Hexanchus microdon

Hexanchus microdon is an extinct species of sixgill shark that was found worldwide from the mid-Cretaceous to the Paleocene.

No picture of Hexanchus microdon 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 Hexanchus microdon, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
HexanchusPBDB
Diet
carnivorePBDB, for Hexanchiformes
Life habit
nektonicPBDB, for Hexanchiformes
Motility
actively mobilePBDB, for Hexanchiformes

Time the record covers

At least 53 million years on record.

The record covers at least 113.2 Mya to 59.24 Mya. No occurrence read is dated outside 121.4 Mya to 56 Mya.

Early Cretaceous — about 1 of 36 occurrencesEarly CretaceousLate Cretaceous — about 31 of 36 occurrencesLate CretaceousPaleocene — about 4 of 36 occurrencesPaleoceneEocene — about 0 of 36 occurrences123–120 Mya — about 0.1 occurrences120–118 Mya — about 0.3 occurrences118–116 Mya — about 0.3 occurrences116–114 Mya — about 0.3 occurrences114–111 Mya — about 0.1 occurrences102–100 Mya — about 0.2 occurrences100–98 Mya — about 1 occurrence98–96 Mya — about 1 occurrence96–93 Mya — about 1.0 occurrences93–91 Mya — about 0.6 occurrences91–89 Mya — about 1 occurrence89–86 Mya — about 2 occurrences86–84 Mya — about 2 occurrences84–82 Mya — about 2 occurrences82–80 Mya — about 2 occurrences80–77 Mya — about 2 occurrences77–75 Mya — about 2 occurrences75–73 Mya — about 2 occurrences73–71 Mya — about 3 occurrences71–68 Mya — about 4 occurrences68–66 Mya — about 4 occurrences66–64 Mya — about 2 occurrences64–61 Mya — about 1 occurrence61–59 Mya — about 0.0 occurrences59–57 Mya — about 0.7 occurrences57–55 Mya — about 0.3 occurrences113.2 Mya59.24 Mya123 Mya55 Mya

36 occurrences of Hexanchus microdon 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

36 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

20 formations

Gerhartsreit — 47.94°N, 13.01°EMishash — 30.87°N, 34.94°EMishash — 30.83°N, 35.08°EMishash — 30.83°N, 34.92°ENorthumberland — 49.55°N, 124.70°WNorthumberland — 49.54°N, 124.71°WRødvig — 55.32°N, 12.44°EHornerstown — 40.10°N, 73.00°WMutsuo — 34.35°N, 135.33°EBurgsteinfurt — 52.19°N, 7.17°ELodo — 36.61°N, 120.68°WHiraiga — 39.64°N, 141.95°ELabguva — 55.09°N, 22.90°EGhared — 30.83°N, 35.08°EHinoshima — 32.40°N, 130.40°EItombe — 8.29°S, 13.35°ETrivières Chalk — 50.47°N, 4.03°ELezennes Chalk — 50.61°N, 3.12°ESalder — 52.07°N, 8.35°EBeckum — 51.82°N, 8.02°EKarsun — 52.02°N, 47.32°EAshizawa — 37.17°N, 140.94°ETor — 55.28°N, 12.44°E

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The named rock units Hexanchus microdon has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 occurrences have no formation on record, which is common for older literature.

Hexanchus microdon and its relatives

Late Cretaceous

Where Hexanchus microdon and its relatives were recorded in the Late Cretaceous.

Found in the same rock

283 taxa

The Paleobiology Database records 35 sites for Hexanchus microdon, 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

25 references

Each of the 36 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. 13 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 content0

No picture of Hexanchus microdon 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 Hexanchus microdon, or no answer at all. This entry cannot say which.

No 3D scan of Hexanchus microdon 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 itHexanchus through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Agassiz 1835)