Archinacella

Yale Peabody Museum · CC0 · via GBIF. 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
- ArchinacellidaePBDB
- Diet
- grazerPBDB, for Archinacellida
- Life habit
- epifaunalPBDB, for Archinacellida
- Motility
- actively mobilePBDB, for Archinacellida
- Vision
- blindPBDB, for Tergomya
Time the record covers
At least 38 million years on record.
The record covers at least 486.85 Mya to 448.8 Mya. No occurrence read is dated outside 490.2 Mya to 443.1 Mya.
117 occurrences of Archinacella 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
117 occurrences- Cambrianunder 1%
- Ordovician99%
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
57 formations
- Crown Point Formation · Chazy Group7
- Decorah Formation7
- Lexington Limestone Formation6
- Day Point Formation · Chazy Group6
- Nicolet River Formation4
- Kope Formation3
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The named rock units Archinacella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 33 further formations hold fewer occurrences each and are not listed. 4 occurrences have no formation on record, which is common for older literature.
Archinacella and its relatives
OrdovicianWhere Archinacella and its relatives were recorded in the Ordovician.
Found in the same rock
1,291 taxa- Hormotoma gracilis23 sites
- Ctenodonta22 sites
- Lophospira perangulata22 sites
- Modiolopsis22 sites
- Cyrtodonta21 sites
- Clathrospira subconica18 sites
- Cyrtodontula18 sites
- Sinuites cancellatus18 sites
- Orthodesma14 sites
- Tetranota sexcarinata14 sites
- Vanuxemia14 sites
- Clathrospira conica13 sites
- Eunema centralis13 sites
- Nuculites13 sites
- Paraliospira supracingulata13 sites
- Rafinesquina alternata13 sites
- Similodonta13 sites
- Tetranota obsoleta13 sites
- Cymatonota12 sites
- Lophospira serrulata12 sites
- Lyrodesma12 sites
- Palaeoneilo12 sites
- Salpingostoma buelli12 sites
- Fusispira spicula11 sites
The Paleobiology Database records 106 sites for Archinacella, 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
42 references- Stratigraphic ranges of Middle and Late Ordovician Gastropoda and Monoplacophora of Minnesota15
- The Chazy Formation and its fauna14
- Upper Ordovician faunas of Ontario and Quebec13
- The Lower Silurian Gastropoda of Minnesota13
- The fossil fauna of the Ordovician in the Cincinnati Region5
- Isostrophic molluscs (Tergomya and Gastropoda) from the Upper Ordovician of Norway4
- Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region4
- Lithostratigraphy and depositional environments of the Lexington Limestone (Ordovician) of central Kentucky4
- The Richmond Formation of Michigan3
- The Ordovician succession from the western Iberian Ranges (NE Spain): a review with new data2
- Evolution, succession & replacement in the type Caradoc (Ordovician) benthic faunas of England2
- Taphonomy and taxonomy of the early Ordovician gastropod Ceratopea canadensis (Billings), 18652
Each of the 117 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. 30 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 Archinacella
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Archinacella 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 itArchinacellidae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ulrich and Scofield 1897