Hyotissa semiplana

Hyotissa semiplana is an extinct species of large saltwater oysters, a fossil marine bivalve mollusk in the family Gryphaeidae, the foam oysters

Hyotissa semiplana

Hectonichus · CC BY-SA 3.0 · via Wikipedia/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
HyotissaPBDB
Diet
suspension feederPBDB, for Hyotissa
Life habit
epifaunalPBDB, for Hyotissa
Motility
stationary, attachedPBDB, for Hyotissa
Vision
blindPBDB, for Bivalvia
Environment
marine,brackishPBDB, for Ostreida

Time the record covers

At least 73 million years on record.

The record covers at least 89.8 Mya to 15.98 Mya. No occurrence read is dated outside 93.9 Mya to 5.333 Mya.

Late Cretaceous — about 39 of 43 occurrencesLate CretaceousPaleocene — about 2 of 43 occurrencesPaleoceneEocene — about 0 of 43 occurrencesOligocene — about 0 of 43 occurrencesMiocene — about 2 of 43 occurrencesMiocenePliocene — about 0 of 43 occurrences96–93 Mya — about 2 occurrences93–90 Mya — about 4 occurrences90–86 Mya — about 2 occurrences86–83 Mya — about 3 occurrences83–80 Mya — about 1 occurrence80–77 Mya — about 1 occurrence77–74 Mya — about 1 occurrence74–71 Mya — about 5 occurrences71–68 Mya — about 12 occurrences68–65 Mya — about 8 occurrences65–62 Mya — about 1 occurrence62–59 Mya — about 0.1 occurrences25–22 Mya — about 0.1 occurrences22–19 Mya — about 0.2 occurrences19–16 Mya — about 0.2 occurrences16–13 Mya — about 0.9 occurrences13–9.7 Mya — about 0.4 occurrences9.7–6.6 Mya — about 0.2 occurrences6.6–3.6 Mya — about 0.1 occurrences89.8 Mya15.98 Mya96 Mya4 Mya

43 occurrences of Hyotissa semiplana on record, most of them in the Late Cretaceous. 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

43 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

13 formations

opoka — 51.32°N, 21.95°Eopoka — 51.15°N, 21.72°Eopoka — 51.00°N, 21.00°EBilá — 49.98°N, 15.60°EDuwi — 30.05°N, 31.25°ESekule — 8.91°N, 12.00°ESekule — 9.73°N, 11.82°EMaastricht — 51.00°N, 6.00°EGreensand — 51.33°N, 21.97°EMaastrichtian chalk — 56.97°N, 9.68°ESärdal Beds — 56.75°N, 12.63°EUgod — 46.98°N, 17.28°EFat'ha — 36.43°N, 44.35°EGlauconie de Lonzée — 50.55°N, 4.73°EAwgu Limestone — 6.08°N, 7.47°EMungo River — 7.74°N, 8.50°E

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The named rock units Hyotissa semiplana has been recovered from, largest first. Drawn where the rock is now, not where it formed. 22 occurrences have no formation on record, which is common for older literature.

Hyotissa semiplana and its relatives

Late Cretaceous

Where Hyotissa semiplana and its relatives were recorded in the Late Cretaceous.

Found in the same rock

544 taxa

The Paleobiology Database records 35 sites for Hyotissa semiplana, 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

17 references

Each of the 43 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. 5 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 content1

Picture of Hyotissa semiplana

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

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

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 itHyotissa through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Sowerby 1825)