Isorthis
Searched as Isorthis (Ovalella) natiscoteki. The Paleobiology Database treats Isorthis as the accepted name.

via iDigBio · CC0 · 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
- IsorthinaePBDB
- Diet
- suspension feederPBDB, for Dalmanellidae
- Life habit
- epifaunalPBDB, for Dalmanellidae
- Motility
- stationary, attachedPBDB, for Dalmanellidae
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At most 2.6 million years on record.
The one occurrence read is dated to somewhere between 443.1 Mya and 440.5 Mya, which is a dating window rather than a span.
1 occurrence of Isorthis on record, most of them in the Silurian. 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
1 occurrences- Silurian100%
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
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The named rock units Isorthis has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Isorthis and its relatives
SilurianWhere Isorthis and its relatives were recorded in the Silurian.
Found in the same rock
1,886 taxa- Atrypa90 sites
- Howellella77 sites
- Dalejina69 sites
- Atrypa reticularis65 sites
- Leptaena63 sites
- Bryozoa59 sites
- Gypidula52 sites
- Rugosa51 sites
- Crinoidea50 sites
- Resserella50 sites
- Nucleospira48 sites
- Skenidioides48 sites
- Eospirifer42 sites
- Gastropoda41 sites
- Favosites40 sites
- Meristina38 sites
- Trilobita37 sites
- Strophonella36 sites
- Cyrtia34 sites
- Delthyris34 sites
- Sphaerirhynchia34 sites
- Bivalvia32 sites
- Craniops31 sites
- Dicoelosia29 sites
The Paleobiology Database records 501 sites for Isorthis, 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
1 referenceEach of the 1 occurrence 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1

Picture of Isorthis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Isorthis 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 itIsorthinae through timeFormations of the SilurianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Kozlowski 1929