Helicampodus

Helicampodus is an extinct genus of shark-like eugeneodont fish that lived during the Late Permian to Early Triassic period. Fossils of Helicampodus have been found in Asia. The largest teeth of Helicampodus kokeni are about 2.7 cm in length, which points to a maximum size of around 2 m based on its relatives. It was earlier placed in the families Helicoprionidae and Edestidae, but has more recently been placed in Helicampodontidae.

Helicampodus

Division of Vertebrate Paleontology, Yale Peabody Museum · 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
HelicampodontidaePBDB
Diet
carnivorePBDB, for Eugeneodontiformes
Life habit
nektonicPBDB, for Eugeneodontiformes
Motility
actively mobilePBDB, for Eugeneodontiformes

Time the record covers

At least 2.2 million years on record.

The record covers at least 254.14 Mya to 251.902 Mya. No occurrence read is dated outside 259.857 Mya to 251.1 Mya.

Permian — about 4 of 6 occurrencesPermianEarly Triassic — about 2 of 6 occurrencesEarly Triassic260–260 Mya — about 0.0 occurrences260–259 Mya — about 0.1 occurrences259–259 Mya — about 0.1 occurrences259–259 Mya — about 0.1 occurrences259–258 Mya — about 0.1 occurrences258–258 Mya — about 0.1 occurrences258–258 Mya — about 0.1 occurrences258–257 Mya — about 0.1 occurrences257–257 Mya — about 0.1 occurrences257–257 Mya — about 0.1 occurrences257–256 Mya — about 0.1 occurrences256–256 Mya — about 0.1 occurrences256–256 Mya — about 0.1 occurrences256–255 Mya — about 0.1 occurrences255–255 Mya — about 0.1 occurrences255–255 Mya — about 0.1 occurrences255–255 Mya — about 0.1 occurrences255–254 Mya — about 0.1 occurrences254–254 Mya — about 0.3 occurrences254–254 Mya — about 0.3 occurrences254–253 Mya — about 0.3 occurrences253–253 Mya — about 0.3 occurrences253–253 Mya — about 0.3 occurrences253–252 Mya — about 0.3 occurrences252–252 Mya — about 0.3 occurrences252–252 Mya — about 0.8 occurrences252–251 Mya — about 0.8 occurrences251–251 Mya — about 0.4 occurrences254.14 Mya251.902 Mya260.4 Mya250.6 Mya

6 occurrences of Helicampodus on record, most of them in the Permian. 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

6 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

4 formations

Chhidru — 35.75°N, 72.75°EChhidru — 32.55°N, 71.81°EKhunamuh — 34.00°N, 75.00°EAli Bashi — 38.97°N, 45.53°EToyoma — 38.65°N, 141.28°E

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The named rock units Helicampodus 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.

Helicampodus and its relatives

Permian

Where Helicampodus and its relatives were recorded in the Permian.

Found in the same rock

35 taxa

The Paleobiology Database records 6 sites for Helicampodus, 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

5 references

Each of the 6 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 Helicampodus

Credit
Division of Vertebrate Paleontology, Yale Peabody Museum
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Helicampodus 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 itHelicampodontidae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Branson 1935