Dufrenoyia

Dufrenoyia is an extinct genus of Cretaceous ammonites included in the family Parahoplitidae. These fast-moving nektonic carnivores lived in the Cretaceous period. The type species of the genus is Ammonites dufrenoyi.

Dufrenoyia

Hectonichus · CC BY-SA 3.0 · 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
DeshayesitinaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 8.2 million years on record.

Every occurrence read is dated to somewhere between 121.4 Mya and 113.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Cretaceous — about 137 of 137 occurrencesEarly Cretaceous122–121 Mya — about 5 occurrences121–121 Mya — about 14 occurrences121–121 Mya — about 14 occurrences121–120 Mya — about 14 occurrences120–120 Mya — about 14 occurrences120–120 Mya — about 14 occurrences120–119 Mya — about 9 occurrences119–119 Mya — about 3 occurrences119–119 Mya — about 3 occurrences119–119 Mya — about 3 occurrences119–118 Mya — about 3 occurrences118–118 Mya — about 3 occurrences118–118 Mya — about 3 occurrences118–117 Mya — about 3 occurrences117–117 Mya — about 3 occurrences117–117 Mya — about 3 occurrences117–116 Mya — about 3 occurrences116–116 Mya — about 3 occurrences116–116 Mya — about 3 occurrences116–115 Mya — about 3 occurrences115–115 Mya — about 3 occurrences115–115 Mya — about 3 occurrences115–115 Mya — about 3 occurrences115–114 Mya — about 3 occurrences114–114 Mya — about 3 occurrences114–114 Mya — about 3 occurrences114–113 Mya — about 3 occurrences113–113 Mya — about 1.0 occurrences121.9 Mya112.7 Mya

137 occurrences of Dufrenoyia 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

137 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

21 formations

La Peña — 25.43°N, 100.12°WLa Peña — 25.62°N, 100.46°WLes Graous — 43.84°N, 7.08°EFerruginous Sands — 50.60°N, 1.32°WFerruginous Sands — 50.63°N, 1.17°WFerruginous Sands — 50.60°N, 1.35°WHythe — 51.08°N, 1.18°EHythe — 51.08°N, 1.08°EHythe — 51.15°N, 0.88°EHythe — 51.28°N, 0.53°EHythe — 51.25°N, 0.07°WCow Creek Limestone — 29.92°N, 98.33°WCow Creek Limestone — 30.09°N, 97.68°WCow Creek Limestone — 30.43°N, 98.06°WCow Creek Limestone — 30.48°N, 98.01°WCow Creek Limestone — 30.19°N, 97.56°WCow Creek Limestone — 30.33°N, 98.13°WCow Creek Limestone — 31.47°N, 105.30°WPine Island Shale — 32.63°N, 93.90°WPine Island Shale — 31.57°N, 93.55°WPine Island Shale — 32.80°N, 93.02°WPine Island Shale — 32.72°N, 93.35°WPine Island Shale — 32.63°N, 93.60°WSogukcam — 40.82°N, 42.15°ELowell — 31.35°N, 109.89°WLa Péna — 25.62°N, 100.47°WLa Péna — 25.55°N, 100.37°WSarcheshmeh — 37.77°N, 56.93°ECogollo — 10.00°N, 72.50°WValle Grande — 10.25°N, 63.92°WValle Grande — 10.17°N, 63.42°WSanganeh — 37.72°N, 56.12°ETamzergout — 31.21°N, 7.88°WPochote — 19.43°N, 99.13°WHammett Shale — 29.91°N, 98.36°WMural — 31.08°N, 109.57°WHammett — 29.82°N, 98.30°WTravis Peak — 30.33°N, 97.80°WUpper Bedoulian — 38.37°N, 1.27°WForcall — 40.54°N, 0.18°E

Loading coastlines…

The named rock units Dufrenoyia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 15 occurrences have no formation on record, which is common for older literature.

Dufrenoyia and its relatives

Early Cretaceous

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

Found in the same rock

162 taxa

The Paleobiology Database records 88 sites for Dufrenoyia, 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

22 references

Each of the 137 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. 10 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 content2

Picture of Dufrenoyia

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itDeshayesitinae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Kilian and Reboul 1915)