Genus: Jaxartosaurus RIABININ, 1937
Etymology: In reference to the Jaxartes River, in Kazakhstan, near where the specimen was found and Greek, sauros, “lizard”: “Jaxartes (River) lizard”.
= Taxartosaurus RIABININ, 1939 (sic)
= Yaxartosaurus YOUNG, 1958 (sic)

Species: aralensis RIABININ, 1937
Etymology: In reference to the Aral-Caspian Desert, Central Asia, and Latin, -ensis, "place."
= Yaxartosaurus aralensis (RIABININ, 1937) (sic)

Holotype: PEN AN SSR 1/5009

Locality: As per NORMAN & SUES, 2000…Alim Tau site, Chuley region of the Chimkent/Tashkent area of eastern Kazakhstan (old Kyrk-kuduk, in the region of the Allym-tau Range west of Sary-Agach railway station, Kazakhstan).

Horizon: Dabrazinskaya Svita.

Biostratigraphy:

Age: Turonian Stage, Uppermost Gallic Subepoch-Santonian Stage, Lower Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Posterior part of skull, dentale, suarangular, 4 cervical, 2 dorsal, humerus, ischium, femur, and tibia.

Referred material:

RYAN, 1997

Locality: Republic of Tajikistan.

Horizon: Yalovach Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material:

Number: Not given:

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Species: fuyunensis WU, 1984 (nomen dubium, in WEISHAMPEL & HORNER, 1990)
Etymology: In reference to Fuyan, Xinjiang Uygur Zizhiqu (Sinkang) Province, China
= Yaxartosaurus fuyunensis WU, 1984 (nomen dubium)

Holotype:

Locality: Ulungurhe, Fuyan, Junggar Basin, Xinjiang Uygur Zizhiqu (Sinkang) Province, China.

Horizon: Ulungurhe Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material: Dentary.