Yakounia

Yakounia is a genus of evolutely coiled, planispiral ammonite, coiled so all whorls are exposed, with close transverse ribbing. This genus lived during the Toarcian stage, late early Jurassic, and has been found in western British Columbia. The brief description is based on that of the subfamily.

No picture of Yakounia 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 Yakounia, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
GrammoceratinaePBDB
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 16 million years on record.

Every occurrence read is dated to somewhere between 184.2 Mya and 168.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Jurassic — about 19 of 21 occurrencesEarly JurassicMiddle Jurassic — about 2 of 21 occurrencesMiddle Jurassic185–184 Mya — about 0.0 occurrences184–184 Mya — about 0.0 occurrences184–183 Mya — about 0.0 occurrences183–182 Mya — about 0.0 occurrences182–182 Mya — about 0.0 occurrences182–181 Mya — about 0.0 occurrences181–181 Mya — about 0.0 occurrences181–180 Mya — about 0.8 occurrences180–180 Mya — about 2 occurrences180–179 Mya — about 2 occurrences179–178 Mya — about 2 occurrences178–178 Mya — about 2 occurrences178–177 Mya — about 2 occurrences177–177 Mya — about 2 occurrences177–176 Mya — about 2 occurrences176–176 Mya — about 2 occurrences176–175 Mya — about 2 occurrences175–175 Mya — about 1 occurrence175–174 Mya — about 0.3 occurrences174–173 Mya — about 0.3 occurrences173–173 Mya — about 0.3 occurrences173–172 Mya — about 0.3 occurrences172–172 Mya — about 0.3 occurrences172–171 Mya — about 0.3 occurrences171–171 Mya — about 0.1 occurrences171–170 Mya — about 0.0 occurrences170–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–168 Mya — about 0.0 occurrences168–168 Mya — about 0.0 occurrences184.7 Mya167.7 Mya

21 occurrences of Yakounia 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

21 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

2 formations

Phantom Creek — 53.38°N, 132.26°WSmithers — 56.73°N, 127.35°W

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The named rock units Yakounia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Yakounia and its relatives

Early Jurassic

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

Found in the same rock

18 taxa

The Paleobiology Database records 13 sites for Yakounia, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

3 references

Each of the 21 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 content0

No picture of Yakounia 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 Yakounia, or no answer at all. This entry cannot say which.

No 3D scan of Yakounia 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 itGrammoceratinae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.