Sismondia

Sismondia

via iDigBio · 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
Sits inside
LaganidaePBDB
Diet
detritivorePBDB, for Clypeasteroida
Life habit
semi-infaunalPBDB, for Clypeasteroida
Motility
slow-movingPBDB, for Clypeasteroida
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 40 million years on record.

The record covers at least 41.03 Mya to 129 ka. No occurrence read is dated outside 48.07 Mya to 11.7 ka.

Eocene — about 7 of 12 occurrencesEoceneOligocene — about 2 of 12 occurrencesOligoceneMiocene — about 2 of 12 occurrencesMiocenePliocene — about 0 of 12 occurrencesPleistocene — about 1 of 12 occurrences49–47 Mya — about 0.4 occurrences47–46 Mya — about 1 occurrence46–44 Mya — about 1 occurrence44–42 Mya — about 1 occurrence42–41 Mya — about 0.9 occurrences41–39 Mya — about 0.3 occurrences39–38 Mya — about 0.4 occurrences38–36 Mya — about 0.9 occurrences36–34 Mya — about 0.9 occurrences34–33 Mya — about 0.4 occurrences33–31 Mya — about 0.2 occurrences31–29 Mya — about 0.2 occurrences29–28 Mya — about 0.2 occurrences28–26 Mya — about 0.3 occurrences26–25 Mya — about 0.4 occurrences25–23 Mya — about 0.3 occurrences13–11 Mya — about 0.0 occurrences11–9.8 Mya — about 0.4 occurrences9.8–8.2 Mya — about 0.4 occurrences8.2–6.5 Mya — about 0.4 occurrences6.5–4.9 Mya — about 0.4 occurrences4.9–3.3 Mya — about 0.3 occurrences1.6–0 Mya — about 1 occurrence41.03 Mya129 ka49 Mya0 Mya

12 occurrences of Sismondia on record, most of them in the Eocene. 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

12 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

9 formations

Thebes — 26.10°N, 34.10°EEtchegoin — 36.10°N, 120.32°WEtchegoin — 35.96°N, 120.01°WMinia — 30.86°N, 27.91°EWadi Tamet — 28.88°N, 18.87°EAl Jir — 30.94°N, 15.50°EAntigua — 17.17°N, 61.85°WAshawaq — 17.00°N, 53.00°EViștea Limestone — 46.85°N, 23.20°EPalos Verdes Sand — 33.64°N, 117.88°W

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The named rock units Sismondia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Sismondia and its relatives

Eocene

Where Sismondia and its relatives were recorded in the Eocene.

Found in the same rock

251 taxa

The Paleobiology Database records 11 sites for Sismondia, 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

10 references

Each of the 12 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 Sismondia

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Sismondia was found in Sketchfab.

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

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

Keep going

What may have been alongside itLaganidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Desor 1858