Only one fossil specimen is known, a slab and counterslab given catalog number CAGS00-IG03.
It is in the collection of the Chinese Academy of Geological Sciences.

Sinodelphys szalayi grew only 15 cm (5.9 in) long and possibly weighed about 30 g (1.05 oz).
Its fossilized skeleton is surrounded by impressions of fur and soft tissue, thanks to the exceptional sediment that preserves such details.
Luo et al. (
2003) inferred from the foot structure of Sinodelphys that it was a scansorial tree-dweller, like its non-marsupial contemporary Eomaia and modern opossums such as Didelphis.
Sinodelphys probably hunted worms and insects.
Most Mesozoic metatherians have been found in North America and Asia.
Most lived during the Late Cretaceous between 90 and 66 million years ago.
Only one fossil specimen is known, a slab and counterslab given catalog number CAGS00-IG03. It is in the collection of the Chinese Academy of Geological Sciences.
Sinodelphys szalayi grew only 15 cm (5.9 in) long and possibly weighed about 30 g (1.05 oz). Its fossilized skeleton is surrounded by impressions of fur and soft tissue, thanks to the exceptional sediment that preserves such details. Luo et al. (2003) inferred from the foot structure of Sinodelphys that it was a scansorial tree-dweller, like its non-marsupial contemporary Eomaia and modern opossums such as Didelphis. Sinodelphys probably hunted worms and insects. Most Mesozoic metatherians have been found in North America and Asia. Most lived during the Late Cretaceous between 90 and 66 million years ago.
Sinodelphys