Trigonia hemisphaerica

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

On record

Recorded, not inferred
Sits inside
TrigoniaPBDB
Diet
suspension feederPBDB, for Trigoniidae
Life habit
shallow infaunalPBDB, for Trigoniidae
Motility
fast-movingPBDB, for Trigoniidae
Vision
blindPBDB, for Trigoniidae
Environment
marinePBDB, for Trigoniidae

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 168.2 Mya.

Early Jurassic — about 1 of 4 occurrencesEarly JurassicMiddle Jurassic — about 3 of 4 occurrencesMiddle Jurassic200–199 Mya — about 0.1 occurrences199–198 Mya — about 0.2 occurrences198–197 Mya — about 0.2 occurrences197–196 Mya — about 0.2 occurrences196–195 Mya — about 0.2 occurrences195–194 Mya — about 0.2 occurrences194–193 Mya — about 0.1 occurrences175–174 Mya — about 0.2 occurrences174–173 Mya — about 0.3 occurrences173–172 Mya — about 0.3 occurrences172–171 Mya — about 0.3 occurrences171–170 Mya — about 0.8 occurrences170–169 Mya — about 0.8 occurrences169–168 Mya — about 0.3 occurrences192.9 Mya170.9 Mya200.1 Mya167.6 Mya

4 occurrences of Trigonia hemisphaerica on record, most of them in the Middle 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

4 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

Sunrise — 41.64°N, 118.65°WMormon — 40.06°N, 120.81°W

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The named rock units Trigonia hemisphaerica has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Trigonia hemisphaerica and its relatives

Middle Jurassic

Where Trigonia hemisphaerica and its relatives were recorded in the Middle Jurassic.

Found in the same rock

17 taxa

The Paleobiology Database records 4 sites for Trigonia hemisphaerica, 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 4 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 Trigonia hemisphaerica 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 Trigonia hemisphaerica, or no answer at all. This entry cannot say which.

No 3D scan of Trigonia hemisphaerica 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itTrigonia through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lycett 1877