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Alvarezsauridae

Reptilia - Avetheropoda - Alvarezsauridae

Synonymy list
YearName and author
1991Alvarezsauridae Bonaparte p. 82
1994Alvarezsauridae Novas
1996Alvarezsauridae Bonaparte p. 95
1996Alvarezsauridae Chiappe p. 540
1996Alvarezsauridae Chiappe et al. p. 560 fig. 2
1996Alvarezsauridae Novas p. 676 fig. 1
1997Alvarezsauridae Novas p. 141
1999Alvarezsauridae Ji et al. p. 5
1999Alvarezsauridae Sereno p. 2139 fig. 2
2000Alvarezsauridae Holtz, Jr. p. 13 fig. 5
2002Alvarezsauridae Chiappe et al. p. 90
2002Alvarezsauridae Novas and Pol pp. 122-123 fig. 5.1
2004Alvarezsauridae Padian p. 211
2006Alvarezsauridae Novas et al. p. 63
2010Alvarezsauridae Choiniere et al. p. 573 fig. 2
2012Alvarezsauridae Agnolin et al. p. 35
2012Alvarezsauridae Makovicky et al. p. 90 fig. 9

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
RankNameAuthor
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
orderAvetheropoda
suborderCoelurosauria
Maniraptora
familyAlvarezsauridae
familyAlvarezsauridae

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.

Diagnosis
ReferenceDiagnosis
L. M. Chiappe et al. 2002Laterally compressed synsacral vertebrae; concave and convex cranial and caudal articular surfaces of synsacrum, respectively; short coracoid, wider than it is tall, lacking biciptal tubercle; sternum stout and subtriangular in section; humerus with prominent, proximally projected ventral tubercle and a single condyle; ulna with a hypertrophied olecranon process and a single cotyla; large and proximally expanded radiocarpal facet of radius; hypertrophied and strongly depressed metacarpal I; robust digit I with claw bearing two proximoventral foramina; pubic pedicel cranioventrally oriented; absence of both ischiadic and pubic distal fusion; laterally compressed and kidney-shaped proximal end of pubis; cone-shaped lateral condyle of femur.
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: Kiessling 2004, Benton 1983, Peczkis 1995, Marsh 1875

Age range: base of the Early/Lower Cenomanian to the top of the Early/Lower Maastrichtian or 99.60000 to 66.00000 Ma

Collections (10 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Cenomanian99.6 - 93.5Argentina (Río Negro) Alnashetri cerropoliciensis (55364)
Late/Upper Turonian - Early/Lower Coniacian93.5 - 85.8Argentina (Neuquén) Alvarezsauridae indet., Theropoda indet. (48461)
Santonian86.3 - 83.6Argentina (Neuquén) Alvarezsaurus calvoi (13305)
Santonian86.3 - 83.6Argentina (Río Negro) Achillesaurus manazzonei (84309)
Campanian83.6 - 72.1Mongolia (Omnogov) Alvarezsauridae indet. (130803) Kol ghuva (37211)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0Argentina (Río Negro) Bonapartenykus ultimus (28459)
Middle Campanian - Early/Lower Maastrichtian83.5 - 66.0Argentina (Río Negro) Alvarezsauridae indet. (95694)
Maastrichtian72.1 - 66.0Mongolia (Omnogov) Alvarezsauridae indet. (55258)
Late/Upper Maastrichtian70.6 - 66.0Romania (Hunedoara) Elopteryx nopcsai (97948)