Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Alvarezsauria

Reptilia

Synonymy list
YearName and author
1991Alvarezsauria Bonaparte p. 82
2012Alvarezsauria Agnolin et al. p. 35
2013Alvarezsauria Novas et al. p. 195
2018Alvarezsauria Xu et al.
2025Alvarezsauria Meso et al. p. 5

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Eugnathostomata
—Teleostomi(Bonaparte 1836)
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
RankNameAuthor
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
infraorderAlvarezsauria
infraorderAlvarezsauria

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.

Infraor. †Alvarezsauria Bonaparte 1991
show all | hide all
Unr. †Alvarezsauroidea Choiniere et al. 2010
hide
Fm. †Alvarezsauridae Bonaparte 1991
+
G. †Achillesaurus Martinelli and Vera 2007
+
†Achillesaurus manazzonei Martinelli and Vera 2007
G. †Albertonykus Longrich and Currie 2009 [Alberta claw]
+
†Albertonykus borealis Longrich and Currie 2009
G. †Alnashetri Makovicky et al. 2012
+
†Alnashetri cerropoliciensis Makovicky et al. 2012
G. †Alvarezsaurus Bonaparte 1991
+
†Alvarezsaurus calvoi Bonaparte 1991
G. †Elopteryx Andrews 1913
+
†Elopteryx nopcsai Andrews 1913
Subfm. †Parvicursorinae Karhu and Rautian 1996
+
G. †Albinykus Nesbitt et al. 2011
+
†Albinykus baatar Nesbitt et al. 2011
G. †Ceratonykus Alifanov and Barsbold 2009
+
†Ceratonykus oculatus Alifanov and Barsbold 2009
G. †Dzharaonyx Averianov and Sues 2022
+
†Dzharaonyx eski Averianov and Sues 2022
G. †Jaculinykus Kubo et al. 2023
+
†Jaculinykus yaruui Kubo et al. 2023
G. †Khulsanurus Averianov and Lopatin 2021
+
†Khulsanurus magnificus Averianov and Lopatin 2021
G. †Linhenykus Xu et al. 2011
+
†Linhenykus monodactylus Xu et al. 2011
Unr. †Mononykini Chiappe et al. 1998
+
G. †Shuuvuia Chiappe et al. 1998
G. †Mononykus Perle et al. 1993
+
†Mononykus olecranus Perle et al. 1993
Invalid names: Mononychus Perle et al. 1993 [replaced]
G. †Ondogurvel Averianov and Lopatin 2022
+
†Ondogurvel alifanovi Averianov and Lopatin 2022
G. †Parvicursor Karhu and Rautian 1996
+
†Parvicursor remotus Karhu and Rautian 1996
G. †Shuvuuia Chiappe et al. 1998
+
†Shuvuuia deserti Chiappe et al. 1998
G. †Xixianykus Xu et al. 2010
+
†Xixianykus zhangi Xu et al. 2010
Invalid names: Ceratonykini Agnolin et al. 2012 [empty]
G. †Trierarchuncus Fowler et al. 2020
+
†Trierarchuncus prairiensis Fowler et al. 2020
G. †Bannykus Xu et al. 2018
+
†Bannykus wulatensis Xu et al. 2018
G. †Bonapartenykus Agnolin et al. 2012
+
†Bonapartenykus ultimus Agnolin et al. 2012
G. †Haplocheirus Choiniere et al. 2010
+
†Haplocheirus sollers Choiniere et al. 2010
G. †Nemegtonykus Lee et al. 2019
+
†Nemegtonykus citus Lee et al. 2019
G. †Patagonykus Novas 1994
+
†Patagonykus puertai Novas 1994
G. †Qiupanykus Lü et al. 2018
+
†Qiupanykus zhangi Lü et al. 2018
G. †Tugulusaurus Dong 1973
+
†Tugulusaurus faciles Dong 1973
G. †Xiyunykus Xu et al. 2018
+
†Xiyunykus pengi Xu et al. 2018
Invalid names: Patagonykinae Agnolin et al. 2012 [empty]
G. †Aorun Choiniere et al. 2013
hide
†Aorun zhaoi Choiniere et al. 2013
Fm. †Arriagadoolithidae Agnolin et al. 2012
hide
G. †Arriagadoolithus Agnolin et al. 2012
+
†Arriagadoolithus patagoniensis Agnolin et al. 2012
G. †Shishugounykus Qin et al. 2019
hide
†Shishugounykus inexpectus Qin et al. 2019
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: Peczkis 1995, Marsh 1875, Benton 1983

Age range: base of the Callovian to the top of the Lancian or 165.30000 to 66.00000 Ma

Collections (47 total)


Time interval Ma Country or state Original ID and collection number
Callovian165.3 - 161.5China (Xinjiang) Aorun zhaoi (144354)
Oxfordian161.5 - 154.8China (Xinjiang) Haplocheirus sollers (137835) Shishugounykus inexpectus (212362)
Valanginian137.05 - 132.6China (Xinjiang) Xiyunykus pengi (203178)
Valanginian - Albian137.05 - 100.5China (Xinjiang) Tugulusaurus faciles (49047)
Aptian121.4 - 113.2China (Inner Mongolia) Bannykus wulatensis (203177)
Early/Lower Cenomanian100.5 - 93.9Argentina (Río Negro) Alnashetri cerropoliciensis (206599 225915)
Middle Turonian - Late/Upper Turonian93.9 - 89.8Uzbekistan (Navoi) Dzharaonyx eski (93204)
Late/Upper Turonian - Early/Lower Coniacian93.9 - 85.7Argentina (Neuquén) Alvarezsauridae indet., Theropoda indet. (48461)
Late/Upper Coniacian - Santonian89.8 - 83.6China (Henan) Xixianykus zhangi (94887)
Santonian85.7 - 83.6Argentina (Río Negro) Achillesaurus manazzonei (84309)
Santonian85.7 - 83.6Argentina (Neuquén) Alvarezsaurus calvoi (13305)
Santonian - Campanian85.7 - 72.2Mongolia (Dornogov) Albinykus baatar (80183)
Campanian83.6 - 72.2Mongolia (Omngov) Mononykus sp. (68525)
Campanian83.6 - 72.2China (Nei Mongol) Linhenykus monodactylus (131829 145095)
Campanian83.6 - 72.2Mongolia (Omnogov) Mononykus sp. (129749)
Late/Upper Campanian83.6 - 72.2Mongolia (Omnogov) Mononychus olecranus (51033) Mononykus olecranus (37184)
Middle Campanian - Late/Upper Campanian83.6 - 72.2Mongolia (Omnogov) Alvarezsauridae indet. (130803) Ceratonykus oculatus (88549) Jaculinykus yaruui (174155) Ondogurvel alifanovi (37004) Parvicursor remotus, Khulsanurus magnificus (27009)
Late/Upper Campanian - Early/Lower Maastrichtian83.6 - 66.0Argentina (Río Negro) Alvarezsauridae indet., Coelurosauria indet. (95694) Bonapartenykus ultimus, Theropoda indet. (28459)
Early/Lower Maastrichtian72.2 - 66.0Canada (Alberta) Albertonykus borealis (55363)
Early/Lower Maastrichtian72.2 - 66.0Romania (Hunedoara) Elopteryx nopcsai (59410 97948)
Lancian72.2 - 66.0USA (Montana) Mononykinae indet. (14616)
Late/Upper Maastrichtian72.2 - 66.0USA (South Dakota) Albertonykus sp. (224484)
Late/Upper Maastrichtian72.2 - 66.0China (Henan) Alvarezsauridae indet., Qiupanykus zhangi (203216)
Late/Upper Maastrichtian72.2 - 66.0Romania (Hunedoara) Elopteryx nopcsai (26369)
Late/Upper Maastrichtian72.2 - 66.0USA (Montana) Alvarezsauridae indet. (217034) Trierarchuncus prairiensis (217033 217035 217037 217038 217039 217041)
Maastrichtian72.2 - 66.0Mongolia (Omnogov) Alvarezsauridae indet. (55258) Mononychus olecranus (69801) Mononykus olecranus (13108) Mononykus sp. (55257 168983) Mononykus sp., Theropoda indet. (199805)