Euhelopodidae is a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of sauropod dinosaur

Dinosaur

Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...

s which includes the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Euhelopus

Euhelopus

Euhelopus is a genus of sauropod dinosaur that lived during the Early Cretaceous, between 130 and 112 million years ago . It lived in what is now Shandong Province in China. A large herbivore, it weighed approximately 15-20 tons and attained an adult length of 15m...

. The family name was first proposed by American paleontologist Alfred Sherwood Romer

Alfred Romer

Alfred Sherwood Romer was an American paleontologist and comparative anatomist and a specialist in vertebrate evolution.-Biography:...

 in 1956. The four genera Chiayusaurus

Chiayusaurus

Chiayusaurus was a genus of sauropod dinosaur known from teeth found in Asia. Two species have been named for this obscure genus. It was originally named as Chiayüsaurus, but the ICZN does not permit special characters, so it has become Chiayusaurus...

, Omeisaurus

Omeisaurus

Omeisaurus is a genus of sauropod dinosaur from the Middle Jurassic Period of what is now China. Its name comes from Mount Emei, where it was discovered in the lower Shaximiao Formation of Sichuan Province.Like other sauropods, Omeisaurus was herbivorous and large...

, Tienshanosaurus

Tienshanosaurus

Tienshanosaurus is a genus of dinosaur from the Late Jurassic. It was a sauropod which lived in what is now China....

, and Euhelopus were the original proposed euhelopodines (subfamily Euhelopodinae). Other Chinese genera, such as Mamenchisaurus

Mamenchisaurus

Mamenchisaurus was a plant-eating four-legged dinosaur, known for its remarkably long neck which made up half its total length. It is known from numerous species which ranged in time from 160 to 145 million years ago, from the Oxfordian to Tithonian ages of the late Jurassic Period of...

, used to be placed within this family, but are now in Mamenchisauridae

Mamenchisauridae

Mamenchisauridae is an extinct family of sauropod dinosaurs. The family was first named by Chinese paleontologists C.C. Young and H.C. Chao in 1972, in a paper describing Mamenchisaurus. Other mamenchisaurids may include Bellusaurus, Chuanjiesaurus, Eomamenchisaurus, Hudiesaurus, Klamelisaurus,...

. However, the traditional Euhelopodidae has been abandoned by many taxonomists for the time being. There may be such a family, but currently Jurassic and Cretaceous Asian sauropods are poorly known and have not yet been subjected to many detailed analyses, so it is unknown if there really is a Euhelopodidae of more than Euhelopus.