Arietitidae

Arietitidae is a family of true ammonites that make up part of the superfamily Psiloceratoidea, named after the type genus Arietites. They comprise medium-size to large or gigantic genera which in general are strongly ribbed, tuberculate in some, with keeled or grooved and keeled venters, and well differentiated ammonitic sutures. The aptycus is single valved with a shiny, concentrically striated surface.

Arietitidae

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
PsiloceratoideaPBDB
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 least 16 million years on record.

The record covers at least 199.5 Mya to 183.5 Mya. No occurrence read is dated outside 237 Mya to 161.5 Mya.

Middle Triassic — about 0 of 1000 occurrencesLate Triassic — about 1 of 1000 occurrencesLate TriassicEarly Jurassic — about 997 of 1000 occurrencesEarly JurassicMiddle Jurassic — about 2 of 1000 occurrencesMiddle JurassicLate Jurassic — about 0 of 1000 occurrences239–236 Mya — about 0.0 occurrences236–233 Mya — about 0.1 occurrences233–231 Mya — about 0.1 occurrences231–228 Mya — about 0.1 occurrences228–225 Mya — about 0.1 occurrences225–223 Mya — about 0.1 occurrences223–220 Mya — about 0.1 occurrences220–218 Mya — about 0.1 occurrences218–215 Mya — about 0.1 occurrences215–212 Mya — about 0.1 occurrences212–210 Mya — about 0.1 occurrences210–207 Mya — about 0.1 occurrences207–204 Mya — about 0.2 occurrences204–202 Mya — about 0.3 occurrences202–199 Mya — about 269 occurrences199–197 Mya — about 274 occurrences197–194 Mya — about 274 occurrences194–191 Mya — about 125 occurrences191–189 Mya — about 14 occurrences189–186 Mya — about 14 occurrences186–184 Mya — about 12 occurrences184–181 Mya — about 5 occurrences181–178 Mya — about 4 occurrences178–176 Mya — about 4 occurrences176–173 Mya — about 2 occurrences173–170 Mya — about 0.3 occurrences170–168 Mya — about 0.3 occurrences168–165 Mya — about 0.3 occurrences165–163 Mya — about 0.3 occurrences163–160 Mya — about 0.1 occurrences199.5 Mya183.5 Mya239 Mya160 Mya

1,000 occurrences of Arietitidae on record, most of them in the Early Jurassic. 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

1,000 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

49 formations

Sunrise — 38.81°N, 117.60°WSunrise — 38.47°N, 118.43°WSunrise — 38.49°N, 118.09°WSunrise — 38.66°N, 118.19°WSunrise — 38.89°N, 117.87°WInklin — 59.34°N, 133.73°WInklin — 59.31°N, 133.84°WInklin — 59.20°N, 133.89°WInklin — 59.29°N, 133.98°WInklin — 59.32°N, 133.89°WInklin — 59.42°N, 134.00°WLast Creek — 51.09°N, 122.97°WLast Creek — 51.05°N, 122.97°WLower Lias — 51.80°N, 1.88°WSandilands — 53.93°N, 133.15°WSandilands — 53.18°N, 132.02°WGraylock — 44.11°N, 119.43°WBroadford Beds — 57.25°N, 5.87°WCalcaires à Gryphées — 47.06°N, 4.74°ESierra de Santa Rosa — 30.63°N, 112.57°WBlue Lias — 50.00°N, 2.00°WBlue Lias — 51.00°N, 3.00°WBlue Lias — 50.71°N, 2.96°WTolo Channel — 22.45°N, 114.28°ETolo Channel — 22.49°N, 114.32°ETolo Channel — 22.42°N, 114.03°EJinji — 22.16°N, 112.50°EJinji — 22.07°N, 112.52°EJinji — 24.04°N, 114.20°EJinji — 22.80°N, 112.65°EIsztimér Limestone — 47.20°N, 17.90°EIsztimér Limestone — 46.98°N, 17.30°EIsztimér — 47.18°N, 17.83°EAngulatensandstein — 48.87°N, 10.10°EAngulatensandstein — 48.94°N, 10.37°EAngulatensandstein — 48.74°N, 9.12°EAngulatensandstein — 48.70°N, 9.24°EAngulatensandstein — 48.73°N, 9.25°EAdnet — 47.14°N, 9.84°EAdnet — 47.17°N, 10.03°EAntimonio — 30.63°N, 112.57°WHuayacocotla — 20.33°N, 98.22°WFernie — 53.25°N, 118.25°WFernie — 56.10°N, 123.04°WMarnes et Calcaires de Strassen — 49.61°N, 6.08°ESchnöll — 47.70°N, 13.17°ETalkeetna — 57.73°N, 155.40°WAdnet — 46.01°N, 25.47°EOust — 36.52°N, 10.06°E

Loading coastlines…

The named rock units Arietitidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 25 further formations hold fewer occurrences each and are not listed. 362 occurrences have no formation on record, which is common for older literature.

Arietitidae and its relatives

Early Jurassic

Where Arietitidae and its relatives were recorded in the Early Jurassic.

Found in the same rock

563 taxa

The Paleobiology Database records 311 sites for Arietitidae, and this reads 240 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

90 references

Each of the 1,000 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. 78 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 Arietitidae

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 itPsiloceratoidea through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1875