Chaulistomella

Not Chaulistomella. This is Chaulistomella Cooper, 1956, a relative — both are Plaesiomyidae.
Retallack, Gregory · 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
- PlaesiomyinaePBDB
- Diet
- suspension feederPBDB, for Plaesiomyidae
- Life habit
- epifaunalPBDB, for Plaesiomyidae
- Motility
- stationary, attachedPBDB, for Plaesiomyidae
- Vision
- blindPBDB, for Rhynchonellata
- Environment
- marinePBDB, for Lophophorata
Time the record covers
At least 5.4 million years on record.
The record covers at least 458.2 Mya to 452.8 Mya. No occurrence read is dated outside 471.3 Mya to 445.2 Mya.
26 occurrences of Chaulistomella 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
26 occurrences- Ordovician100%
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
10 formations
- Bromide Formation6
- Esbataottine Formation6
- Gur'yanovka Formation5
- Tekhten Formation2
- Ridley Limestone Formation1
- Xiayan Formation1
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The named rock units Chaulistomella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Chaulistomella and its relatives
OrdovicianWhere Chaulistomella and its relatives were recorded in the Ordovician.
Found in the same rock
298 taxa- Rostricellula10 sites
- Ceratocephala triacantheis6 sites
- Dolichoharpes reticulata6 sites
- Holia glabra6 sites
- Onychoplesia sp.6 sites
- Tetradella6 sites
- Walencrinuroides rolfi6 sites
- Calyptaulax5 sites
- Colaptomena5 sites
- Eurychilina5 sites
- Mimella5 sites
- Sowerbyella5 sites
- Acanthoparypha4 sites
- Amphilichas4 sites
- Aphelognathus4 sites
- Boreadorthis4 sites
- Ceraurinella4 sites
- Dimeropyge speyeri4 sites
- Heliomeroides teres4 sites
- Mimella globosa4 sites
- Pandaspinapyga4 sites
- Phorocephala4 sites
- Phragmodus undatus4 sites
- Sphaerexochus4 sites
The Paleobiology Database records 22 sites for Chaulistomella, 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
9 references- Ordovician Sedimentary Basin and Paleobiotas of the Gorny Altai7
- Biostratigraphic and paleontological studies6
- Ordovician formations and faunas, southern Mackenzie Mountains3
- A trilobite zonation of Middle Ordovician rocks, southwestern District of Mackenzie2
- Silicified Middle Ordovician trilobites from the South Nahanni River Area, District of Mackenzie, Canada2
- Middle and Lower Ordovician Formations in Southernmost Nevada and Adjacent California2
- Chazyan and related brachiopods2
- Synoptic revision of the Ordovician brachiopods of the Barr and Lower Ardmillan groups of the Girvan area, Scotland1
- Regional stratigraphic tables of the north western China region: Volume of NinXia Province1
Each of the 26 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. 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 Chaulistomella Cooper, 1956
- Source
- GBIF
- Credit
- Retallack, Gregory
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Chaulistomella was found in MorphoSource and Sketchfab.
Smithsonian Open Access 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 itPlaesiomyinae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cooper 1956