Unranked clade
Valid Extinct

Mamenchisauridae

mamenchisaurid
(Chao 1965)

Mamenchisauridae is a family of sauropod dinosaurs belonging to the Eusauropoda known from the Jurassic and Early Cretaceous of Asia and Africa. Mamenchisaurids are characterized by their proportionately extremely long necks. Some members of the group reached gigantic sizes, amongst the largest of all sauropods.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
72
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Mamenchisauridae
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Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Massopoda Unranked clade
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Sauropodiformes Unranked clade
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Sauropoda Unranked clade
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Gravisauria Unranked clade
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Eusauropoda Unranked clade
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Mamenchisauridae Unranked clade
Fossil sites 72 geolocated sites
Distribution
Top countries
🇨🇳 China
54
🇹🇭 Thailand
7
🇲🇳 Mongolia
7
🇷🇺 Russia
2
🇹🇿 Tanzania
2
Geological formations
Shaximiao
21
Shishugou
7
Ulan Malgait
6
Phu Kradung
6
Suining
3
Kalazha
3
Hongqin
2
Zhanghe
2
Chuanjie
2
Xiangtang
2
Temporal distribution
Albian (113.2–100.5 Ma)
1
Aptian (121.4–113.2 Ma)
1
Hauterivian (132.6–125.77 Ma)
1
Tithonian (149.2–143.1 Ma)
22
Kimmeridgian (154.8–149.2 Ma)
10
Oxfordian (161.5–154.8 Ma)
10
Callovian (165.3–161.5 Ma)
16
Bathonian (168.2–165.3 Ma)
7
Bajocian (170.9–168.2 Ma)
3
Pliensbachian (192.9–184.2 Ma)
1
Synonyms (1)
Omeisauridae subjective synonym of Mamenchisauridae
News 2
Uragasaurus – A New Mamenchisaurid Sauropod from Thailand
bone limb vertebra Thailand fossil +4
A team of international researchers has named a remarkable new species of long-necked dinosaur from Thailand. Uragasaurus kalasinensis is the first formally described member of the Mamenchisauridae from Thailand. Although the fossil evidence consists of a single vertebra, the bone preserves a unique combination of anatomical features that enabled scientists to identify an entirely new
15/07/2026 everythingdinosaur
New Species of Long-Necked Dinosaur Identified in Thailand
New Species of Long-Necked Dinosaur Identified in Thailand
Thailand Dinosauria Mamenchisauridae Uragasaurus new species
Paleontologists working in northeastern Thailand have identified a new species of mamenchisaurid sauropod dinosaur, offering fresh evidence that a group of giant sauropods once thought to be almost exclusively East Asian also roamed mainland Southeast Asia. The post New Species of Long-Necked Dinosaur Identified in Thailand appeared first on Sci.News: Breaking Science News.
09/07/2026 sci-news
Images 3
Bibliography
Original description
S. Chao. 1965. Wǒguó de dà kǒnglóng yī héchuān mǎmén xī lóng [China’s largest dinosaur—Hehchuan-Mamenxian dragon]. Sheng wu xue tong bao [Bulletin of Biology] 1965(4):35-37
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