Hamititan

Genus of titanosaur

Hamititan

Temporal range: Early Cretaceous, 120 Ma

PreꞒ

Skeletal diagram showing known material
Scientific classification
Domain:  | Eukaryota
Kingdom:  | Animalia
Phylum:  | Chordata
Clade:  | Dinosauria
Clade:  | Saurischia
Clade:  | †Sauropodomorpha
Clade:  | †Sauropoda
Clade:  | †Macronaria
Clade:  | †Titanosauria
Genus:  | †Hamititan
Wang et al., 2021
Type species
†Hamititan xinjiangensis

Wang et al., 2021

Hamititan (meaning "Hami giant") is a genus of titanosaur sauropod dinosaur from the Shengjinkou Formation of Xinjiang, China. It contains one species, the type species, Hamititan xinjiangensis.[1]

## Discovery and naming[edit]

In 2006, a Konservat-Lagerstätte was reported from the Shengjinkou Formation in the Hami region of Xinjiang, China. This consisted of lake sediments allowing for exceptional preservation of fossils. The same year, Qiu Zhanxiang and Wang Banyue started official excavations.

Among the excavated fossils were seven caudal vertebrae with three chevrons preserved. These were established as the holotype (HM V22) of the new sauropod taxon, Hamititan. Four sacral elements, specimen IVPP V27875, were not referred. A theropod tooth was found near the sixth caudal vertebra of the holotype. It is likely that this theropod preyed on the holotype shortly after it died. The generic name refers to the city of Hami, where the holotype was found, while the specific name, xinjiangensis, refers to the Chinese province, Xinjiang.[1]

## Classification[edit]

The phylogenetic analysis of Wang et al. places Hamititan as a derived non-lithostrotian titanosaur in a polytomy with Epachthosaurus, Kaijutitan, Notocolossus, rinconsaurs, lognkosaurs, and lithostrotians. If it is scored with the contemporary Silutitan as a single taxon, the combined taxon will be sister to Euhelopus. A cladogram depicting the former hypothesis is shown below:[1]

Titanosauria |  |  |  |  |

Andesaurus

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Wintonotitan

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Malarguesaurus

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Epachthosaurus

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Hamititan

Kaijutitan

Notocolossus

Rinconsauria

Lognkosauria

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Dreadnoughtus

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Lithostrotia

## Paleobiology[edit]

Other animals from the holotype locality include the pterosaur Hamipterus and contemporary euhelopodid Silutitan, which is described in the same paper. Together, Hamititan, the aforementioned fauna and an unnamed theropod represent the known vertebrate taxa of the area.[1]

## References[edit]

1. ^ a b c d Wang X, Bandeira KL, Qiu R, Jiang S, Cheng X, Ma Y, Kellner AW (2021). "The first dinosaurs from the Early Cretaceous Hami Pterosaur Fauna, China". Scientific Reports. 11 (1): Article number 14962. Bibcode:2021NatSR..1114962W. doi:10.1038/s41598-021-94273-7. PMC 8361124. PMID 34385481.

Taxon identifiers|

* Wikidata: Q108068415
* Fossilworks: 440882

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Sauropodomorpha

* Kingdom: Animalia
* Phylum: Chordata
* Class: Sauropsida
* Clade: Avemetatarsalia
* Clade: Dinosauria

| Avemetatarsalia|

*     * see Avemetatarsalia

Sauropodomorpha|

*     * see below↓

Sauropodomorpha

Sauropodomorpha

* Buriolestes
* Eoraptor
* Gigantoscelus
* Guaibasaurus
* Mbiresaurus
* Pampadromaeus
* Panphagia

Saturnaliidae|

* Buriolestes?
* Eoraptor?
* Chromogisaurus
* Nhandumirim
* Pampadromaeus?
* Panphagia?
* Saturnalia

Bagualosauria

* Arcusaurus
* Asylosaurus
* Bagualosaurus
* Efraasia
* Nambalia
* Pantydraco
* Thecodontosaurus

Unaysauridae|

* Jaklapallisaurus
* Macrocollum
* Unaysaurus

Plateosauria

* Plateosauravus
* Ruehleia
* Xixiposaurus

| Plateosauridae|

* Euskelosaurus
* Gresslyosaurus
* Issi
* Pachysauriscus
* Plateosaurus
* Yimenosaurus

|

Massopoda

* Gryponyx
* Gyposaurus
* Kholumolumo
* Ignavusaurus
* Sarahsaurus
* Tuebingosaurus

Riojasauridae|

* Eucnemesaurus
* Riojasaurus

Massospondylidae|

* Adeopapposaurus
* Coloradisaurus
* Glacialisaurus
* Ignavusaurus?
* Leyesaurus
* Lufengosaurus
* Massospondylus
* Ngwevu
* Pradhania
* Sarahsaurus
* Xingxiulong?

Sauropodiformes|

* Chuxiongosaurus?
* Jingshanosaurus
* Qianlong
* Seitaad
* Xingxiulong?
* Yizhousaurus
* Yunnanosaurus

Anchisauria|

* Aardonyx
* Anchisaurus
* Camelotia
* Irisosaurus
* Lamplughsaura
* Leonerasaurus
* Melanorosaurus
* Meroktenos
* Mussaurus
* Pulanesaura
* Sefapanosaurus

Sauropoda|

*     * see below↓

Sauropoda

Sauropoda

* Amygdalodon
* Blikanasaurus
* Chinshakiangosaurus
* Gongxianosaurus
* Isanosaurus
* Leonerasaurus?
* Pulanesaura?
* Protognathosaurus
* Schleitheimia
* Tuebingosaurus?

Lessemsauridae|

* Antetonitrus
* Ingentia
* Ledumahadi
* Lessemsaurus

Gravisauria

* Archaeodontosaurus?
* Kotasaurus
* Ohmdenosaurus
* Rhoetosaurus
* Sanpasaurus?
* Zizhongosaurus?

Vulcanodontidae|

* Tazoudasaurus
* Vulcanodon

Eusauropoda

* Algoasaurus
* Asiatosaurus
* Bagualia
* Barapasaurus
* Bellusaurus
* Cetiosauriscus
* Dashanpusaurus
* Dystrophaeus
* Janenschia
* Jobaria
* Nebulasaurus
* Perijasaurus
* Shunosaurus
* Spinophorosaurus
* Tehuelchesaurus
* Volkheimeria

Cetiosauridae|

* Cetiosaurus
* Chebsaurus
* Ferganasaurus?
* Lapparentosaurus?
* Patagosaurus?

Mamenchisauridae|

* Analong
* Anhuilong
* Cetiosauriscus?
* Chuanjiesaurus
* Datousaurus?
* Eomamenchisaurus
* Huangshanlong
* Hudiesaurus
* Klamelisaurus?
* Mamenchisaurus
* Omeisaurus
* Qijianglong
* Rhomaleopakhus
* Tienshanosaurus
* Tonganosaurus
* Wamweracaudia
* Xinjiangtitan
* Yuanmousaurus
* Zigongosaurus

Turiasauria|

* Amanzia
* Bellusaurus?
* Haestasaurus?
* Janenschia?
* Losillasaurus
* Mierasaurus
* Moabosaurus
* Narindasaurus
* Oplosaurus?
* Tehuelchesaurus?
* Tendaguria
* Turiasaurus
* Zby

Neosauropoda|

| Diplodocoidea|

* (see below ↓ )

|

Macronaria|

* (see below ↓ )

| Dubious sauropods|

* Bothriospondylus
* Cardiodon
* Dinodocus
* Gigantosaurus
* Neosodon
* Qinlingosaurus
* Ultrasaurus

|

Diplodocoidea

Diplodocoidea

* Haplocanthosaurus

Diplodocimorpha

| Rebbachisauridae|

* Agustinia
* Amazonsaurus
* Comahuesaurus
* Dzharatitanis?
* Histriasaurus
* Lavocatisaurus
* Maraapunisaurus?
* Sidersaura
* Xenoposeidon
* Zapalasaurus

Khebbashia|

| Limaysaurinae|

* Cathartesaura
* Limaysaurus
* Nopcsaspondylus?
* Rayososaurus?

|

Rebbachisaurinae|

* Demandasaurus
* Itapeuasaurus
* Katepensaurus
* Nigersaurus
* Rebbachisaurus
* Tataouinea

Flagellicaudata|

| Dicraeosauridae|

* Amargasaurus
* Amargatitanis
* Bajadasaurus
* Brachytrachelopan
* Dicraeosaurus
* Dyslocosaurus?
* Kaatedocus
* Lingwulong
* Pilmatueia
* Smitanosaurus
* Suuwassea
* Tharosaurus

|

Diplodocidae|

| Apatosaurinae|

* Amphicoelias?
* Apatosaurus
* Atlantosaurus?
* Brontosaurus

|

Diplodocinae|

* Barosaurus
* Dinheirosaurus
* Diplodocus
* Galeamopus
* Kaatedocus?
* Leinkupal
* Supersaurus
* Tornieria

Macronaria

Macronaria

* Abrosaurus
* Aragosaurus
* Bashunosaurus?
* Daanosaurus
* Dashanpusaurus?
* Europasaurus
* Haestasaurus?
* Yuzhoulong

Camarasauridae|

* Camarasaurus
* Lourinhasaurus

Titanosauriformes

* Astrodon
* Duriatitan
* Eucamerotus
* Fushanosaurus
* Fusuisaurus
* Ornithopsis
* Pelorosaurus
* Rugocaudia?

Brachiosauridae|

* Abydosaurus
* Atlasaurus
* Brachiosaurus
* Cedarosaurus
* Galvesaurus?
* Giraffatitan
* Lusotitan
* Sonorasaurus
* Soriatitan
* Venenosaurus
* Vouivria

Somphospondyli|

* Angolatitan
* Arkharavia
* Astrophocaudia
* Austrosaurus
* Brohisaurus
* Brontomerus
* Chubutisaurus
* Dongbeititan
* Europatitan
* Fukuititan
* Garumbatitan
* Jiutaisaurus
* Liaoningotitan
* Ligabuesaurus?
* Liubangosaurus
* Oceanotitan
* Padillasaurus
* Pukyongosaurus
* Ruixinia
* Sauroposeidon
* Sibirotitan
* Tastavinsaurus
* Triunfosaurus
* Wintonotitan?

Euhelopodidae|

* Australodocus?
* Chiayusaurus?
* Erketu
* Euhelopus
* Gannansaurus
* Gobititan
* Huabeisaurus
* Huanghetitan
* Jiangshanosaurus?
* Phuwiangosaurus
* Qiaowanlong
* Silutitan
* Tambatitanis
* Tangvayosaurus
* Yongjinglong
* Yunmenglong

Titanosauria|

*     * see below↓

Titanosauria

Titanosauria

* Abdarainurus
* Aegyptosaurus?
* Andesaurus
* Angolatitan?
* Arackar
* Argyrosaurus
* Atacamatitan
* Austroposeidon
* Baotianmansaurus
* Barrosasaurus
* Baurutitan?
* Bonatitan?
* Borealosaurus
* Brasilotitan
* Bustingorrytitan
* Choconsaurus
* Daxiatitan
* Dongyangosaurus
* Dreadnoughtus?
* Elaltitan
* Epachthosaurus?
* Gandititan
* Hamititan
* Huabeisaurus
* Jiangshanosaurus?
* Kaijutitan
* Karongasaurus
* Laplatasaurus
* Ligabuesaurus?
* Magyarosaurus
* Malarguesaurus?
* Malawisaurus
* Mnyamawamtuka
* Narambuenatitan
* Ninjatitan
* Normanniasaurus
* Nullotitan
* Pellegrinisaurus?
* Petrobrasaurus
* Pitekunsaurus
* Rapetosaurus
* Rukwatitan
* Ruyangosaurus
* Tastavinsaurus?
* Tengrisaurus?
* Traukutitan
* Trigonosaurus
* Sonidosaurus
* Uberabatitan
* Volgatitan
* Wintonotitan?
* Xianshanosaurus

Diamantinasauria|

* Australotitan
* Diamantinasaurus
* Sarmientosaurus
* Savannasaurus

Lirainosaurinae|

* Ampelosaurus
* Atsinganosaurus
* Garrigatitan
* Lirainosaurus
* Lohuecotitan
* Mansourasaurus
* Paludititan

Eutitanosauria

* Inawentu
* Menucocelsior

Colossosauria|

* Antarctosaurus
* Baalsaurus
* Bonitasaura
* Chucarosaurus
* Epachthosaurus?
* Jainosaurus
* Quetecsaurus
* Tengrisaurus?
* Vahiny

Rinconsauria|

* Adamantisaurus
* Maxakalisaurus?
* Muyelensaurus
* Overosaurus
* Panamericansaurus
* Rinconsaurus

Aeolosaurini|

* Aeolosaurus
* Arrudatitan
* Bravasaurus
* Caieiria
* Gondwanatitan
* Punatitan
* Shingopana

Lognkosauria|

* Argentinosaurus
* Drusilasaura
* Dzharatitanis?
* Futalognkosaurus
* Jiangxititan
* Mendozasaurus
* Notocolossus
* Patagotitan
* Puertasaurus

Saltasauroidea|

| Nemegtosauridae|

* Nemegtosaurus
* Quaesitosaurus?
* Tapuiasaurus?

|

Saltasauridae|

* Igai
* Isisaurus?
* Qingxiusaurus
* Quaesitosaurus?

Opisthocoelicaudiinae|

* Alamosaurus
* Baurutitan?
* Dreadnoughtus?
* Opisthocoelicaudia
* Pellegrinisaurus?
* Zhuchengtitan?

Saltasaurinae|

* Abditosaurus
* Bonatitan?
* Ibirania
* Maxakalisaurus?
* Neuquensaurus
* Paralititan
* Rocasaurus
* Saltasaurus
* Yamanasaurus

| Dubious titanosaurs|

* Bruhathkayosaurus?
* Campylodoniscus
* Clasmodosaurus
* Hypselosaurus
* Iuticosaurus
* Loricosaurus
* Macrurosaurus?
* Microcoelus
* Mongolosaurus?
* Titanosaurus

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Topics in sauropodomorph research

* Sauropod neck posture
* Sauropod hiatus
* List of sauropod species

This Sauropodomorph-related article is a stub. You can help Wikipedia by expanding it.

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