Brachyrostra

Brachyrostra is a clade within the theropod dinosaur family Abelisauridae. It includes the famous genera Carnotaurus, Aucasaurus, potentially Abelisaurus as well as their close relatives from the Cretaceous Period of Argentina and Brazil plus Caletodraco from France. The group was first proposed in an analysis conducted by Juan Canale and colleagues in 2008. They found that all South American abelisaurids described up to that point grouped together as a sub-clade of Abelisauridae, which they named based on the relatively unusual shape of their skulls. They defined the clade Brachyrostra as "all the abelisaurids more closely related to Carnotaurus sastrei than to Majungasaurus crenatissimus."

Brachyrostra

Carnotaurus, Chlupáč Museum, Prague-2.jpg : Czech Wikipedia user Packa derivative work: Hic et nunc · 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
AbelisauridaePBDB
Diet
carnivorePBDB, for Theropoda
Life habit
ground dwelling, solitaryPBDB, for Theropoda
Motility
actively mobilePBDB, for Theropoda
Environment
terrestrialPBDB, for Theropoda

Time the record covers

At least 37 million years on record.

The record covers at least 110.1 Mya to 72.2 Mya. No occurrence read is dated outside 113.2 Mya to 66 Mya.

Early Cretaceous — about 5 of 28 occurrencesEarly CretaceousLate Cretaceous — about 23 of 28 occurrencesLate CretaceousPaleocene — about 0 of 28 occurrences114–113 Mya — about 0.2 occurrences113–111 Mya — about 0.5 occurrences111–109 Mya — about 1 occurrence109–108 Mya — about 2 occurrences108–106 Mya — about 1 occurrence101–99 Mya — about 0.2 occurrences99–98 Mya — about 0.3 occurrences98–96 Mya — about 0.3 occurrences96–95 Mya — about 0.3 occurrences95–93 Mya — about 0.6 occurrences93–91 Mya — about 0.8 occurrences91–90 Mya — about 0.8 occurrences90–88 Mya — about 0.7 occurrences88–86 Mya — about 0.7 occurrences86–85 Mya — about 3 occurrences85–83 Mya — about 4 occurrences83–81 Mya — about 0.7 occurrences81–80 Mya — about 0.7 occurrences80–78 Mya — about 0.7 occurrences78–77 Mya — about 0.7 occurrences77–75 Mya — about 0.7 occurrences75–73 Mya — about 0.7 occurrences73–72 Mya — about 1 occurrence72–70 Mya — about 2 occurrences70–68 Mya — about 2 occurrences68–67 Mya — about 2 occurrences67–65 Mya — about 0.7 occurrences110.1 Mya72.2 Mya114.1 Mya65.1 Mya

28 occurrences of Brachyrostra 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

28 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

13 formations

Bajo de la Carpa — 37.59°S, 69.32°WBajo de la Carpa — 39.12°S, 67.63°WHuincul — 39.20°S, 69.15°WHuincul — 39.25°S, 68.80°WAllen — 39.43°S, 67.29°WAllen — 38.76°S, 67.98°WAllen — 39.51°S, 67.39°WAnacleto — 37.88°S, 68.52°WAnacleto — 39.10°S, 67.55°WLa Colonia — 43.00°S, 67.55°WLa Colonia — 42.96°S, 67.55°WPortezuelo — 38.45°S, 68.72°WPortezuelo — 38.88°S, 69.48°WCandeleros — 39.40°S, 69.20°WPlottier — 37.39°S, 69.03°WLameta — 23.06°N, 73.34°EAmbolafotsy — 13.77°S, 49.53°ESão José do Rio Preto — 21.03°S, 49.21°WLos Blanquitos — 24.84°S, 65.39°WSaint Jouin — 49.66°N, 0.16°E

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The named rock units Brachyrostra has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Brachyrostra and its relatives

Late Cretaceous

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

Found in the same rock

72 taxa

The Paleobiology Database records 24 sites for Brachyrostra, 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

23 references

Each of the 28 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. 11 further references are not listed. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Brachyrostra

Credit
Carnotaurus, Chlupáč Museum, Prague-2.jpg : Czech Wikipedia user Packa derivative work: Hic et nunc
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Brachyrostra 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 itAbelisauridae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Canale et al. 2008