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Alvarezsauroidea

Reptilia - Theropoda

Taxonomy
Alvarezsauroidea was named by Choiniere et al. (2010) [based off Alvarezsauridae Bonaparte 1991]. Its type is Alvarezsaurus.

It was synonymized subjectively with Alvarezsauria by Agnolin et al. (2012); it was reranked as the unranked clade Alvarezsauroidea by Averianov and Lopatin (2021) and Kubo et al. (2023).

It was assigned to Coelurosauria by Xu et al. (2011); to Maniraptora by Choiniere et al. (2010) and Averianov and Lopatin (2021); and to Alvarezsauria by Kubo et al. (2023).

Synonymy list
YearName and author
2010Alvarezsauroidea Choiniere et al. pp. 571-573
2011Alvarezsauroidea Xu et al. p. 2338
2021Alvarezsauroidea Averianov and Lopatin
2023Alvarezsauroidea Kubo et al. p. 29

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
orderTheropoda
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
infraorderAlvarezsauria
—Alvarezsauroidea()
—Alvarezsauroidea()

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.

Unr. †Alvarezsauroidea Choiniere et al. 2010
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Fm. †Alvarezsauridae Bonaparte 1991
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G. †Achillesaurus Martinelli and Vera 2007
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†Achillesaurus manazzonei Martinelli and Vera 2007
G. †Albertonykus Longrich and Currie 2009 [Alberta claw]
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†Albertonykus borealis Longrich and Currie 2009
G. †Alnashetri Makovicky et al. 2012
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†Alnashetri cerropoliciensis Makovicky et al. 2012
G. †Alvarezsaurus Bonaparte 1991
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†Alvarezsaurus calvoi Bonaparte 1991
G. †Elopteryx Andrews 1913
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†Elopteryx nopcsai Andrews 1913
Subfm. †Parvicursorinae Karhu and Rautian 1996
+
G. †Albinykus Nesbitt et al. 2011
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†Albinykus baatar Nesbitt et al. 2011
G. †Ceratonykus Alifanov and Barsbold 2009
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†Ceratonykus oculatus Alifanov and Barsbold 2009
G. †Dzharaonyx Averianov and Sues 2022
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†Dzharaonyx eski Averianov and Sues 2022
G. †Jaculinykus Kubo et al. 2023
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†Jaculinykus yaruui Kubo et al. 2023
G. †Khulsanurus Averianov and Lopatin 2021
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†Khulsanurus magnificus Averianov and Lopatin 2021
G. †Linhenykus Xu et al. 2011
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†Linhenykus monodactylus Xu et al. 2011
Unr. †Mononykini Chiappe et al. 1998
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G. †Shuuvuia Chiappe et al. 1998
G. †Mononykus Perle et al. 1993
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†Mononykus olecranus Perle et al. 1993
Invalid names: Mononychus Perle et al. 1993 [replaced]
G. †Ondogurvel Averianov and Lopatin 2022
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†Ondogurvel alifanovi Averianov and Lopatin 2022
G. †Parvicursor Karhu and Rautian 1996
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†Parvicursor remotus Karhu and Rautian 1996
G. †Shuvuuia Chiappe et al. 1998
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†Shuvuuia deserti Chiappe et al. 1998
G. †Xixianykus Xu et al. 2010
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†Xixianykus zhangi Xu et al. 2010
Invalid names: Ceratonykini Agnolin et al. 2012 [empty]
G. †Trierarchuncus Fowler et al. 2020
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†Trierarchuncus prairiensis Fowler et al. 2020
G. †Bannykus Xu et al. 2018
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†Bannykus wulatensis Xu et al. 2018
G. †Bonapartenykus Agnolin et al. 2012
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†Bonapartenykus ultimus Agnolin et al. 2012
G. †Haplocheirus Choiniere et al. 2010
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†Haplocheirus sollers Choiniere et al. 2010
G. †Nemegtonykus Lee et al. 2019
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†Nemegtonykus citus Lee et al. 2019
G. †Patagonykus Novas 1994
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†Patagonykus puertai Novas 1994
G. †Qiupanykus Lü et al. 2018
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†Qiupanykus zhangi Lü et al. 2018
G. †Tugulusaurus Dong 1973
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†Tugulusaurus faciles Dong 1973
G. †Xiyunykus Xu et al. 2018
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†Xiyunykus pengi Xu et al. 2018
Invalid names: Patagonykinae Agnolin et al. 2012 [empty]
Diagnosis
No diagnoses are available
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
Maximum body mass: 10 kgg
Minimum body mass: 3 kgg
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: carnivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:39:15
Modified: 2009-01-03 22:39:15
Source: g = genus, subo = suborder, o = order
References: Benton 1983, Peczkis 1995, Marsh 1875

Age range: base of the Oxfordian to the top of the Lancian or 163.50000 to 66.00000 Ma

Collections (45 total)


Time interval Ma Country or state Original ID and collection number
Oxfordian163.5 - 157.3China (Xinjiang) Haplocheirus sollers (137835)
Barremian - Aptian129.4 - 113.0China (Xinjiang) Xiyunykus pengi (203178)
Aptian125.0 - 113.0China (Inner Mongolia) Bannykus wulatensis (203177)
Late/Upper Aptian - Albian122.46 - 100.5China (Xinjiang) Tugulusaurus faciles (49047)
Early/Lower Cenomanian99.6 - 93.5Argentina (Río Negro) Alnashetri cerropoliciensis (206599 225915)
Middle Turonian - Late/Upper Turonian93.5 - 89.3Uzbekistan (Navoi) Dzharaonyx eski (93204)
Late/Upper Turonian - Early/Lower Coniacian93.5 - 85.8Argentina (Neuquén) Alvarezsauridae indet., Theropoda indet. (48461)
Late/Upper Coniacian - Santonian89.3 - 83.6China (Henan) Xixianykus zhangi (94887)
Santonian86.3 - 83.6Argentina (Río Negro) Achillesaurus manazzonei (84309)
Santonian86.3 - 83.6Argentina (Neuquén) Alvarezsaurus calvoi (13305)
Santonian - Campanian86.3 - 72.1Mongolia (Dornogov) Albinykus baatar (80183)
Campanian83.6 - 72.1China (Nei Mongol) Linhenykus monodactylus (131829 145095)
Campanian83.6 - 72.1Mongolia (Omnogov) Mononykus sp. (129749)
Campanian83.6 - 72.1Mongolia (Omngov) Mononykus sp. (68525)
Late/Upper Campanian83.5 - 70.6Mongolia (Omnogov) Mononychus olecranus (51033)
Late/Upper Campanian83.5 - 70.6Mongolia (Omnogov Aimak) Mononykus olecranus (37184)
Middle Campanian - Late/Upper Campanian83.5 - 70.6Mongolia (Omnogov) Alvarezsauridae indet. (130803) Ceratonykus oculatus (88549) Jaculinykus yaruui (174155) Ondogurvel alifanovi (37004) Parvicursor remotus, Khulsanurus magnificus (27009)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0Argentina (Río Negro) Alvarezsauridae indet. (95694) Bonapartenykus ultimus (28459)
Maastrichtian72.1 - 66.0Mongolia (Omnogov) Alvarezsauridae indet. (55258) Mononychus olecranus (69801) Mononykus olecranus (13108) Mononykus sp. (55257 168983) Mononykus sp., Theropoda indet. (199805)
Early/Lower Maastrichtian70.6 - 66.0Canada (Alberta) Albertonykus borealis (55363)
Early/Lower Maastrichtian70.6 - 66.0Romania (Hunedoara) Elopteryx nopcsai (59410 97948)
Lancian70.6 - 66.0USA (Montana) Mononykinae indet. (14616)
Late/Upper Maastrichtian70.6 - 66.0USA (Montana) Alvarezsauridae indet. (217034) Trierarchuncus prairiensis (217033 217035 217037 217038 217039 217041)
Late/Upper Maastrichtian70.6 - 66.0Romania (Hunedoara) Elopteryx nopcsai (26369)
Late/Upper Maastrichtian70.6 - 66.0USA (South Dakota) Albertonykus sp. (224484)
Late/Upper Maastrichtian70.6 - 66.0China (Henan) Alvarezsauridae indet., Qiupanykus zhangi (203216)