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Tambatitanis amicitiae

Reptilia

Taxonomy
Tambatitanis amicitiae was named by Saegusa and Ikeda (2014). Its type specimen is MNHAH D-1029280, a partial skeleton (Braincase, dentary, teeth, vertebrae and partial pelvis), and it is a 3D body fossil. Its type locality is Kamitaki Bonebed Quarry, Tamba City, which is in an Albian floodplain mudstone in the Ohyamashimo Formation of Japan.

Synonymy list
YearName and author
2014Tambatitanis amicitiae Saegusa and Ikeda p. 9 figs. 2, 4–22
2019Tambatitanis amicitiae Maisch and Matzke p. 111
2023Tambatitanis amicitiae Tatehata et al. p. 356

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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()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Saurischia()
—Sauropoda()
—Gravisauria
—Eusauropoda
—Neosauropoda
—Macronaria
—Titanosauriformes
—Somphospondyli
—Euhelopodidae()
genusTambatitanis
speciesamicitiae

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.

†Tambatitanis amicitiae Saegusa and Ikeda 2014
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Diagnosis
ReferenceDiagnosis
H. Saegusa and T. Ikeda 2014Tambatitanis amicitiae gen. et sp. nov. is characterized by 8 unique characters: (1) the postzygapophysis and the summit of the neural spine of the anterior caudal vertebrae are located beyond the posterior border of the centrum; (2) the spine of the anterior caudal vertebrae is curved strongly anteriorly and bow-shaped in lateral view; (3) the summit of the neural spine is expanded and hemispherical with its anterior face excavated by the posterodorsal extension of a deep and narrow SPRF; (4) the transverse processes of the anterior caudal vertebrae are short and L shaped; (5) the anterior chevron is longest among sauropods in proportion to body size; (6) the distal ends of the anterior chevrons are rod-shaped; (7) the distal ends of the mid chevrons are transversely thin and long anteroposteriorly, without cranial process; (8) the dorsal border of the shaft of the paroccipital process that forms the ventral margin of the posttemporal fenestra is short mediolaterally and V-shaped in posterior view.