Dielasma

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 least 182 million years on record.
The record covers at least 387.95 Mya to 205.7 Mya. No occurrence read is dated outside 393.47 Mya to 201.4 Mya.
1,037 occurrences 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
1,037 occurrences- Devonianunder 1%
- Carboniferous21%
- Permian77%
- Early Triassicunder 1%
- Middle Triassicunder 1%
- Late Triassic1%
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
200 formations
- Word Formation71
- Bell Canyon Formation65
- Road Canyon Formation47
- Ford Formation46
- Gerster Formation · Park City Group35
- Wargal Formation33
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The named rock units Dielasma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 176 further formations hold fewer occurrences each and are not listed. 125 occurrences have no formation on record, which is common for older literature.
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
209 references- Permian Brachiopods of West Texas, VI294
- Brachiopoda and Mollusca from the Productus limestones of the Salt Range59
- Verkhnekamennougol'nyya Brakhiopody Urala i Timana38
- The biostratigraphy and paleoecology of the Gerster Limestone (Upper Permian) in Nevada and Utah35
- Paleontology and paleoecology of the Crawfordsville fossil site (Upper Osagian: Indiana)24
- Geology and mineral deposits of southeastern Alaska23
- Zechstein reef fossils and their palaeoecology20
- The Geology of the Glass Mountains, Texas, Part II, Faunal summary and correlation of the Permian formations with description of Brachiopoda18
- Monograph of the Permian fossils of England18
- Paleoecology and Paleocommunity Analysis of Green Shale Faunas from the Fort Payne Formation (Lower Mississippian) of South-central Kentucky and North-central Tennessee14
- The Paradise Formation and its fauna14
- The brachiopods and the boundary of Late Carboniferous-Early Permian in Longlin region, Guangxi12
Each of the 1,037 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. 197 further references are not listed. 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 Dielasma
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Dielasma was found in Smithsonian Open Access and Sketchfab.
MorphoSource 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)