Theropoda)
Dietcarnivore (based on Theropoda)
Reproductionoviparous, dispersal=direct/internal,mobile (based on Theropoda)
Ontogenyaccretion,modification of parts (based on Theropoda)
Taphonomyhydroxylapatite,compact or dense (based on Theropoda)
Primary Reference (PBDB)C. L. Camp. 1936. A new type of bipedal dinosaur from the Navajo Sandstone of Arizona. University of California Publications in Geological Sciences 24(2):39-56
Wikipediahttps://en.wikipedia.org/wiki/Segisaurus_halli

Fossil Distribution

Synonymy List

YearName and Author
1936Segisaurus halli Camp
1950Segisaurus halli Gregory p. 76
1970Segisaurus halli Steel p. 12
1978Segisaurus halli Bonaparte p. 321
1984Segisaurus halli Welles p. 174
1986Segisaurus halli Gauthier p. 9
1988Segisaurus halli Paul p. 295
1989Segisaurus halli Rowe p. 125
1990Segisaurus halli Rowe and Gauthier p. 152
1992Segisaurus halli Sereno and Wild p. 435
YearName and Author
1997Segisaurus halli Rowe et al. p. 108
2003Segisaurus halli Rauhut p. 19
2004Segisaurus halli Tykoski and Rowe p. 48
2005Segisaurus halli Carrano et al. p. 835
2005Segisaurus halli Irmis pp. 61-63
2005Segisaurus halli Yates p. 107
2007Segisaurus halli Nesbitt et al. p. 235
2010Segisaurus halli Langer et al. p. 91
2016Segisaurus halli Martill et al. p. 21
2018Segisaurus halli Dal Sasso et al. p. 30

References

Camp C. L. (1936) A new type of bipedal dinosaur from the Navajo Sandstone of Arizona, University of California Publications in Geological Sciences 24 2, 39-56
Gregory H. E. (1950) Geology and geography of the Zion Park region, Utah and Arizona, United States Geological Survey Professional Paper 220, vi-200
Steel R. (1970) Part 14. Saurischia, Handbuch der Paläoherpetologie/Encyclopedia of Paleoherpetology. Gustav Fischer Verlag, Stuttgart, 1-87
Bonaparte J. F. (1978) El Mesozoico de America de Sur y sus Tetrapodos [The Mesozoic of South America and its tetrapods], Opera Lilloana 26, 1-596
Welles S. P. (1984) Dilophosaurus wetherilli (Dinosauria, Theropoda): osteology and comparisons, Palaeontographica Abteilung A 185, 85-180
Gauthier J. A. (1986) Saurischian monophyly and the origin of birds, The Origin of Birds and the Evolution of Flight, K. Padian (ed.), Memoirs of the California Academy of Sciences 8, 1-55
Paul G. S. (1988) , Predatory Dinosaurs of the World. Simon & Schuster, New York, 1-464
Rowe T. (1989) A new species of the theropod dinosaur Syntarsus from the Early Jurassic Kayenta Formation of Arizona, Journal of Vertebrate Paleontology 9 2, 125-136
Rowe T., Gauthier J. (1990) Ceratosauria, The Dinosauria. University of California Press, Berkeley, 151-168
Sereno P. C., Wild R. (1992) Procompsognathus: theropod, "thecodont" or both?, Journal of Vertebrate Paleontology 12 4, 435-458
Rauhut O. W. M. (2003) The interrelationships and evolution of basal theropod dinosaurs, Special Papers in Palaeontology 69, 1-213
Tykoski R. S., Rowe T. E. (2004) Ceratosauria, The Dinosauria (second edition). University of California Press, Berkeley, 47-70
Carrano M. T., Hutchinson J. R., et al (2005) New information on Segisaurus halli, a small theropod dinosaur from the Early Jurassic of Arizona, Journal of Vertebrate Paleontology 25 4, 835-849
Irmis R. B. (2005) A review of the vertebrate fauna of the Lower Jurassic Navajo Sandstone in Arizona, In R. D. McCord (ed.), Vertebrate Paleontolgy of Arizona. Mesa Southwest Museum Bulletin 11, 55-71
Yates A. M. (2005) A new theropod dinosaur from the Early Jurassic of South Africa and its implications for the early evolution of theropods, Palaeontologia Africana 41, 105-122
Nesbitt S. J., Irmis R. B., et al (2007) A critical re-evaluation of the Late Triassic dinosaur taxa of North America, Journal of Systematic Palaeontology 5 2, 209-243
Langer M. C., Ezcurra M. D., et al (2010) The origin and early evolution of dinosaurs, Biological Reviews 85, 55-110 doi:10.1111/j.1469-185X.2009.00094.x
Martill D. M., Vidovic S. U., et al (2016) The oldest Jurassic dinosaur: a basal neotheropod from the Hettangian of Great Britain, PLoS ONE 11 1, e0145713:1-38 doi:10.1371/journal.pone.0145713
Dal Sasso C., Maganuco S., et al (2018) The oldest ceratosaurian (Dinosauria: Theropoda), from the Lower Jurassic of Italy, sheds light on the evolution of the three-fingered hand of birds, PeerJ 6, e5976:1-78 doi:10.7717/peerj.5976
M. T. Carrano, J. R. Hutchinson, S. D. Sampson (2005) New information on Segisaurus halli, a small theropod dinosaur from the Early Jurassic of Arizona: Journal of Vertebrate Paleontology 4: 835--849 - via Catalogue of Life
C. L. Camp (1936) A new type of bipedal dinosaur from the Navajo Sandstone of Arizona: University of California Publications in Geological Sciences 2: 39--56 - via Catalogue of Life
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
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