Euchasma

No picture of Euchasma was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Euchasma, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
EopteriidaePBDB
Diet
suspension feederPBDB, for Rostroconchia
Life habit
semi-infaunalPBDB, for Rostroconchia
Motility
stationaryPBDB, for Rostroconchia
Vision
blindPBDB, for Rostroconchia

Time the record covers

At least 44 million years on record.

The record covers at least 497 Mya to 452.3 Mya. No occurrence read is dated outside 499 Mya to 449 Mya.

Cambrian — about 10 of 48 occurrencesCambrianOrdovician — about 38 of 48 occurrencesOrdovician500–498 Mya — about 0.4 occurrences498–497 Mya — about 0.6 occurrences490–488 Mya — about 3 occurrences488–486 Mya — about 7 occurrences486–484 Mya — about 3 occurrences484–483 Mya — about 2 occurrences483–481 Mya — about 3 occurrences481–479 Mya — about 3 occurrences479–477 Mya — about 3 occurrences477–476 Mya — about 3 occurrences476–474 Mya — about 4 occurrences474–472 Mya — about 4 occurrences472–471 Mya — about 4 occurrences471–469 Mya — about 3 occurrences469–467 Mya — about 2 occurrences467–465 Mya — about 0.7 occurrences465–464 Mya — about 0.7 occurrences464–462 Mya — about 0.7 occurrences462–460 Mya — about 0.6 occurrences460–458 Mya — about 0.5 occurrences458–457 Mya — about 0.1 occurrences453–451 Mya — about 0.3 occurrences451–450 Mya — about 0.5 occurrences450–448 Mya — about 0.2 occurrences497 Mya452.3 Mya500 Mya448 Mya

48 occurrences of Euchasma 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

48 occurrences

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

12 formations

Catoche — 48.55°N, 59.25°WCatoche — 51.63°N, 55.90°WCatoche — 48.51°N, 59.22°WCatoche — 50.72°N, 57.37°WCatoche — 50.73°N, 57.35°WCatoche — 48.54°N, 58.74°WCatoche — 50.74°N, 57.22°WCatoche — 50.76°N, 57.22°WCatoche — 50.37°N, 57.53°WNinmaroo — 22.88°S, 138.45°ENinmaroo — 21.98°S, 140.05°ENinmaroo — 22.15°S, 140.15°ENinmaroo — 22.04°S, 140.02°ENinmaroo — 21.93°S, 140.10°ENinmaroo — 22.10°S, 140.07°ENinmaroo — 22.53°S, 140.35°ENinmaroo — 23.05°S, 139.23°ECoolibah — 22.63°S, 138.35°ECoolibah — 15.55°S, 130.96°ECoolibah — 22.52°S, 137.13°ECoolibah — 22.58°S, 137.92°ECoolibah — 22.66°S, 137.84°ELower Setul — 6.42°N, 99.95°ELower Setul — 6.37°N, 99.97°ELower Setul — 6.44°N, 99.81°ECroisaphuill — 58.62°N, 4.87°WCroisaphuill — 58.52°N, 4.80°WCroisaphuill — 58.60°N, 4.83°WWan-wan-kou — 38.35°N, 125.43°ERockdale Run — 37.78°N, 79.51°WRockdale Run — 38.31°N, 79.74°WRomaine — 50.30°N, 64.05°WMungerebar — 22.92°S, 138.80°EGordon Limestone — 41.90°S, 145.34°ELuke Hill Limestone — 45.04°N, 73.07°WHølonda — 63.13°N, 9.98°E

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The named rock units Euchasma has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Euchasma and its relatives

Ordovician

Where Euchasma and its relatives were recorded in the Ordovician.

Found in the same rock

175 taxa

The Paleobiology Database records 47 sites for Euchasma, 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

13 references

Each of the 48 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. 1 further reference is 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 content0

No picture of Euchasma was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Euchasma, or no answer at all. This entry cannot say which.

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 itEopteriidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Billings 1865