Reconstructing Huangshanlong anhuiensis.

Skye McDavid, September 11, 2022

Huangshanlong anhuiensis is Mamenchisaurid Sauropod Dinosaur from the Middle Jurassic of Anhui Province, Eastern China.

The holotype, AGB 5818, consists of a right humerus, radius, and ulna. Funnily enough, these are the same bones (though not from the same side) as those present in Anhuilong, a close relative, also from Anhui, which I illustrated in April.

The phylogenetic analysis conducted for the description of Anhuilong recovered Anhuilong and Huangshanlong as sister taxa. It's possible that they were grouped together because they can be coded for most if not all of the same characters; synapomorphies of the (Anhuilong + Huangshanlong) clade may in fact be more widely distributed, but given the information available to me, I see no reason to question the two being close relatives.

Right humerus, ulna, and radius of Huangshanlong anhuiensis in lateral view.Modified from figures in Huang et al., 2014 (fair use)
Right humerus, ulna, and radius of Huangshanlong anhuiensis in lateral view. Illustration by Skye McDavid

The three bones are well-figured in the description of Huangshanlong, making it easy to make a skeletal diagram. After parsing through the mostly Chinese-language text using a combination of machine translation and general knowledge of dinosaur literature, I illustrated the bones.

You may notice that my Anhuilong skeletal faces left while my Huangshanlong skeletal faces right. This is intentional. Some illustrators prefer to make all their skeletal diagrams face the same direction, but in cases where the material is fragmentary and comes only from one side of the body, I prefer to show that side in front. It is also easier to get reference images in lateral view as opposed to medial view.

I re-used the silhouette that I had originally made for Anhuilong, horizontally flipped and with slight modifications.

Here is the skeletal diagram. You can download the high quality version from Wikimedia Commons. (It's under a CC-BY license, so you can pretty much do what you want with it.)

Oh, and as a side note, the name of Huangshanlong refers to Huangshan City, not the mountain range Huangshan (anglicized as the Yellow Mountains).


Huang JD, You HL, Yang JT, Ren XX (2014) A new sauropod dinosaur from the Middle Jurassic of Huangshan, Anhui Province. Vertebrata PalAsiatica 52(4):390-400 [PDF]

McDavid SN (2022) 'Anhuilong.png' Wikimedia Commons [link]

Ren XX, Huang JD, You HL (2020) The second mamenchisaurid dinosaur from the Middle Jurassic of Eastern China. Historical Biology 32(5):602-610 doi:10.1080/08912963.2018.1515935