Hemicalypterus weiri

Gibson SZ (2016) · CC BY-SA 4.0 · via Wikidata/Commons. 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
- HemicalypterusPBDB
- Diet
- durophage, carnivorePBDB, for Semionotiformes
- Life habit
- nektonicPBDB, for Semionotiformes
- Motility
- actively mobilePBDB, for Semionotiformes
Time the record covers
At least 21 million years on record.
The record covers at least 227.3 Mya to 205.7 Mya. No occurrence read is dated outside 237 Mya to 201.4 Mya.
3 occurrences of Hemicalypterus weiri on record, most of them in the Late Triassic. 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
3 occurrences- Late Triassic100%
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
2 formations
- Chinle Formation2
- Tecovas Formation · Chinle Group1
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The named rock units Hemicalypterus weiri has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Hemicalypterus weiri and its relatives
Late TriassicWhere Hemicalypterus weiri and its relatives were recorded in the Late Triassic.
Found in the same rock
34 taxa- Chinlea sorenseni2 sites
- Cionichthys dunklei2 sites
- Lasalichthys hillsi2 sites
- Lasalichthys stewarti2 sites
- Lophionotus sanjuanensis2 sites
- Redfieldiidae2 sites
- Semionotus2 sites
- Turseodus2 sites
- Aetosauria1 site
- Anaschisma browni1 site
- Apachesaurus gregorii1 site
- Arganodus dorotheae1 site
- Calyptosuchus wellesi1 site
- Cionichthys1 site
- Colobodontidae1 site
- Diplostraca1 site
- Gastropoda1 site
- Lasalichthys1 site
- Lophionotus chinleana1 site
- Neoselachii1 site
- Orectolobiformes1 site
- Ostracoda1 site
- Plesioelliptio sp.1 site
- Postosuchus1 site
The Paleobiology Database records 3 sites for Hemicalypterus weiri, 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
3 references- Reinvestigation of Late Triassic fish sites in the Chinle Group, San Juan County, Utah: new discoveries1
- Vertebrate paleontology of the Dockum Group, western Texas and eastern New Mexico1
- Late Triassic fishes from the western United States1
Each of the 3 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. Each entry links to the Paleobiology Database's own record for the work.
Media and terms
Media content1

Picture of Hemicalypterus weiri
- Source
- Wikidata/Commons
- Credit
- Gibson SZ (2016)
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Hemicalypterus weiri 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 itHemicalypterus through timeFormations of the Late TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Schaeffer 1967