Segisaurus

Segisaurus is a genus of small coelophysid theropod dinosaur, that measured approximately 1 metre in length. The only known specimen was discovered in early Jurassic strata in Tsegi Canyon, Arizona, for which it was named. Segisaurus is the only dinosaur to have ever been excavated from the area.

Segisaurus

Camp, C. L. · Public Domain · 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
CoelophysinaePBDB
Diet
carnivorePBDB, for Theropoda
Life habit
ground dwelling, solitaryPBDB, for Theropoda
Motility
actively mobilePBDB, for Theropoda
Environment
terrestrialPBDB, for Theropoda
Length
1.5 mWikidata

Time the record covers

At most 19 million years on record.

Every occurrence read is dated to somewhere between 192.9 Mya and 174.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Jurassic — about 2 of 2 occurrencesEarly JurassicMiddle Jurassic — about 0 of 2 occurrences193–193 Mya — about 0.0 occurrences193–192 Mya — about 0.1 occurrences192–191 Mya — about 0.1 occurrences191–191 Mya — about 0.1 occurrences191–190 Mya — about 0.1 occurrences190–190 Mya — about 0.1 occurrences190–189 Mya — about 0.1 occurrences189–188 Mya — about 0.1 occurrences188–188 Mya — about 0.1 occurrences188–187 Mya — about 0.1 occurrences187–186 Mya — about 0.1 occurrences186–186 Mya — about 0.1 occurrences186–185 Mya — about 0.1 occurrences185–184 Mya — about 0.1 occurrences184–184 Mya — about 0.1 occurrences184–183 Mya — about 0.0 occurrences183–183 Mya — about 0.0 occurrences183–182 Mya — about 0.0 occurrences182–181 Mya — about 0.0 occurrences181–181 Mya — about 0.0 occurrences181–180 Mya — about 0.0 occurrences180–179 Mya — about 0.0 occurrences179–179 Mya — about 0.0 occurrences179–178 Mya — about 0.0 occurrences178–177 Mya — about 0.0 occurrences177–177 Mya — about 0.0 occurrences177–176 Mya — about 0.0 occurrences176–175 Mya — about 0.0 occurrences175–175 Mya — about 0.0 occurrences175–174 Mya — about 0.0 occurrences193.4 Mya174.2 Mya

2 occurrences of Segisaurus on record, most of them in the Early Jurassic. 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

2 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

Navajo Sandstone — 36.78°N, 110.53°WNavajo Sandstone — 36.64°N, 111.45°W

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

Segisaurus and its relatives

Early Jurassic

Where Segisaurus and its relatives were recorded in the Early Jurassic.

Found in the same rock

No other named taxon is catalogued from any of those sites.

The Paleobiology Database records 2 sites for Segisaurus, and this reads all of them.

Entered from

2 references

Each of the 2 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Segisaurus

Credit
Camp, C. L.
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itCoelophysinae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Camp 1936