Plesiosiro madeleyi

Plesiosiro is an extinct arachnid genus known exclusively from nine specimens from the Upper Carboniferous of Coseley, West Midlands, United Kingdom. The genus is monotypic, represented only by the species Plesiosiro madeleyi described by Reginald Innes Pocock in his important 1911 monograph on British Carboniferous arachnids. It is the only known member of the order Haptopoda.

Plesiosiro madeleyi

Junnn11 · 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
PlesiosiroPBDB
Life habit
solitaryPBDB, for Arachnida
Motility
actively mobilePBDB, for Arachnida
Environment
terrestrialPBDB, for Arachnida

Time the record covers

At most 2.3 million years on record.

Every occurrence read is dated to somewhere between 316.9 Mya and 314.6 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Carboniferous — about 6 of 6 occurrencesCarboniferous317–317 Mya — about 0.1 occurrences317–317 Mya — about 0.3 occurrences317–317 Mya — about 0.3 occurrences317–317 Mya — about 0.3 occurrences317–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–316 Mya — about 0.3 occurrences316–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.3 occurrences315–315 Mya — about 0.1 occurrences317.4 Mya314.1 Mya

6 occurrences of Plesiosiro madeleyi on record, most of them in the Carboniferous. 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

6 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.

Plesiosiro madeleyi and its relatives

Carboniferous

Where Plesiosiro madeleyi and its relatives were recorded in the Carboniferous.

Found in the same rock

35 taxa

The Paleobiology Database records 6 sites for Plesiosiro madeleyi, 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

3 references

Each of the 6 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 Plesiosiro madeleyi

Credit
Junnn11
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Plesiosiro madeleyi 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 itPlesiosiro through timeFormations of the CarboniferousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Pocock 1911