Isoptychus

No picture of Isoptychus was found. Wikidata and iDigBio were searched and had none. Wikipedia and Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Isoptychus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
TheridomyinaePBDB
Diet
herbivorePBDB, for Rodentia
Life habit
ground dwellingPBDB, for Theridomyidae
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Theridomyidae

Time the record covers

At most 11 million years on record.

Every occurrence read is dated to somewhere between 37.71 Mya and 27.3 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Eocene — about 28 of 31 occurrencesEoceneOligocene — about 3 of 31 occurrencesOligocene38–37 Mya — about 2 occurrences37–37 Mya — about 3 occurrences37–37 Mya — about 3 occurrences37–36 Mya — about 3 occurrences36–36 Mya — about 3 occurrences36–36 Mya — about 3 occurrences36–35 Mya — about 3 occurrences35–35 Mya — about 3 occurrences35–34 Mya — about 3 occurrences34–34 Mya — about 3 occurrences34–34 Mya — about 1 occurrence34–33 Mya — about 0.2 occurrences33–33 Mya — about 0.2 occurrences33–33 Mya — about 0.2 occurrences33–32 Mya — about 0.2 occurrences32–32 Mya — about 0.2 occurrences32–31 Mya — about 0.2 occurrences31–31 Mya — about 0.2 occurrences31–31 Mya — about 0.2 occurrences31–30 Mya — about 0.2 occurrences30–30 Mya — about 0.2 occurrences30–29 Mya — about 0.2 occurrences29–29 Mya — about 0.2 occurrences29–29 Mya — about 0.2 occurrences29–28 Mya — about 0.2 occurrences28–28 Mya — about 0.2 occurrences28–28 Mya — about 0.2 occurrences28–27 Mya — about 0.1 occurrences38.2 Mya26.8 Mya

31 occurrences of Isoptychus 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

31 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

6 formations

Bembridge Limestone — 50.67°N, 1.55°WBembridge Limestone — 50.67°N, 1.53°WLower Headon Beds — 50.63°N, 1.55°WLower Headon Beds — 50.67°N, 1.10°WLower Headon Beds — 50.67°N, 1.53°WUpper Headon Beds — 50.63°N, 1.55°WBembridge Marls — 50.68°N, 1.09°WBembridge Marls — 50.75°N, 1.33°WHeadon Hill — 50.72°N, 1.22°WLower Hamstead Beds — 50.70°N, 1.50°W

Loading coastlines…

The named rock units Isoptychus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 occurrences have no formation on record, which is common for older literature.

Isoptychus and its relatives

Eocene

Where Isoptychus and its relatives were recorded in the Eocene.

Found in the same rock

106 taxa

The Paleobiology Database records 25 sites for Isoptychus, 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

7 references

Each of the 31 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 content0

No picture of Isoptychus was found. Wikidata and iDigBio were searched and had none.

Wikipedia and Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Isoptychus, or no answer at all. This entry cannot say which.

No 3D scan of Isoptychus 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 itTheridomyinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Pomel 1853