Sebecosuchia

Sebecosuchia is an extinct group of mesoeucrocodylian crocodyliforms that includes the families Sebecidae and Baurusuchidae. The group was long thought to have first appeared in the Late Cretaceous with the baurusuchids, but Razanandrongobe pushes the origin of Sebecosuchia to the Middle Jurassic. The last surviving members of the group, the sebecids, appear to have lasted until the late Miocene or early Pliocene on the Greater Antilles. Fossils have been found primarily from South America but have also been found in Europe, North Africa, Madagascar, and the Indian subcontinent.

Sebecosuchia

Nobu Tamura ( http://spinops.blogspot.com ) · CC BY 2.5 · via Wikidata/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
ZiphosuchiaPBDB
Diet
carnivorePBDB, for Pseudosuchia
Motility
actively mobilePBDB, for Osteichthyes
Environment
marinePBDB, for Mesoeucrocodylia

Time the record covers

At least 76 million years on record.

The record covers at least 83.6 Mya to 7.246 Mya. No occurrence read is dated outside 85.7 Mya to 3.6 Mya.

Late Cretaceous — about 28 of 115 occurrencesLate CretaceousPaleocene — about 9 of 115 occurrencesPaleoceneEocene — about 52 of 115 occurrencesEoceneOligocene — about 7 of 115 occurrencesOligoceneMiocene — about 18 of 115 occurrencesMiocenePliocene — about 0 of 115 occurrencesPleistocene — about 0 of 115 occurrences87–84 Mya — about 1 occurrence84–82 Mya — about 1 occurrence82–79 Mya — about 0.7 occurrences79–76 Mya — about 0.7 occurrences76–73 Mya — about 0.7 occurrences73–70 Mya — about 7 occurrences70–67 Mya — about 11 occurrences67–65 Mya — about 6 occurrences65–62 Mya — about 2 occurrences62–59 Mya — about 1 occurrence59–56 Mya — about 5 occurrences56–53 Mya — about 4 occurrences53–50 Mya — about 3 occurrences50–47 Mya — about 5 occurrences47–45 Mya — about 9 occurrences45–42 Mya — about 9 occurrences42–39 Mya — about 10 occurrences39–36 Mya — about 8 occurrences36–33 Mya — about 4 occurrences33–30 Mya — about 1 occurrence30–28 Mya — about 2 occurrences28–25 Mya — about 3 occurrences25–22 Mya — about 2 occurrences22–19 Mya — about 1 occurrence19–16 Mya — about 0.8 occurrences16–13 Mya — about 3 occurrences13–10 Mya — about 12 occurrences7.7–4.8 Mya — about 0.7 occurrences4.8–2.0 Mya — about 0.3 occurrences83.6 Mya7.246 Mya87 Mya2 Mya

115 occurrences of Sebecosuchia on record, most of them in the Eocene. 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

115 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

46 formations

Vitakri — 29.68°N, 69.37°EDensuș-Ciula — 45.62°N, 22.78°ESarmiento — 45.40°S, 67.72°WSarmiento — 43.75°S, 69.58°WSarmiento — 45.40°S, 67.75°WSarmiento — 45.33°S, 68.00°WVillavieja — 3.26°N, 75.17°WVillavieja — 3.25°N, 75.17°WPozo — 7.33°S, 74.95°WPozo — 7.33°S, 74.95°WPozo — 6.57°S, 76.27°WLumbrera — 23.25°S, 65.58°WLumbrera — 25.83°S, 65.45°WLumbrera — 25.72°S, 65.40°WJibou — 47.26°N, 23.26°ECorrales — 41.32°N, 5.71°WCorrales — 41.37°N, 5.75°WCorrales — 41.37°N, 5.72°WJudith River — 46.46°N, 109.41°WJudith River — 48.01°N, 108.91°WDivisadero Largo — 32.87°S, 68.94°WSanta Lucía — 17.98°S, 65.60°WSables du Castrais — 43.37°N, 1.99°ESables du Castrais — 43.78°N, 2.19°EChambira — 7.32°S, 74.93°WChambira — 7.35°S, 74.95°WCabrerizos — 40.98°N, 5.55°WCabrerizos — 41.00°N, 5.69°WEntrala — 41.40°N, 5.67°WEntrala — 41.43°N, 5.57°WMazaterón — 41.53°N, 2.12°WGeste — 26.06°S, 67.41°WLance — 41.57°N, 108.67°WSierra Perenchiza — 39.60°N, 0.97°WBajo de la Carpa — 37.38°S, 68.90°WParángula — 8.63°N, 70.23°WCsehbánya — 47.22°N, 17.60°ERío Loro — 26.60°S, 65.16°WMaiz Gordo — 26.07°S, 65.37°W

Loading coastlines…

The named rock units Sebecosuchia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 22 further formations hold fewer occurrences each and are not listed. 27 occurrences have no formation on record, which is common for older literature.

Sebecosuchia and its relatives

Eocene

Where Sebecosuchia and its relatives were recorded in the Eocene.

Found in the same rock

1,074 taxa

The Paleobiology Database records 102 sites for Sebecosuchia, 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

62 references

Each of the 115 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. 50 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 content1

Picture of Sebecosuchia

Credit
Nobu Tamura ( http://spinops.blogspot.com )
Licence
CC BY 2.5
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 itZiphosuchia through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Colbert 1946)