Dallasiella willistoni

Dallasiella is an extinct genus of mackerel sharks that lived during the Late Cretaceous. It contains two valid species, D. willistoni and D. brachyodon, which have been found in North America and Europe. While formerly placed in the families Cretoxyrhinidae and Archaeolamnidae, it is now considered Lamniformes incertae sedis.

No picture of Dallasiella willistoni was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Dallasiella willistoni, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
DallasiellaPBDB
Diet
carnivorePBDB, for Lamniformes
Life habit
nektonicPBDB, for Lamniformes
Motility
actively mobilePBDB, for Lamniformes

Time the record covers

At least 4.1 million years on record.

The record covers at least 93.9 Mya to 89.8 Mya. No occurrence read is dated outside 100.5 Mya to 85.7 Mya.

Early Cretaceous — about 0 of 13 occurrencesLate Cretaceous — about 13 of 13 occurrencesLate Cretaceous101–100 Mya — about 0.0 occurrences100–100 Mya — about 0.2 occurrences100–99 Mya — about 0.2 occurrences99–99 Mya — about 0.2 occurrences99–98 Mya — about 0.2 occurrences98–98 Mya — about 0.2 occurrences98–97 Mya — about 0.2 occurrences97–97 Mya — about 0.2 occurrences97–96 Mya — about 0.2 occurrences96–96 Mya — about 0.2 occurrences96–95 Mya — about 0.2 occurrences95–95 Mya — about 0.2 occurrences95–94 Mya — about 0.2 occurrences94–94 Mya — about 0.7 occurrences94–93 Mya — about 1 occurrence93–93 Mya — about 1 occurrence93–92 Mya — about 1 occurrence92–92 Mya — about 1 occurrence92–91 Mya — about 1 occurrence91–90 Mya — about 1 occurrence90–90 Mya — about 1 occurrence90–89 Mya — about 0.4 occurrences89–89 Mya — about 0.1 occurrences89–88 Mya — about 0.1 occurrences88–88 Mya — about 0.1 occurrences88–87 Mya — about 0.1 occurrences87–87 Mya — about 0.1 occurrences87–86 Mya — about 0.1 occurrences86–86 Mya — about 0.1 occurrences86–85 Mya — about 0.0 occurrences93.9 Mya89.8 Mya101 Mya85.2 Mya

13 occurrences of Dallasiella willistoni 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

13 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

5 formations

Carlile Shale — 39.78°N, 98.15°WCarlile Shale — 38.72°N, 99.32°WCarlile Shale — 47.01°N, 107.87°WKaskapau — 55.71°N, 117.60°WGreenhorn Limestone — 38.92°N, 98.90°WDunvegan — 55.92°N, 118.60°WAtco — 32.53°N, 96.99°W

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The named rock units Dallasiella willistoni has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Dallasiella willistoni and its relatives

Late Cretaceous

Where Dallasiella willistoni and its relatives were recorded in the Late Cretaceous.

Found in the same rock

143 taxa

The Paleobiology Database records 13 sites for Dallasiella willistoni, 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

9 references

Each of the 13 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. 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 content0

No picture of Dallasiella willistoni was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Dallasiella willistoni, or no answer at all. This entry cannot say which.

No 3D scan of Dallasiella willistoni 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 itDallasiella through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cappetta and Case 1999