Euconia

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
- SinuopeidaePBDB
- Life habit
- epifaunalPBDB, for Gastropoda
- Motility
- actively mobilePBDB, for Gastropoda
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 11 million years on record.
The record covers at least 486.85 Mya to 475.3 Mya. No occurrence read is dated outside 490.2 Mya to 457.3 Mya.
49 occurrences of Euconia 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
49 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
- Roubidoux Formation8
- Deadwood Formation6
- Catoche Formation · St. George Group5
- Croisaphuill Formation · Durness Group4
- Gorman Formation3
- Honeycut Formation · Ellenburger Group3
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The named rock units Euconia has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Euconia and its relatives
OrdovicianWhere Euconia and its relatives were recorded in the Ordovician.
Found in the same rock
242 taxa- Syntrophina10 sites
- Hystricurus8 sites
- Euchasma blumenbachi6 sites
- Apatokephalus4 sites
- Ceratopea canadensis4 sites
- Eocrinoidea4 sites
- Hormotoma4 sites
- Lecanospira4 sites
- Lingulella4 sites
- Plethospira4 sites
- Cassinoceras wortheni3 sites
- Catochia ornata3 sites
- Dakeoceras3 sites
- Diaphelasma3 sites
- Drepanodus3 sites
- Ellesmeroceras3 sites
- Gasconadia putilla3 sites
- Ischyrotoma anataphra3 sites
- Lecanospira compacta3 sites
- Lophospira perangulata3 sites
- Maclurites3 sites
- Nanorthis putilla3 sites
- Ophileta3 sites
- Petigurus nero3 sites
The Paleobiology Database records 43 sites for Euconia, 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 and paleontology of the Roubidoux Formation of Missouri8
- The geological structure of the north-west Highlands of Scotland6
- Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023)5
- New gastropods and trilobites critical in the correlation of Lower Ordovician rocks4
- Lower Ordovician (Arenig) faunas from the Williston Basin, Montana and North Dakota3
- The rostroconch mollusc Euchasma Billings, 1865 from the Lower Ordovician Catoche Formation, western Newfoundland2
- Ordovician gastropods from Western Newfoundland2
- Regional Stratigraphic Table of North China2
- Stratigraphy of Upper Cambrian-Lower Ordovician Subsurface Sequence in Williston Basin2
- Palaeozoic fossils, volume 12
- Continuing Stratigraphic and Trilobite Studies of the Watts Bight Formation (St. George Group), Port au Port Peninsula, Western Newfoundland1
- Macropaleontological investigation of the Upper St. George Group, West Isthmus Bay to East Bay section, Port au Port Peninsula, Western Newfoundland1
Each of the 49 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 Euconia
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Euconia 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 itSinuopeidae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ulrich and Scofield 1897