Hemithiris
Hemithiris is a genus of brachiopods belonging to the family Hemithirididae.

Erin McKittrick · CC BY 4.0 · via Wikipedia/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
- HemithirididaePBDB
- Diet
- suspension feederPBDB, for Rhynchonellida
- Life habit
- epifaunalPBDB, for Rhynchonellida
- Motility
- stationaryPBDB, for Rhynchonellida
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At least 48 million years on record.
The record covers at least 48.07 Mya to 11.7 ka. No occurrence read is dated outside 66 Mya to 0 Mya.
41 occurrences of Hemithiris on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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
41 occurrencesThese 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
19 formations
- Taya Formation5
- La Meseta Formation4
- Blakeley Formation3
- Crescent Formation2
- Junicho Formation2
- Quimper Formation2
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The named rock units Hemithiris has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 occurrences have no formation on record, which is common for older literature.
Hemithiris and its relatives
PleistoceneWhere Hemithiris and its relatives were recorded in the Pleistocene.
Found in the same rock
290 taxa- Hemithyris psittacea11 sites
- Coptothyris grayi8 sites
- Terebratalia coreanica5 sites
- Terebratalia gouldii5 sites
- Terebratulina crossei5 sites
- Laqueus rubellus4 sites
- Magella australis4 sites
- Balanus3 sites
- Balanus crenatus3 sites
- Chlamys (Chlamys) islandica3 sites
- Cryptonatica affinis3 sites
- Diestothyris frontalis3 sites
- Hiatella arctica3 sites
- Laqueus japonicus3 sites
- Liracassis rex3 sites
- Macoma (Macoma) calcarea3 sites
- Magellania antarctica3 sites
- Mya (Mya) truncata3 sites
- Mytilus edulis3 sites
- Puncturella noachina3 sites
- Terebratulina japonica3 sites
- Terebratulina yabei3 sites
- Acila (Acila) gettysburgensis2 sites
- Acirsa borealis2 sites
The Paleobiology Database records 25 sites for Hemithiris, 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
14 references- The Cenozoic Brachiopoda of Japan15
- Megafaunal zones of the Oligocene of northwestern Washington5
- Brachiopods from the Eocene La Meseta Formation of Seymour Island, Antarctic Peninsula4
- Quaternary marine stratigraphy and geochronology in central West Greenland3
- Paleontology and stratigraphy of Eocene rocks at Pulali Point, Jefferson County, Olympic Peninsula, Washington2
- Tertiary and Cretaceous brachiopods from Seymour, Cockburn and James Ross Islands, Antarctica2
- Contributions to the Quaternary geology of northern West Greenland especially the raised marine deposits2
- Paleontology of the Marine Tertiary formations of Oregon and Washington2
- Brown bear (Ursus arctos) (9880 ± 35 BP) from late-glacial Champlain Sea deposits at Saint-Nicolas, Quebec, Canada, and the dispersal history of brown bears1
- Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions1
- Marine paleoclimatology and paleoecology of a Pleistocene invertebrate fauna from Amchitka Island, Aleutian Islands, Alaska1
- Late Pleistocene marine paleoecology and zoogeography on Central California1
Each of the 41 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. 2 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 Hemithiris
- Source
- Wikipedia/Commons
- Credit
- Erin McKittrick
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Source
- Wikipedia, “Hemithiris”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itHemithirididae through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. d'Orbigny 1847