Parahughmilleria

Parahughmilleria is a genus of eurypterid, an extinct group of aquatic arthropods. Fossils of Parahughmilleria have been discovered in deposits of the Devonian and Silurian age in the United States, Canada, Russia, Germany, Luxembourg, China and Great Britain, and have been referred to several different species. The first fossils of Parahughmilleria, discovered in the Shawangunk Mountains in 1907, were initially assigned to Eurypterus. It would not be until 54 years later when Parahughmilleria would be described.

Parahughmilleria

Super Dromaeosaurus · 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
ParahughmilleriidaePBDB
Diet
carnivorePBDB, for Eurypterida
Life habit
nektobenthicPBDB, for Eurypterida
Motility
actively mobilePBDB, for Eurypterida
Vision
well-developedPBDB, for Eurypterida

Time the record covers

At least 22 million years on record.

The record covers at least 432.9 Mya to 410.62 Mya. No occurrence read is dated outside 443.1 Mya to 387.95 Mya.

Ordovician — about 0 of 20 occurrencesSilurian — about 9 of 20 occurrencesSilurianDevonian — about 11 of 20 occurrencesDevonian444–442 Mya — about 0.2 occurrences442–440 Mya — about 0.4 occurrences440–438 Mya — about 0.5 occurrences438–437 Mya — about 0.8 occurrences437–435 Mya — about 0.8 occurrences435–433 Mya — about 0.8 occurrences433–431 Mya — about 0.4 occurrences431–429 Mya — about 0.4 occurrences429–427 Mya — about 0.4 occurrences427–425 Mya — about 0.7 occurrences425–423 Mya — about 0.7 occurrences423–421 Mya — about 1 occurrence421–419 Mya — about 2 occurrences419–417 Mya — about 1 occurrence417–416 Mya — about 1 occurrence416–414 Mya — about 1 occurrence414–412 Mya — about 1 occurrence412–410 Mya — about 0.9 occurrences410–408 Mya — about 0.8 occurrences408–406 Mya — about 0.8 occurrences406–404 Mya — about 0.8 occurrences404–402 Mya — about 0.8 occurrences402–400 Mya — about 0.8 occurrences400–398 Mya — about 0.5 occurrences398–396 Mya — about 0.3 occurrences396–394 Mya — about 0.3 occurrences394–393 Mya — about 0.2 occurrences393–391 Mya — about 0.1 occurrences391–389 Mya — about 0.1 occurrences389–387 Mya — about 0.0 occurrences432.9 Mya410.62 Mya444 Mya387 Mya

20 occurrences of Parahughmilleria on record, most of them in the Devonian. 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

20 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

Shawangunk — 40.98°N, 75.14°WShawangunk — 41.47°N, 74.54°WMatarak — 54.12°N, 91.43°EMatarak — 53.33°N, 90.00°ERose Hill — 40.66°N, 76.36°WMifflintown — 40.96°N, 76.61°WWills Creek — 38.95°N, 79.00°WDownton Castle Sandstone — 52.37°N, 2.73°WTemeside Shale — 52.37°N, 2.73°WDundee Flagstone — 56.67°N, 2.77°WKlerf — 50.25°N, 6.46°EZub or Kureika — 74.00°N, 95.00°ECampbellton — 48.08°N, 66.42°WXiaxishancun — 25.51°N, 103.70°E

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The named rock units Parahughmilleria has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Parahughmilleria and its relatives

Devonian

Where Parahughmilleria and its relatives were recorded in the Devonian.

Found in the same rock

79 taxa

The Paleobiology Database records 17 sites for Parahughmilleria, 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

9 references

Each of the 20 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. 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 Parahughmilleria

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

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itParahughmilleriidae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.