Rolfodon

Rolfodon is an extinct genus of shark in the family Chlamydoselachidae. It is closely related to the extant frilled sharks in the genus Chlamydoselachus, which it can be differentiated from by tooth morphology. It is named after late Canadian paleontologist Rolf Ludvigsen.

Rolfodon

Feichtinger I, Beaury B, Guinot G, Harzhauser M, Nichterl T, Stoykova K, Pollerspöck J · CC0 · 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
ChlamydoselachidaePBDB
Diet
carnivorePBDB, for Hexanchiformes
Life habit
nektonicPBDB, for Hexanchiformes
Motility
actively mobilePBDB, for Hexanchiformes

Time the record covers

At least 58 million years on record.

The record covers at least 72.2 Mya to 13.82 Mya. No occurrence read is dated outside 83.6 Mya to 7.246 Mya.

Late Cretaceous — about 7 of 17 occurrencesLate CretaceousPaleocene — about 7 of 17 occurrencesPaleoceneEocene — about 0 of 17 occurrencesOligocene — about 0 of 17 occurrencesMiocene — about 3 of 17 occurrencesMiocene85–82 Mya — about 0.6 occurrences82–80 Mya — about 1 occurrence80–77 Mya — about 1 occurrence77–75 Mya — about 1 occurrence75–72 Mya — about 1 occurrence72–69 Mya — about 0.4 occurrences69–67 Mya — about 0.4 occurrences67–64 Mya — about 2 occurrences64–61 Mya — about 3 occurrences61–59 Mya — about 1 occurrence59–56 Mya — about 0.9 occurrences56–53 Mya — about 0.0 occurrences16–14 Mya — about 2 occurrences14–11 Mya — about 0.4 occurrences11–8.4 Mya — about 0.4 occurrences8.4–5.7 Mya — about 0.2 occurrences72.2 Mya13.82 Mya85 Mya6 Mya

17 occurrences of Rolfodon 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

17 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

10 formations

Northumberland — 49.55°N, 124.70°WNorthumberland — 49.54°N, 124.71°WWaipara Greensand — 43.05°S, 172.62°ETakatika Grit — 43.75°S, 176.68°WNierental — 47.66°N, 14.86°ESanta Marta — 63.90°S, 57.90°WAngostura — 0.88°N, 78.83°WOiching — 47.94°N, 13.01°EByala — 42.88°N, 27.90°EIdozawa — 36.24°N, 138.90°EHaratajino — 36.31°N, 138.84°E

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The named rock units Rolfodon 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.

Rolfodon and its relatives

Late Cretaceous

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

Found in the same rock

76 taxa

The Paleobiology Database records 16 sites for Rolfodon, 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

12 references

Each of the 17 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 content1

Picture of Rolfodon

Credit
Feichtinger I, Beaury B, Guinot G, Harzhauser M, Nichterl T, Stoykova K, Pollerspöck J
Licence
CC0
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 itChlamydoselachidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cappetta et al. 2019