Strophodus

Strophodus is an extinct genus of durophagous hybodont known from the Triassic to Cretaceous. It was formerly confused with Asteracanthus.

Strophodus

Sebastian Stumpf, Christoph Kettler, René Kindlimann, Gilles Cuny & Jürgen Kriwet · CC BY 4.0 · 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
AcrodontidaePBDB
Diet
carnivorePBDB, for Chondrichthyes
Life habit
nektonicPBDB, for Chondrichthyes
Motility
actively mobilePBDB, for Chondrichthyes

Time the record covers

At least 194 million years on record.

The record covers at least 201.4 Mya to 7.246 Mya. No occurrence read is dated outside 205.7 Mya to 5.333 Mya.

Late Triassic — about 2 of 20 occurrencesEarly Jurassic — about 0 of 20 occurrencesMiddle Jurassic — about 2 of 20 occurrencesLate Jurassic — about 5 of 20 occurrencesLate JurassicEarly Cretaceous — about 8 of 20 occurrencesEarly CretaceousLate Cretaceous — about 0 of 20 occurrencesPaleocene — about 0 of 20 occurrencesEocene — about 1 of 20 occurrencesEoceneOligocene — about 0 of 20 occurrencesMiocene — about 2 of 20 occurrencesMiocenePliocene — about 0 of 20 occurrencesPleistocene — about 0 of 20 occurrences210–203 Mya — about 1 occurrence203–196 Mya — about 0.6 occurrences175–168 Mya — about 0.1 occurrences168–161 Mya — about 2 occurrences161–154 Mya — about 4 occurrences154–147 Mya — about 0.9 occurrences140–133 Mya — about 6 occurrences133–126 Mya — about 2 occurrences126–119 Mya — about 0.1 occurrences57–50 Mya — about 0.3 occurrences50–43 Mya — about 0.3 occurrences43–36 Mya — about 0.3 occurrences36–29 Mya — about 0.1 occurrences29–22 Mya — about 0.3 occurrences22–15 Mya — about 0.7 occurrences8.3–1.3 Mya — about 1 occurrence201.4 Mya7.246 Mya210 Mya1 Mya

20 occurrences of Strophodus on record, most of them in the Early 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

20 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

7 formations

Rosa Blanca — 6.86°N, 73.23°WRosa Blanca — 6.83°N, 73.24°WKorallenkalk — 52.36°N, 9.70°EJaisalmer — 27.06°N, 71.01°EJaisalmer — 27.01°N, 70.95°EVuache — 46.83°N, 6.52°EExter — 48.56°N, 9.07°EBlack Rock Sandstone — 37.99°S, 145.04°EFossil Bluff Sandstone — 40.98°S, 145.73°E

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The named rock units Strophodus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.

Strophodus and its relatives

Early Cretaceous

Where Strophodus and its relatives were recorded in the Early Cretaceous.

Found in the same rock

279 taxa

The Paleobiology Database records 16 sites for Strophodus, 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

11 references

Each of the 20 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 Strophodus

Credit
Sebastian Stumpf, Christoph Kettler, René Kindlimann, Gilles Cuny & Jürgen Kriwet
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Strophodus 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 itAcrodontidae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1838