Hemicidaris intermedia

Hemicidaris intermedia

Uncredited · 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
HemicidarisPBDB
Diet
grazer, deposit feederPBDB, for Echinoidea
Life habit
epifaunalPBDB, for Echinoidea
Motility
actively mobilePBDB, for Echinoidea
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 3.1 million years on record.

The record covers at least 157.9 Mya to 154.8 Mya. No occurrence read is dated outside 159 Mya to 149.2 Mya.

Late Jurassic — about 13 of 13 occurrencesLate Jurassic159–159 Mya — about 0.2 occurrences159–158 Mya — about 0.3 occurrences158–158 Mya — about 0.3 occurrences158–158 Mya — about 0.1 occurrences155–154 Mya — about 0.7 occurrences154–154 Mya — about 0.8 occurrences154–154 Mya — about 0.8 occurrences154–153 Mya — about 0.8 occurrences153–153 Mya — about 0.8 occurrences153–153 Mya — about 0.8 occurrences153–152 Mya — about 0.8 occurrences152–152 Mya — about 0.8 occurrences152–152 Mya — about 0.8 occurrences152–151 Mya — about 0.8 occurrences151–151 Mya — about 0.8 occurrences151–151 Mya — about 0.8 occurrences151–150 Mya — about 0.8 occurrences150–150 Mya — about 0.8 occurrences150–149 Mya — about 0.8 occurrences149–149 Mya — about 0.5 occurrences157.9 Mya154.8 Mya159.5 Mya148.7 Mya

13 occurrences of Hemicidaris intermedia on record, most of them in the Late 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

13 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

3 formations

Mt. Lysa — 50.90°N, 21.67°EMt. Lysa — 51.26°N, 21.06°EWheatley Limestone — 51.75°N, 1.20°WBahamite sequence — 53.77°N, 14.08°E

Loading coastlines…

The named rock units Hemicidaris intermedia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.

Hemicidaris intermedia and its relatives

Late Jurassic

Where Hemicidaris intermedia and its relatives were recorded in the Late Jurassic.

Found in the same rock

33 taxa

The Paleobiology Database records 13 sites for Hemicidaris intermedia, 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

2 references

Each of the 13 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Hemicidaris intermedia

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

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 itHemicidaris through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Fleming 1828)