Mamenchisauridae

Mamenchisauridae is a family of sauropod dinosaurs known mainly from Jurassic deposits in East Asia. Its members are distinguished by exceptionally long necks, often containing many elongated vertebrae.

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Sauropoda: Sauropoda is the dinosaur group of large, long-necked, herbivorous quadrupeds with column-like limbs. Mamenchisauridae belongs within this broader group of long-necked dinosaurs.
Omeisaurus: Omeisaurus is a genus of sauropod dinosaurs known from Middle Jurassic rocks in China. It is among the East Asian genera commonly assigned to Mamenchisauridae.
Jurassic: The Jurassic is a geologic period lasting from about 201 to 145 million years ago. Most known mamenchisaurid fossils come from rocks deposited during this period.
Dinosaur phylogeny: Dinosaur phylogeny is the study of evolutionary relationships among dinosaurs. Analyses place mamenchisaurid genera differently as new anatomical data are added.
Mamenchisaurus: Mamenchisaurus is a genus of East Asian sauropod dinosaurs, including species with exceptionally elongated necks. The family takes its name from this genus, one of its best-known members.
Xinjiangtitan: Xinjiangtitan is a sauropod genus known from a partial skeleton found in Xinjiang, China. Its exceptionally long neck offers a notable comparison with other mamenchisaurids.
Shaximiao Formation: The Shaximiao Formation is a sequence of Middle to Late Jurassic sedimentary rocks in Sichuan, China. It has yielded many sauropod fossils, including several attributed to Mamenchisauridae.
Dinosaur paleontology: Dinosaur paleontology studies dinosaur fossils, biology, evolution, and environments. The family's membership depends on interpreting fragmentary dinosaur fossils.
Sauropod neck: A sauropod neck is the elongated cervical region of a sauropod dinosaur's spine. Its extreme length is the family's most recognizable anatomical feature.
Mamenchisaurus hochuanensis: Mamenchisaurus hochuanensis is a species of sauropod dinosaur named from fossils found in Sichuan, China. Its neck is among the especially long examples associated with the family.