Habrosaurus

Habrosaurus, meaning "graceful lizard", is an extinct genus of prehistoric salamanders, and the oldest and largest known member of the family Sirenidae. Two species are known, H. prodilatus from the middle Campanian Dinosaur Park Formation of Alberta, and H. dilatus from the late Maastrichtian and Paleocene of western North America. It is relatively common in the Lance Formation of Wyoming, and less common in the Hell Creek Formation of Montana.

Habrosaurus

Sauriazoicillus · CC BY-SA 4.0 · 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
SirenidaePBDB
Diet
carnivorePBDB, for Temnospondyli
Life habit
amphibiousPBDB, for Temnospondyli
Motility
actively mobilePBDB, for Temnospondyli
Environment
brackish,freshwater,terrestrialPBDB, for Tetrapoda

Time the record covers

At least 20 million years on record.

The record covers at least 83.6 Mya to 63.4 Mya. No occurrence read is dated outside 85.7 Mya to 60.9 Mya.

Late Cretaceous — about 58 of 70 occurrencesLate CretaceousPaleocene — about 12 of 70 occurrencesPaleocene86–85 Mya — about 0.2 occurrences85–84 Mya — about 0.5 occurrences84–84 Mya — about 0.5 occurrences84–83 Mya — about 0.6 occurrences83–82 Mya — about 0.6 occurrences82–81 Mya — about 0.6 occurrences81–80 Mya — about 0.6 occurrences80–79 Mya — about 0.6 occurrences79–78 Mya — about 0.6 occurrences78–78 Mya — about 0.6 occurrences78–77 Mya — about 0.6 occurrences77–76 Mya — about 0.6 occurrences76–75 Mya — about 0.6 occurrences75–74 Mya — about 0.6 occurrences74–73 Mya — about 0.6 occurrences73–72 Mya — about 0.6 occurrences72–72 Mya — about 5 occurrences72–71 Mya — about 7 occurrences71–70 Mya — about 7 occurrences70–69 Mya — about 7 occurrences69–68 Mya — about 7 occurrences68–67 Mya — about 7 occurrences67–66 Mya — about 7 occurrences66–66 Mya — about 4 occurrences66–65 Mya — about 2 occurrences65–64 Mya — about 2 occurrences64–63 Mya — about 2 occurrences63–62 Mya — about 2 occurrences62–61 Mya — about 2 occurrences61–60 Mya — about 1 occurrence83.6 Mya63.4 Mya86.2 Mya60.4 Mya

70 occurrences of Habrosaurus on record, most of them in the Late 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

70 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

15 formations

Hell Creek — 47.80°N, 106.10°WHell Creek — 45.98°N, 103.75°WHell Creek — 46.10°N, 103.30°WHell Creek — 46.33°N, 103.90°WHell Creek — 47.68°N, 106.43°WHell Creek — 47.62°N, 107.32°WHell Creek — 47.57°N, 107.10°WHell Creek — 47.55°N, 107.10°WHell Creek — 47.52°N, 106.40°WHell Creek — 47.60°N, 106.27°WHell Creek — 47.61°N, 106.90°WHell Creek — 47.27°N, 107.13°WHell Creek — 45.05°N, 101.97°WHell Creek — 45.50°N, 103.10°WHell Creek — 45.00°N, 103.19°WHell Creek — 47.60°N, 107.00°WHell Creek — 47.47°N, 107.37°WLance — 43.30°N, 104.37°WLance — 43.12°N, 104.64°WLance — 41.57°N, 108.67°WLance — 43.18°N, 104.53°WLance — 43.15°N, 104.57°WLance — 43.13°N, 104.49°WLance — 43.25°N, 104.65°WLance — 43.00°N, 104.50°WFort Union — 45.80°N, 109.80°WFort Union — 43.85°N, 108.35°WFort Union — 46.05°N, 104.48°WFort Union — 47.60°N, 107.00°WFort Union — 41.30°N, 107.74°WFerris — 41.94°N, 106.88°WIron Springs — 37.57°N, 113.43°WIron Springs — 37.90°N, 112.74°WJudith River — 47.81°N, 109.59°WMesaverde — 42.85°N, 107.28°WNacimiento — 36.57°N, 107.97°WFrenchman — 49.30°N, 108.40°WLebo — 45.80°N, 109.80°WDinosaur Park — 49.96°N, 110.27°WBlack Peaks — 29.28°N, 103.55°WMarshalltown — 40.30°N, 74.30°WStraight Cliffs — 37.62°N, 112.16°WKaiparowits — 37.42°N, 111.77°W

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The named rock units Habrosaurus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.

Habrosaurus and its relatives

Late Cretaceous

Where Habrosaurus and its relatives were recorded in the Late Cretaceous.

Found in the same rock

662 taxa

The Paleobiology Database records 67 sites for Habrosaurus, 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

24 references

Each of the 70 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. 12 further references are not listed. 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 content2

Picture of Habrosaurus

Credit
Sauriazoicillus
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

Photogrammetry

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Habrosaurus dilatus · UCM:Paleontology:UCM:FossilVert:43428

Smithsonian Open Access was 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 itSirenidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gilmore 1928