Furca

Furca is an extinct genus of marrellomorph arthropod known from the Sandbian stage of the Czech Republic, with a single currently described species, Furca bohemica. A tentative additional species, "Furca mauretanica" was proposed for specimens discovered in Morocco, but this species remains a nomen nudum until formally published, and probably belongs in a new separate genus.

Furca

Štěpán Rak, Javier Ortega−Hernández, David A. Legg · 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
MimetasteridaePBDB
Motility
actively mobilePBDB, for Arthropoda

Time the record covers

At least 11 million years on record.

The record covers at least 471.3 Mya to 459.7 Mya. No occurrence read is dated outside 477.1 Mya to 457.2 Mya.

Ordovician — about 3 of 3 occurrencesOrdovician478–477 Mya — about 0.0 occurrences477–476 Mya — about 0.1 occurrences476–476 Mya — about 0.1 occurrences476–475 Mya — about 0.1 occurrences475–474 Mya — about 0.1 occurrences474–473 Mya — about 0.1 occurrences473–473 Mya — about 0.1 occurrences473–472 Mya — about 0.1 occurrences472–471 Mya — about 0.1 occurrences471–471 Mya — about 0.0 occurrences464–463 Mya — about 0.1 occurrences463–462 Mya — about 0.1 occurrences462–462 Mya — about 0.1 occurrences462–461 Mya — about 0.1 occurrences461–460 Mya — about 0.1 occurrences460–459 Mya — about 0.2 occurrences459–459 Mya — about 0.4 occurrences459–458 Mya — about 0.4 occurrences458–457 Mya — about 0.4 occurrences457–457 Mya — about 0.1 occurrences471.3 Mya459.7 Mya477.6 Mya456.7 Mya

3 occurrences of Furca 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

3 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

2 formations

Letna — 50.00°N, 14.00°EFezouata — 30.50°N, 5.85°W

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The named rock units Furca has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Furca and its relatives

Ordovician

Where Furca and its relatives were recorded in the Ordovician.

Found in the same rock

108 taxa

The Paleobiology Database records 3 sites for Furca, 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 3 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 content2

Picture of Furca

Credit
Štěpán Rak, Javier Ortega−Hernández, David A. Legg
Licence
CC BY 2.0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Aphareus furca · UWFC:ADULT COLLECTION:UW 009226

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 itMimetasteridae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Fritsch 1908