Pachyceratidae

Pachyceratidae is a family of Perisphinctoidean ammonites from the upper Middle - and lower Upper Jurassic. Genera within the Pachyceratidae have shells that are in general moderately involte but with most of the inner whorls exposed; whorl sections subquadrate to subtrapezoidal, with rounded venter. Ribbing is strong, in some sharp. Primary ribs typically branch above mid flanks into twos, threes, and even fours.

Pachyceratidae

Hectonichus · CC BY-SA 3.0 · via Wikidata/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
PerisphinctoideaPBDB
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 2.5 million years on record.

The record covers at least 161.5 Mya to 159 Mya. No occurrence read is dated outside 165.3 Mya to 154.8 Mya.

Middle Jurassic — about 140 of 151 occurrencesMiddle JurassicLate Jurassic — about 11 of 151 occurrencesLate Jurassic165–165 Mya — about 10 occurrences165–165 Mya — about 14 occurrences165–164 Mya — about 14 occurrences164–164 Mya — about 14 occurrences164–164 Mya — about 14 occurrences164–163 Mya — about 14 occurrences163–163 Mya — about 14 occurrences163–162 Mya — about 14 occurrences162–162 Mya — about 14 occurrences162–162 Mya — about 14 occurrences162–161 Mya — about 4 occurrences161–161 Mya — about 1 occurrence161–160 Mya — about 1 occurrence160–160 Mya — about 1 occurrence160–160 Mya — about 1 occurrence160–159 Mya — about 1 occurrence159–159 Mya — about 1 occurrence159–159 Mya — about 0.9 occurrences159–158 Mya — about 0.9 occurrences158–158 Mya — about 0.6 occurrences158–157 Mya — about 0.2 occurrences157–157 Mya — about 0.2 occurrences157–157 Mya — about 0.2 occurrences157–156 Mya — about 0.2 occurrences156–156 Mya — about 0.2 occurrences156–155 Mya — about 0.2 occurrences155–155 Mya — about 0.2 occurrences155–155 Mya — about 0.1 occurrences161.5 Mya159 Mya165.8 Mya154.3 Mya

151 occurrences of Pachyceratidae on record. 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

151 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

11 formations

Tuwaiq Mt.Lst. — 24.30°N, 46.53°ETuwaiq Mt.Lst. — 23.90°N, 46.53°ETuwaiq Mt.Lst. — 22.43°N, 46.42°ETuwaiq Mt.Lst. — 21.62°N, 45.50°ETuwaiq Mt.Lst. — 24.75°N, 46.08°ETuwaiq Mt.Lst. — 25.05°N, 45.67°ETuwaiq Mt.Lst. — 25.37°N, 45.50°ETuwaiq Mt.Lst. — 25.57°N, 45.00°ETuwaiq Mountain — 25.04°N, 45.89°ETuwaiq Mountain — 23.92°N, 46.03°ETuwaiq Mountain — 22.50°N, 46.00°ETuwaiq Mountain — 25.31°N, 45.76°ETuwaiq Mountain — 25.05°N, 45.67°EDhruma — 25.05°N, 45.67°EDhruma — 26.20°N, 44.83°EDhruma — 26.28°N, 44.83°EShuqra — 14.27°N, 48.57°EShuqra — 14.32°N, 48.45°ETuwaiq Mountain Limestone — 25.75°N, 45.17°ETuwaiq Mountain Limestone — 24.52°N, 46.41°E"Sengenthal" — 49.23°N, 11.47°EMarnes jaunes — 46.65°N, 4.87°ECalcaires roux — 47.03°N, 4.83°EHabo beds — 23.20°N, 69.80°EOgrodzieniec Glauconitic Marl — 50.46°N, 19.52°EMarnes de Dives — 49.32°N, 0.00°E

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The named rock units Pachyceratidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 82 occurrences have no formation on record, which is common for older literature.

Found in the same rock

374 taxa

The Paleobiology Database records 80 sites for Pachyceratidae, 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

20 references

Each of the 151 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. 8 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 content1

Picture of Pachyceratidae

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

No 3D scan of Pachyceratidae 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 itPerisphinctoidea through timeThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Buckman 1918