
Tambatitanis (meaning "Tamba giant", after Tamba, the name given to the northwest of Kansai, Japan) is an extinct genus of titanosauriform, possibly titanosaurian, sauropod dinosaur from the Early Cretaceous-aged (early Albian) Ohyamashimo Formation of the Sasayama Group. It is known from a single species, Tambatitanis amicitiae, known from a partial skeleton.
Tambatitanis (meaning "Tamba giant", after Tamba, the name given to the northwest of Kansai, Japan) is an extinct genus of titanosauriform, possibly titanosaurian, sauropod dinosaur from the Early Cretaceous-aged (early Albian) Ohyamashimo Formation of the Sasayama Group. It is known from a single species, Tambatitanis amicitiae, known from a partial skeleton.
== Discovery and naming == thumb|left|upright|Dentary The holotype specimen of the Tambaitanis, MNHAH D-1029280 was initially discovered in August 2006, by Shigeru Murakami and Kiyoshi Adachi in the reddish mudstone bed of the Ohyamashimo Formation (Lower Formation of the Sasayama Group) on a riverbed of the Sasayama RIver in Kamitaki, Sannan-Cho, Tamba-Sasayama city, of Hyōgo Prefecture, Japan. It took five field seasons, from 2006 to 2010 to excavate a fossil because access to the skeleton was only available during the winter when the water level of the river becomes lowest. It was originally called 'Tamba-Ryu' before the publication in 2014. The specimen is somewhat semi-articulated and includes teeth, a braincase, a dentary, an atlas, a fragmental cervical vertebra, dorsal ribs, two fragmental dorsal vertebrae, a pubis, an ilium, sacral spines, presumable first sacral ribs, 22 caudal vertebrae, and 17 chevrons.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).