Thelodus

Thelodus is an extinct genus of thelodont agnathan that lived during the Silurian period. Fossils have been found in Europe, Asia and North America.

Thelodus

Apokryltaros · CC BY-SA 4.0 · 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
CoelolepidaePBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At least 19 million years on record.

The record covers at least 440.5 Mya to 421.3 Mya. No occurrence read is dated outside 443.1 Mya to 419.62 Mya.

Ordovician — about 0 of 293 occurrencesSilurian — about 293 of 293 occurrencesSilurianDevonian — about 0 of 293 occurrences444–443 Mya — about 0.2 occurrences443–442 Mya — about 0.4 occurrences442–441 Mya — about 0.4 occurrences441–440 Mya — about 0.3 occurrences440–440 Mya — about 0.1 occurrences440–439 Mya — about 0.1 occurrences439–438 Mya — about 0.2 occurrences438–437 Mya — about 0.2 occurrences437–436 Mya — about 0.2 occurrences436–435 Mya — about 0.2 occurrences435–435 Mya — about 0.2 occurrences435–434 Mya — about 0.2 occurrences434–433 Mya — about 0.2 occurrences433–432 Mya — about 1 occurrence432–431 Mya — about 1 occurrence431–431 Mya — about 2 occurrences431–430 Mya — about 2 occurrences430–429 Mya — about 2 occurrences429–428 Mya — about 4 occurrences428–427 Mya — about 5 occurrences427–426 Mya — about 7 occurrences426–426 Mya — about 12 occurrences426–425 Mya — about 18 occurrences425–424 Mya — about 38 occurrences424–423 Mya — about 38 occurrences423–422 Mya — about 58 occurrences422–422 Mya — about 28 occurrences422–421 Mya — about 30 occurrences421–420 Mya — about 31 occurrences420–419 Mya — about 12 occurrences440.5 Mya421.3 Mya443.6 Mya419.1 Mya

293 occurrences of Thelodus on record, most of them in the Silurian. 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

293 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

60 formations

Whitcliffe — 52.37°N, 2.72°WWhitcliffe — 52.53°N, 2.63°WWhitcliffe — 52.45°N, 2.72°WWhitcliffe — 52.07°N, 2.35°WWhitcliffe — 51.58°N, 1.87°WWhitcliffe — 52.45°N, 2.12°WWhitcliffe — 51.70°N, 2.45°WWhitcliffe — 52.05°N, 2.57°WWhitcliffe — 52.93°N, 4.37°WUpper Whitcliffe — 52.93°N, 4.37°WUpper Whitcliffe — 52.47°N, 1.88°WUpper Whitcliffe — 52.37°N, 2.70°WUpper Whitcliffe — 52.05°N, 2.70°WUpper Whitcliffe — 52.05°N, 2.57°WDownton Castle Sandstone — 52.37°N, 2.73°WDownton Castle Sandstone — 52.57°N, 2.48°WDownton Castle Sandstone — 52.20°N, 3.00°WDownton Castle Sandstone — 52.00°N, 3.00°WDownton Castle Sandstone — 52.45°N, 2.12°WDownton Castle Sandstone — 52.93°N, 4.37°WDownton Castle Sandstone — 52.05°N, 2.70°WDownton Castle Sandstone — 52.47°N, 1.88°WLudlow Bone Bed — 51.96°N, 3.74°WLudlow Bone Bed — 52.00°N, 2.52°WLudlow Bone Bed — 52.03°N, 2.63°WLudlow Bone Bed — 52.54°N, 2.62°WLudlow Bone Bed — 52.47°N, 2.73°WLudlow Bone Bed — 52.27°N, 2.38°WLudlow Bone Bed — 52.43°N, 3.01°WTahula — 58.36°N, 22.86°ETahula — 58.36°N, 23.86°ETahula — 58.13°N, 24.00°ETahula — 58.31°N, 22.61°ETahula — 58.25°N, 22.49°ETahula — 58.00°N, 22.03°EPagegiai — 56.89°N, 21.20°ELower Whitcliffe — 52.37°N, 2.70°WElton — 52.55°N, 2.03°WElton — 52.37°N, 2.70°WHimmiste — 59.07°N, 24.79°EHimmiste — 58.27°N, 21.96°ECausemountain — 51.22°N, 2.22°WKudjape — 58.27°N, 22.52°EKudjape — 58.00°N, 22.03°EVesiku Beds — 59.07°N, 24.79°EUst'-Spokojnaya — 79.50°N, 96.00°EHalla — 57.61°N, 18.80°EViita Beds — 59.07°N, 24.79°EUduvere Beds — 59.07°N, 24.79°EClun Forest — 52.52°N, 2.63°WUpper Bringewood — 52.37°N, 2.72°WUpper Bringewood — 52.35°N, 2.87°WLeintwardine — 52.40°N, 2.78°WBringewood — 52.45°N, 2.12°WBringewood — 51.70°N, 2.45°WSauvere — 59.07°N, 24.79°ELoo Beds — 59.07°N, 24.79°ESamojlovich — 79.50°N, 97.00°ECunningham Creek — 45.38°N, 66.32°W

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The named rock units Thelodus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 36 further formations hold fewer occurrences each and are not listed. 20 occurrences have no formation on record, which is common for older literature.

Thelodus and its relatives

Silurian

Where Thelodus and its relatives were recorded in the Silurian.

Found in the same rock

289 taxa

The Paleobiology Database records 110 sites for Thelodus, 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

28 references

Each of the 293 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. 16 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 Thelodus

Credit
Apokryltaros
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Thelodus 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.

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 itCoelolepidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Agassiz 1839)