Eunicida

Eunicida is an order of polychaete worms.

Eunicida

Jenny · CC BY 2.0 · via Wikipedia/Commons. 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
PolychaetaPBDB
Diet
detritivorePBDB, for Polychaeta
Life habit
epifaunalPBDB, for Polychaeta
Motility
actively mobilePBDB, for Polychaeta
Vision
limitedPBDB, for Polychaeta

Time the record covers

At least 206 million years on record.

The record covers at least 449.9 Mya to 243.43 Mya. No occurrence read is dated outside 452.8 Mya to 241.464 Mya.

Ordovician — about 66 of 270 occurrencesSilurian — about 195 of 270 occurrencesSilurianDevonian — about 2 of 270 occurrencesDevonianCarboniferous — about 4 of 270 occurrencesCarboniferousPermian — about 1 of 270 occurrencesPermianEarly Triassic — about 0 of 270 occurrencesMiddle Triassic — about 2 of 270 occurrences457–450 Mya — about 25 occurrences450–442 Mya — about 41 occurrences442–435 Mya — about 8 occurrences435–428 Mya — about 47 occurrences428–420 Mya — about 139 occurrences420–413 Mya — about 0.3 occurrences413–406 Mya — about 0.4 occurrences406–398 Mya — about 0.6 occurrences391–384 Mya — about 1 occurrence362–354 Mya — about 1 occurrence354–347 Mya — about 0.7 occurrences332–325 Mya — about 1 occurrence325–318 Mya — about 0.9 occurrences289–281 Mya — about 0.2 occurrences281–274 Mya — about 0.8 occurrences245–237 Mya — about 2 occurrences449.9 Mya243.43 Mya457 Mya237 Mya

270 occurrences of Eunicida on record, most of them in the Silurian. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

270 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

35 formations

Kopanina — 49.94°N, 14.05°EKopanina — 49.96°N, 14.17°EHemse Beds — 57.53°N, 18.43°EVaureal — 49.83°N, 64.40°WHogklint Beds — 57.53°N, 18.43°EHogklint Beds — 57.83°N, 18.50°EHulderstad — 58.84°N, 24.98°EMoe — 58.84°N, 24.98°ESlite Beds — 57.72°N, 18.80°ESaunja — 58.84°N, 24.98°EKorgessaare — 58.84°N, 24.98°EEke Beds — 57.17°N, 18.38°ELower Visby Beds — 57.63°N, 18.30°EHalla Beds — 57.53°N, 18.43°EMulde Beds — 57.53°N, 18.43°EKlinteberg Beds — 57.53°N, 18.43°EUpper Visby Beds — 57.63°N, 18.30°EHamra Beds — 57.53°N, 18.43°EEllis Bay — 49.84°N, 64.45°WLower Visby — 57.81°N, 18.45°EWaynesville — 39.45°N, 83.83°WBurgsvik Beds — 57.05°N, 18.27°EKhkoma — 67.04°N, 103.77°EKhaastyrka — 67.32°N, 103.85°EKhaastyrka — 67.33°N, 104.85°EKhaastyrka — 67.34°N, 103.88°ENew Albany Shale — 38.67°N, 85.67°WSundre Beds — 57.53°N, 18.43°E

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The named rock units Eunicida has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 further formations hold fewer occurrences each and are not listed.

Eunicida and its relatives

Silurian

Where Eunicida and its relatives were recorded in the Silurian.

Found in the same rock

588 taxa

The Paleobiology Database records 67 sites for Eunicida, 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

19 references

Each of the 270 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. 7 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 Eunicida

Credit
Jenny
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Eunicida 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.

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itPolychaeta through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ushakov 1955