Sinornithosaurus

Sinornithosaurus is a genus of feathered dromaeosaurid dinosaur from the early Cretaceous Period of the Yixian Formation in what is now China. It was the fifth non–avian feathered dinosaur genus discovered by 1999. The original specimen was collected from the Sihetun locality of western Liaoning. It was found in the Jianshangou beds of the Yixian Formation, dated to 124.5 million years ago. Additional specimens have been found in the younger Dawangzhangzi bed, dating to around 122 million years ago.

Sinornithosaurus

Laikayiu · CC BY-SA 3.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.

On record

Recorded, not inferred
Sits inside
MicroraptorinaePBDB
Diet
carnivorePBDB, for Dromaeosauridae
Life habit
ground dwellingPBDB, for Dromaeosauridae
Motility
actively mobilePBDB, for Theropoda
Environment
terrestrialPBDB, for Dromaeosauridae
Length
2 mWikidata

Time the record covers

At most 6.2 million years on record.

Every occurrence read is dated to somewhere between 125.77 Mya and 119.57 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Cretaceous — about 3 of 3 occurrencesEarly Cretaceous126–126 Mya — about 0.1 occurrences126–125 Mya — about 0.1 occurrences125–125 Mya — about 0.1 occurrences125–125 Mya — about 0.1 occurrences125–125 Mya — about 0.1 occurrences125–124 Mya — about 0.1 occurrences124–124 Mya — about 0.1 occurrences124–124 Mya — about 0.1 occurrences124–124 Mya — about 0.1 occurrences124–123 Mya — about 0.1 occurrences123–123 Mya — about 0.1 occurrences123–123 Mya — about 0.1 occurrences123–123 Mya — about 0.1 occurrences123–122 Mya — about 0.1 occurrences122–122 Mya — about 0.1 occurrences122–122 Mya — about 0.1 occurrences122–122 Mya — about 0.1 occurrences122–121 Mya — about 0.1 occurrences121–121 Mya — about 0.1 occurrences121–121 Mya — about 0.1 occurrences121–121 Mya — about 0.1 occurrences121–121 Mya — about 0.1 occurrences121–120 Mya — about 0.1 occurrences120–120 Mya — about 0.1 occurrences120–120 Mya — about 0.1 occurrences120–120 Mya — about 0.1 occurrences126.3 Mya119.1 Mya

3 occurrences of Sinornithosaurus on record, most of them in the Early Cretaceous. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.

When

3 occurrences

These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.

Found in

1 formation

Yixian — 41.60°N, 120.87°EYixian — 41.60°N, 120.84°EYixian — 41.13°N, 121.14°E

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The named rock units Sinornithosaurus has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Sinornithosaurus and its relatives

Early Cretaceous

Where Sinornithosaurus and its relatives were recorded in the Early Cretaceous.

Found in the same rock

27 taxa

The Paleobiology Database records 3 sites for Sinornithosaurus, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.

This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.

Entered from

3 references

Each of the 3 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Sinornithosaurus

Credit
Laikayiu
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Sinornithosaurus was found in Sketchfab.

Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itMicroraptorinae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Xu et al. 1999