Hemiaster

Hemiaster

via iDigBio · CC BY-SA · via iDigBio. 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
Also called
heart urchinPBDB
Sits inside
HemiasteridaePBDB
Diet
deposit feeder, detritivorePBDB, for Spatangoida
Life habit
shallow infaunalPBDB, for Spatangoida
Motility
slow-movingPBDB, for Spatangoida
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Spatangoida

Time the record covers

At least 107 million years on record.

The record covers at least 113.2 Mya to 5.333 Mya. No occurrence read is dated outside 119.57 Mya to 3.6 Mya.

Early Cretaceous — about 71 of 376 occurrencesEarly CretaceousLate Cretaceous — about 256 of 376 occurrencesLate CretaceousPaleocene — about 22 of 376 occurrencesPaleoceneEocene — about 12 of 376 occurrencesEoceneOligocene — about 3 of 376 occurrencesOligoceneMiocene — about 11 of 376 occurrencesMiocenePliocene — about 1 of 376 occurrencesPleistocene — about 0 of 376 occurrences122–118 Mya — about 0.3 occurrences118–114 Mya — about 0.6 occurrences114–110 Mya — about 13 occurrences110–106 Mya — about 17 occurrences106–102 Mya — about 30 occurrences102–98 Mya — about 28 occurrences98–94 Mya — about 27 occurrences94–90 Mya — about 33 occurrences90–86 Mya — about 16 occurrences86–82 Mya — about 24 occurrences82–78 Mya — about 19 occurrences78–74 Mya — about 19 occurrences74–70 Mya — about 46 occurrences70–66 Mya — about 57 occurrences66–62 Mya — about 10 occurrences62–58 Mya — about 6 occurrences58–54 Mya — about 6 occurrences54–50 Mya — about 2 occurrences50–46 Mya — about 1 occurrence46–41 Mya — about 1 occurrence41–37 Mya — about 4 occurrences37–33 Mya — about 3 occurrences33–29 Mya — about 1 occurrence29–25 Mya — about 1 occurrence25–21 Mya — about 1 occurrence21–17 Mya — about 3 occurrences17–13 Mya — about 6 occurrences13–9.3 Mya — about 1 occurrence9.3–5.3 Mya — about 0.0 occurrences5.3–1.3 Mya — about 1.0 occurrences113.2 Mya5.333 Mya122 Mya1 Mya

376 occurrences of Hemiaster on record, most of them in the Late Cretaceous. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

376 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

109 formations

Prairie Bluff — 34.24°N, 89.00°WPrairie Bluff — 33.90°N, 88.98°WPrairie Bluff — 33.38°N, 88.74°WPrairie Bluff — 32.04°N, 87.26°WPrairie Bluff — 32.13°N, 87.40°WPrairie Bluff — 32.43°N, 88.04°WPrairie Bluff — 32.07°N, 87.33°WPrairie Bluff — 33.46°N, 88.79°WPrairie Bluff — 32.67°N, 88.19°WPrairie Bluff — 34.05°N, 88.97°WPrairie Bluff — 34.25°N, 88.98°WGrès verts helvétiques — 45.99°N, 6.71°EGrès verts helvétiques — 46.10°N, 6.82°EGrès verts helvétiques — 46.03°N, 6.57°EGrès verts helvétiques — 46.01°N, 6.35°EGrès verts helvétiques — 45.98°N, 6.78°EGrès verts helvétiques — 46.05°N, 6.52°EGrès verts helvétiques — 46.95°N, 6.31°ESaratoga Chalk — 33.97°N, 93.37°WSaratoga Chalk — 34.08°N, 93.12°WSaratoga Chalk — 34.02°N, 93.29°WSaratoga Chalk — 34.04°N, 93.14°WSaratoga Chalk — 33.80°N, 93.70°WSaratoga Chalk — 33.76°N, 93.90°WCabo de Lata — 43.49°N, 3.79°WCabo de Lata — 42.91°N, 1.78°WCabo de Lata — 42.84°N, 2.18°WMaastricht — 50.85°N, 5.70°EMaastricht — 50.85°N, 6.77°EMaastricht — 50.86°N, 5.79°ERipley — 34.60°N, 88.83°WRipley — 32.51°N, 88.01°WRipley — 34.12°N, 88.88°WRipley — 35.32°N, 88.42°WRipley — 34.24°N, 88.91°WVincentown — 39.97°N, 74.68°WVincentown — 39.93°N, 74.78°WVincentown — 39.88°N, 75.13°WVincentown — 40.04°N, 74.98°WVincentown — 39.80°N, 75.06°WGulpen — 50.73°N, 5.67°EGulpen — 50.75°N, 5.67°EAurora Limestone — 26.42°N, 103.25°WCorsicana Marl — 29.57°N, 97.96°WCorsicana Marl — 29.37°N, 98.71°WCorsicana Marl — 29.37°N, 98.78°WCorsicana Marl — 29.40°N, 98.63°WCorsicana Marl — 29.59°N, 98.08°WEl Zadorra — 42.88°N, 2.20°WNeptune Glacier — 72.05°S, 69.68°WNeptune Glacier — 72.13°S, 69.00°WNeptune Glacier — 71.82°S, 68.50°WNeptune Glacier — 71.85°S, 68.72°WNeptune Glacier — 71.68°S, 68.22°WNeptune Glacier — 71.98°S, 68.62°WNeptune Glacier — 71.87°S, 68.77°WAnacacho Limestone — 29.20°N, 100.07°WAnacacho Limestone — 29.36°N, 99.48°WAnacacho Limestone — 29.38°N, 98.86°WAnacacho Limestone — 29.44°N, 98.66°WAnacacho Limestone — 29.40°N, 99.17°WNacatoch Sand — 31.31°N, 96.90°WNacatoch Sand — 34.15°N, 93.06°WNacatoch Sand — 33.80°N, 93.65°WNacatoch Sand — 33.91°N, 93.31°WNacatoch Sand — 33.85°N, 93.61°WAustin Chalk — 29.41°N, 99.47°WAustin Chalk — 29.28°N, 99.47°WAustin Chalk — 29.42°N, 99.18°WAustin Chalk — 29.06°N, 100.64°WAustin Chalk — 29.65°N, 98.07°WHalal — 30.37°N, 34.45°EHalal — 30.37°N, 33.52°EOwl Creek — 34.75°N, 88.93°WOwl Creek — 34.45°N, 89.00°WOwl Creek — 34.23°N, 89.00°WLadd — 33.75°N, 117.68°WAbu Qada — 29.28°N, 34.72°EAbu Qada — 30.37°N, 34.45°EAbu Qada — 29.63°N, 34.40°EWata — 29.28°N, 34.72°EWata — 30.37°N, 34.45°EWata — 29.63°N, 34.40°EPicofrentes — 41.12°N, 2.77°WIndidura — 26.42°N, 103.25°WIndidura — 29.35°N, 101.05°WGulpen — 50.85°N, 5.70°EBarton Beds — 50.78°N, 1.73°WBarton Beds — 50.85°N, 1.78°WBarton Beds — 50.74°N, 1.69°W

Loading coastlines…

The named rock units Hemiaster has been recovered from, largest first. Drawn where the rock is now, not where it formed. 85 further formations hold fewer occurrences each and are not listed. 82 occurrences have no formation on record, which is common for older literature.

Hemiaster and its relatives

Late Cretaceous

Where Hemiaster and its relatives were recorded in the Late Cretaceous.

Found in the same rock

2,339 taxa

The Paleobiology Database records 309 sites for Hemiaster, and this reads 240 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

94 references

Each of the 376 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. 82 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 content2

Picture of Hemiaster

Source
iDigBio
Credit
via iDigBio
Licence
CC BY-SA
Commercial use
the licence allows it

Laser scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Hemiaster whitei · YPM:IP:YPM IP 009857

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

Keep going

What may have been alongside itHemiasteridae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz and Desor 1847