Eoptolamnidae

Pseudoscapanorhynchidae is a family of extinct mackerel sharks that lived during the Cretaceous and potentially the Paleogene. It currently includes Cretodus, Eoptolamna, Leptostyrax, Protolamna, Pseudoscapanorhynchus, and possibly Lilamna.

Eoptolamnidae

Ghedoghedo · 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
LamniformesPBDB
Diet
carnivorePBDB, for Lamniformes
Life habit
nektonicPBDB, for Lamniformes
Motility
actively mobilePBDB, for Lamniformes

Time the record covers

At least 73 million years on record.

The record covers at least 121.4 Mya to 48.07 Mya. No occurrence read is dated outside 125.77 Mya to 37.71 Mya.

Early Cretaceous — about 29 of 64 occurrencesEarly CretaceousLate Cretaceous — about 34 of 64 occurrencesLate CretaceousPaleocene — about 0 of 64 occurrencesEocene — about 1 of 64 occurrencesEocene128–124 Mya — about 0.6 occurrences124–121 Mya — about 1 occurrence121–118 Mya — about 2 occurrences118–115 Mya — about 2 occurrences115–112 Mya — about 2 occurrences112–109 Mya — about 4 occurrences109–106 Mya — about 6 occurrences106–103 Mya — about 6 occurrences103–100 Mya — about 6 occurrences100–97 Mya — about 4 occurrences97–94 Mya — about 4 occurrences94–91 Mya — about 3 occurrences91–88 Mya — about 2 occurrences88–85 Mya — about 3 occurrences85–82 Mya — about 5 occurrences82–79 Mya — about 4 occurrences79–76 Mya — about 4 occurrences76–73 Mya — about 4 occurrences73–70 Mya — about 0.5 occurrences70–66 Mya — about 0.1 occurrences66–63 Mya — about 0.0 occurrences48–45 Mya — about 0.3 occurrences45–42 Mya — about 0.3 occurrences42–39 Mya — about 0.3 occurrences39–36 Mya — about 0.1 occurrences121.4 Mya48.07 Mya128 Mya36 Mya

64 occurrences of Eoptolamnidae 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

64 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

28 formations

Newhaven Chalk — 51.45°N, 1.36°WNewhaven Chalk — 50.88°N, 0.81°WNewhaven Chalk — 51.53°N, 0.70°WNewhaven Chalk — 50.67°N, 1.10°WLabguva — 55.09°N, 22.90°ELabguva — 54.92°N, 23.85°EPaluxy — 32.00°N, 98.25°WPaluxy — 32.22°N, 98.20°WJiesia — 55.06°N, 24.37°EMancos Shale — 39.00°N, 110.35°WMancos Shale — 35.33°N, 105.90°WHiraiga — 39.94°N, 141.94°EHunstanton — 54.15°N, 0.17°WBrasta — 55.09°N, 22.90°EBrasta — 54.92°N, 23.85°EAntlers — 33.28°N, 97.62°WGlen Rose Limestone — 32.37°N, 97.69°WPawpaw — 32.73°N, 97.32°WArtoles — 40.82°N, 0.28°WGearle Siltstone — 23.11°S, 114.18°ECarlile Shale — 39.08°N, 99.24°WMelovatka — 50.88°N, 44.74°EPaw Paw — 33.03°N, 97.22°WCulver Chalk — 50.85°N, 1.15°WPoint Lookout — 35.20°N, 107.05°WLyaminsk — 56.14°N, 37.38°EBurgsteinfurt — 52.19°S, 7.17°EHabur — 26.90°N, 70.60°EWoburn Sands — 52.03°N, 0.40°WSandgate — 51.24°N, 0.15°WVaals Greensand — 51.74°N, 6.09°E

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The named rock units Eoptolamnidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 further formations hold fewer occurrences each and are not listed. 21 occurrences have no formation on record, which is common for older literature.

Eoptolamnidae and its relatives

Late Cretaceous

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

Found in the same rock

438 taxa

The Paleobiology Database records 64 sites for Eoptolamnidae, 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

30 references

Each of the 64 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. 18 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 Eoptolamnidae

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

No 3D scan of Eoptolamnidae was found in MorphoSource and Sketchfab.

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 itLamniformes through timeFormations of the Late CretaceousThe world it lived on

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