Tetradellidae

Tetradellidae

via iDigBio · CC BY-NC-SA · 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
HollinaceaPBDB
Diet
suspension feederPBDB, for Palaeocopida
Life habit
epifaunalPBDB, for Palaeocopida
Motility
actively mobilePBDB, for Ostracoda
Vision
limitedPBDB, for Ostracoda
Environment
marinePBDB, for Ostracoda

Time the record covers

At least 82 million years on record.

The record covers at least 475.6 Mya to 393.47 Mya. No occurrence read is dated outside 482.9 Mya to 387.95 Mya.

Ordovician — about 486 of 492 occurrencesOrdovicianSilurian — about 4 of 492 occurrencesSilurianDevonian — about 2 of 492 occurrencesDevonian485–482 Mya — about 0.2 occurrences482–478 Mya — about 0.5 occurrences478–475 Mya — about 0.8 occurrences475–472 Mya — about 3 occurrences472–468 Mya — about 28 occurrences468–465 Mya — about 9 occurrences465–462 Mya — about 11 occurrences462–458 Mya — about 93 occurrences458–455 Mya — about 115 occurrences455–452 Mya — about 105 occurrences452–449 Mya — about 96 occurrences449–445 Mya — about 20 occurrences445–442 Mya — about 4 occurrences439–435 Mya — about 2 occurrences435–432 Mya — about 2 occurrences396–393 Mya — about 0.3 occurrences393–389 Mya — about 1 occurrence389–386 Mya — about 0.5 occurrences475.6 Mya393.47 Mya485 Mya386 Mya

492 occurrences of Tetradellidae 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

492 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

107 formations

Ust'Stolbovaya — 62.14°N, 91.56°EUst'Stolbovaya — 62.14°N, 91.49°EUst'Stolbovaya — 62.30°N, 92.12°EDecorah Shale — 44.00°N, 92.00°WDecorah Shale — 46.00°N, 94.00°WWhittaker — 62.00°N, 127.00°WWhittaker — 61.52°N, 124.87°WWhittaker — 62.47°N, 124.85°WWhittaker — 63.28°N, 125.35°WWhittaker — 61.48°N, 125.05°WWhittaker — 62.46°N, 124.88°WWhittaker — 62.50°N, 125.25°WFfairfach Flags and Grits — 52.00°N, 4.00°WDunleith — 42.00°N, 94.00°WHuk — 64.93°N, 11.90°EHuk — 59.92°N, 10.73°EHuk — 59.77°N, 10.48°EHuk — 59.92°N, 10.78°EHuk — 59.82°N, 9.56°EHuk — 59.91°N, 10.64°EIon — 42.00°N, 94.00°WDalby — 57.00°N, 17.00°EDalby — 58.00°N, 15.00°EDalby — 61.00°N, 15.00°EDalby — 58.00°N, 14.00°EDalby — 58.00°N, 12.00°ELexington Limestone — 38.00°N, 84.67°WLiben — 50.00°N, 14.00°ELiben — 49.72°N, 13.57°ELiben — 49.80°N, 13.63°ELiben — 49.82°N, 13.70°ELiben — 49.68°N, 13.47°ELiben — 49.83°N, 13.83°EFurudal — 58.00°N, 15.00°EFurudal — 60.91°N, 15.02°EFurudal — 61.05°N, 15.20°EFurudal — 60.92°N, 15.09°ECummingsville — 46.00°N, 94.00°WVolkhov — 59.82°N, 32.20°EFlags and Grits — 52.00°N, 4.00°WSegerstad Limestone — 57.00°N, 17.00°ESegerstad Limestone — 58.00°N, 15.00°EGuttenberg — 42.00°N, 94.00°WEsbataottine — 62.00°N, 127.00°WEsbataottine — 61.63°N, 125.73°WEsbataottine — 61.72°N, 125.93°WEsbataottine — 62.52°N, 124.78°WCwm Rhiwarth — 53.00°N, 3.00°WVinice — 50.00°N, 14.00°EVinice — 59.95°N, 14.00°ESpechts Ferry — 42.00°N, 94.00°WFort Atkinson Limestone — 42.00°N, 94.00°WBrainard Shale — 42.00°N, 94.00°WFonte da Horta — 41.00°N, 8.00°WFonte da Horta — 40.00°N, 8.00°WFfairfach Ashes and Lavas — 52.00°N, 4.00°W

Loading coastlines…

The named rock units Tetradellidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 83 further formations hold fewer occurrences each and are not listed. 59 occurrences have no formation on record, which is common for older literature.

Tetradellidae and its relatives

Ordovician

Where Tetradellidae and its relatives were recorded in the Ordovician.

Found in the same rock

1,638 taxa

The Paleobiology Database records 271 sites for Tetradellidae, and this reads 240 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

65 references

Each of the 492 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. 53 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 Tetradellidae

Source
iDigBio
Credit
via iDigBio
Licence
CC BY-NC-SA
Commercial use
the licence does not allow it

No 3D scan of Tetradellidae 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 itHollinacea through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Swartz 1936