Alocolytoceras

Alocolytoceras is a lytoceratid ammonite with whorls that pass during growth from round to oval, rounded-quadrate, or compressed; with about 19 deep constrictions per whorl, with as many as 21 sharp ribs in between. The shell is evolute. All whorls are visible from either side.

No picture of Alocolytoceras was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Alocolytoceras, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
AlocolytoceratinaePBDB
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 22 million years on record.

The record covers at least 192.9 Mya to 170.9 Mya. No occurrence read is dated outside 199.5 Mya to 168.6 Mya.

Early Jurassic — about 31 of 41 occurrencesEarly JurassicMiddle Jurassic — about 10 of 41 occurrencesMiddle Jurassic200–199 Mya — about 0.3 occurrences199–198 Mya — about 0.6 occurrences198–197 Mya — about 0.6 occurrences197–196 Mya — about 0.6 occurrences196–195 Mya — about 0.6 occurrences195–194 Mya — about 0.6 occurrences194–193 Mya — about 0.6 occurrences193–192 Mya — about 0.4 occurrences192–190 Mya — about 0.4 occurrences190–189 Mya — about 0.4 occurrences189–188 Mya — about 0.4 occurrences188–187 Mya — about 0.4 occurrences187–186 Mya — about 0.4 occurrences186–185 Mya — about 0.4 occurrences185–184 Mya — about 0.4 occurrences184–183 Mya — about 0.3 occurrences183–182 Mya — about 2 occurrences182–181 Mya — about 2 occurrences181–180 Mya — about 3 occurrences180–179 Mya — about 3 occurrences179–178 Mya — about 3 occurrences178–177 Mya — about 3 occurrences177–175 Mya — about 3 occurrences175–174 Mya — about 3 occurrences174–173 Mya — about 1 occurrence173–172 Mya — about 1 occurrence172–171 Mya — about 1 occurrence171–170 Mya — about 2 occurrences170–169 Mya — about 2 occurrences169–168 Mya — about 1 occurrence192.9 Mya170.9 Mya200.1 Mya168 Mya

41 occurrences of Alocolytoceras 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

41 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

10 formations

Marnes de Fontaneilles — 43.85°N, 3.12°EAgoudim Marls — 32.00°N, 5.03°WJurensismergel — 47.95°N, 7.82°EBugarone — 43.33°N, 13.22°EAmergou — 34.50°N, 5.13°WZegrí — 37.57°N, 3.50°WInici — 37.64°N, 13.00°EHuayacocotla — 20.33°N, 98.22°WAdnet — 47.46°N, 13.56°EDogger — 54.42°N, 0.93°W

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The named rock units Alocolytoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 occurrences have no formation on record, which is common for older literature.

Alocolytoceras and its relatives

Early Jurassic

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

Found in the same rock

216 taxa

The Paleobiology Database records 33 sites for Alocolytoceras, 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

18 references

Each of the 41 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. 6 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 content0

No picture of Alocolytoceras was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Alocolytoceras, or no answer at all. This entry cannot say which.

No 3D scan of Alocolytoceras 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 itAlocolytoceratinae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1900