Hemidiscus

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

On record

Recorded, not inferred
Sits inside
HemidiscaceaePBDB
Diet
"photoautotroph"PBDB, for Bacillariophyceae
Environment
marine,brackish,freshwaterPBDB, for Bacillariophyceae

Time the record covers

At least 306 million years on record.

The record covers at least 307 Mya to 11.7 ka. No occurrence read is dated outside 323.4 Mya to 0 Mya.

Carboniferous — about 2 of 197 occurrencesCarboniferousPermian — about 0 of 197 occurrencesEarly Triassic — about 0 of 197 occurrencesMiddle Triassic — about 0 of 197 occurrencesLate Triassic — about 0 of 197 occurrencesEarly Jurassic — about 0 of 197 occurrencesMiddle Jurassic — about 0 of 197 occurrencesLate Jurassic — about 0 of 197 occurrencesEarly Cretaceous — about 0 of 197 occurrencesLate Cretaceous — about 0 of 197 occurrencesPaleocene — about 0 of 197 occurrencesEocene — about 0 of 197 occurrencesOligocene — about 0 of 197 occurrencesMiocene — about 92 of 197 occurrencesPliocene — about 43 of 197 occurrencesPleistocene — about 58 of 197 occurrences330–319 Mya — about 0.3 occurrences319–308 Mya — about 0.7 occurrences308–297 Mya — about 1 occurrence33–22 Mya — about 0.1 occurrences22–11 Mya — about 12 occurrences11–0 Mya — about 183 occurrences307 Mya11.7 ka330 Mya0 Mya

197 occurrences of Hemidiscus on record, most of them in the Miocene. The Paleobiology Database records this as a living group. 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

197 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

Auernig — 46.57°N, 13.22°EValdeteja — 43.35°N, 4.77°W

Loading coastlines…

The named rock units Hemidiscus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 195 occurrences have no formation on record, which is common for older literature.

Hemidiscus and its relatives

Miocene

Where Hemidiscus and its relatives were recorded in the Miocene.

Found in the same rock

103 taxa

The Paleobiology Database records 187 sites for Hemidiscus, 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

21 references

Each of the 197 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. 9 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 Hemidiscus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

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

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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

Keep going

What may have been alongside itHemidiscaceae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Wallich 1860