Archaeorthis

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
- ArchaeorthidaePBDB
- Diet
- suspension feederPBDB, for Orthida
- Life habit
- epifaunalPBDB, for Orthida
- Motility
- stationary, attachedPBDB, for Orthida
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At least 28 million years on record.
The record covers at least 486.85 Mya to 458.2 Mya. No occurrence read is dated outside 497 Mya to 449.5 Mya.
65 occurrences of Archaeorthis on record, most of them in the Ordovician. 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
65 occurrences- Cambrian4%
- Ordovician96%
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
22 formations
- Ninemile Formation · Pogonip Group21
- Cape Weber Formation5
- Bugryshikha Formation4
- Voskresenka Formation4
- Smithville Formation4
- San Juan Formation2
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The named rock units Archaeorthis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.
Archaeorthis and its relatives
OrdovicianWhere Archaeorthis and its relatives were recorded in the Ordovician.
Found in the same rock
417 taxa- Ptyocephalus11 sites
- Hesperonomia8 sites
- Illaenus6 sites
- Leptella nevadensis6 sites
- Presbynileus6 sites
- Batostoma5 sites
- Batostoma implicatum5 sites
- Eorobergia5 sites
- Eridotrypa5 sites
- Fascifera subcarinata5 sites
- Hebertella5 sites
- Helicotoma5 sites
- Homotrypa5 sites
- Homotrypa subramosa5 sites
- Hormotoma gracilis5 sites
- Hypsiptycha argenturbicum5 sites
- Idiostrophia5 sites
- Leperditia5 sites
- Lophospira5 sites
- Mimella borealis5 sites
- Orthoceras5 sites
- Pachydictya5 sites
- Petigurus groenlandicus5 sites
- Prismostylus fibratum5 sites
The Paleobiology Database records 64 sites for Archaeorthis, 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
26 references- Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada10
- Middle and Lower Ordovician Formations in Southernmost Nevada and Adjacent California8
- Ordovician Sedimentary Basin and Paleobiotas of the Gorny Altai7
- Zonation of the Middle and Upper Ordovician strata in northwestern Georgia5
- On the Lower Ordovician faunas of East Greenland5
- A New Upper Canadian Fauna from a Deep Well in Tennessee4
- Mid Ordovician (Darriwilian) brachiopods of South Kazakhstan3
- Llandeylovskiye brakhiopodovye kompleksy Mongolskogo i Gornogo Altaya. Llandeilian brachiopods assemblages of Mongolian and Gorny Altai.3
- The acrotretacean brachiopod Ceratreta tanneri (Metzger) from the Upper Cambrian of Baltoscandia2
- Some Middle Ordovician Brachiopods and Trilobites from the Basin Ranges, Western United States2
- Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen1
- Trilobites of the Tremadoc Bjørkåsholmen Formation in the Oslo Region, Norway1
Each of the 65 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. 14 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 Archaeorthis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itArchaeorthidae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Schuchert and Cooper 1931