Hemisphaeranthos

Hemisphaeranthos is an extinct genus of sea cucumbers. The following species are recognised in the genus Hemisphaeranthos:†Hemisphaeranthos costifera Terquem & Berthelin, 1875 †Hemisphaeranthos elegans (Schlumberger, 1888) †Hemisphaeranthos frankei (Müller, 1912) †Hemisphaeranthos simplex A.H. Müller, 1964

Hemisphaeranthos

Ben Thuy, Andy Gale, Andreas Kroh, Sabine Stöhr · CC BY 4.0 · 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
MyriotrochidaePBDB
Diet
detritivorePBDB, for Apodida
Life habit
epifaunalPBDB, for Apodida
Motility
actively mobilePBDB, for Apodida
Vision
blindPBDB, for Holothuroidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 96 million years on record.

The record covers at least 168.2 Mya to 72.2 Mya. No occurrence read is dated outside 170.9 Mya to 66 Mya.

Middle Jurassic — about 3 of 5 occurrencesMiddle JurassicLate Jurassic — about 0 of 5 occurrencesEarly Cretaceous — about 0 of 5 occurrencesLate Cretaceous — about 2 of 5 occurrencesLate CretaceousPaleocene — about 0 of 5 occurrences173–169 Mya — about 0.6 occurrences169–166 Mya — about 2 occurrences166–162 Mya — about 0.3 occurrences97–93 Mya — about 0.2 occurrences93–89 Mya — about 0.8 occurrences75–71 Mya — about 0.2 occurrences71–68 Mya — about 0.6 occurrences68–64 Mya — about 0.2 occurrences168.2 Mya72.2 Mya173 Mya64 Mya

5 occurrences of Hemisphaeranthos 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

5 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

1 formation

White Chalk — 54.52°N, 13.63°E

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The named rock units Hemisphaeranthos has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Hemisphaeranthos and its relatives

Middle Jurassic

Where Hemisphaeranthos and its relatives were recorded in the Middle Jurassic.

Found in the same rock

219 taxa

The Paleobiology Database records 5 sites for Hemisphaeranthos, 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

5 references

Each of the 5 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 content1

Picture of Hemisphaeranthos

Credit
Ben Thuy, Andy Gale, Andreas Kroh, Sabine Stöhr
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Hemisphaeranthos was found in MorphoSource and Sketchfab.

Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.

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 itMyriotrochidae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Terquem and Berthelin 1875