Isochilina

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
- IsochilinidaePBDB
- Diet
- detritivorePBDB, for Leperditicopida
- Life habit
- epifaunalPBDB, for Leperditicopida
- Motility
- actively mobilePBDB, for Ostracoda
- Vision
- limitedPBDB, for Leperditicopida
- Environment
- marinePBDB, for Ostracoda
Time the record covers
At least 51 million years on record.
The record covers at least 471.3 Mya to 419.62 Mya. No occurrence read is dated outside 486.85 Mya to 413.02 Mya.
69 occurrences of Isochilina 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
69 occurrences- Ordovician93%
- Silurian6%
- Devonian1%
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
26 formations
- Witten Limestone Formation8
- Wardell Formation6
- Eggleston Formation6
- Gratton Limestone Formation5
- Antelope Valley Formation · Pogonip Group4
- Aylmer Formation · Chazy Group4
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The named rock units Isochilina has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 further formations hold fewer occurrences each and are not listed. 11 occurrences have no formation on record, which is common for older literature.
Isochilina and its relatives
OrdovicianWhere Isochilina and its relatives were recorded in the Ordovician.
Found in the same rock
502 taxa- Leperditella24 sites
- Tetradium17 sites
- Batostoma15 sites
- Leperditia15 sites
- Orthoceras15 sites
- Graptodictya14 sites
- Pachydictya14 sites
- Strophomena incurvata13 sites
- Cryptophragmus antiquatus12 sites
- Escharopora subrecta12 sites
- Hormotoma12 sites
- Illaenus12 sites
- Omospira laticincta12 sites
- Prismostylus fibratum12 sites
- Krausella10 sites
- Rafinesquina alternata10 sites
- Anazyga recurvirostra9 sites
- Eoleperditia9 sites
- Eurychilina9 sites
- Hallopora9 sites
- Rhynchotrema9 sites
- Vanuxemia9 sites
- Calyptaulax8 sites
- Calyptaulax callicephalus8 sites
The Paleobiology Database records 67 sites for Isochilina, 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
23 references- Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia25
- Zonation of the Middle and Upper Ordovician strata in northwestern Georgia7
- Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada5
- The Chazy Formation and its fauna5
- Pre-Chattanooga stratigraphy in Central Tennessee4
- Middle Ordovician (Whiterockian) trilobite Bathyurus angelini Billings 1859 from the Carillon Formation (uppermost Beekmantown Group) at Kahnawake, Quebec, and correlative trilobites from eastern Canada3
- Middle Ordovician ostracoda from southwestern District of Mackenzie2
- Geology of the Bristol and Wallace quadrangles, Virginia2
- Dutchtown fauna of southeastern Missouri2
- Macropaleontological investigation of the Upper St. George Group, West Isthmus Bay to East Bay section, Port au Port Peninsula, Western Newfoundland1
- Habitat of Llandoverian-Lochkovian eurypterids1
- The occurrence of pelecypods in early Paleozoic epeiric-sea environments, Late Ordovician of the Cincinnati, Ohio area1
Each of the 69 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. 11 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 Isochilina
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Isochilina 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 itIsochilinidae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Jones 1858)