Dielasma
Searched as Dielasma elongatum orientalis n. ssp.. The Paleobiology Database treats Dielasma 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
- DielasmatinaePBDB
- Diet
- suspension feederPBDB, for Terebratulida
- Life habit
- low-level epifaunalPBDB, for Terebratulida
- Motility
- stationaryPBDB, for Terebratulida
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At most 2.7 million years on record.
The one occurrence read is dated to somewhere between 266.9 Mya and 264.28 Mya, which is a dating window rather than a span.
1 occurrence of Dielasma on record, most of them in the Permian. 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- Permian100%
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
Loading coastlines…
The named rock units Dielasma has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Dielasma and its relatives
PermianWhere Dielasma and its relatives were recorded in the Permian.
Found in the same rock
2,095 taxa- Cleiothyridina58 sites
- Crinoidea53 sites
- Bryozoa49 sites
- Fenestella39 sites
- Punctospirifer39 sites
- Platycrinites38 sites
- Rugosochonetes38 sites
- Ovatia37 sites
- Spirifer37 sites
- Marginatia35 sites
- Composita34 sites
- Xestotrema pulchrum33 sites
- Grandaurispina29 sites
- Aviculopecten27 sites
- Echinauris subhorrida27 sites
- Hustedia27 sites
- Cladochonus26 sites
- Cypricardinia26 sites
- Schuchertella26 sites
- Chonetes22 sites
- Composita mira22 sites
- Stenoscisma22 sites
- Ctenalosia fixata21 sites
- Protoniella21 sites
The Paleobiology Database records 801 sites for Dielasma, 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 Dielasma
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Dielasma 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itDielasmatinae through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Beede and Rogers 1900)