Axius

Axius is a genus of mud lobster containing the following species:Axius armatus S. I. Smith, 1881 †Axius hofstedtae Hyžný, Jakobsen & Fraaije, 2017 †Axius lineadactylus †Axius reticulatus Rathbun, 1918 Axius serratus Stimpson, 1852 Axius stirynchus Leach, 1815 †Axius texensis

Axius

Uncredited · Public Domain · 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
AxiidaePBDB
Diet
detritivorePBDB, for Axiidea
Life habit
infaunalPBDB, for Axiidae
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 100 million years on record.

The record covers at least 100.5 Mya to 129 ka. No occurrence read is dated outside 106.3 Mya to 11.7 ka.

Early Cretaceous — about 1 of 8 occurrencesLate Cretaceous — about 0 of 8 occurrencesPaleocene — about 0 of 8 occurrencesEocene — about 0 of 8 occurrencesOligocene — about 3 of 8 occurrencesOligoceneMiocene — about 1 of 8 occurrencesMiocenePliocene — about 2 of 8 occurrencesPleistocene — about 1 of 8 occurrences108–105 Mya — about 0.3 occurrences105–101 Mya — about 0.6 occurrences101–98 Mya — about 0.1 occurrences36–33 Mya — about 0.2 occurrences33–29 Mya — about 0.5 occurrences29–25 Mya — about 1 occurrence25–22 Mya — about 2 occurrences22–18 Mya — about 0.5 occurrences7.2–3.6 Mya — about 2 occurrences3.6–0 Mya — about 1 occurrence100.5 Mya129 ka108 Mya0 Mya

8 occurrences of Axius on record, most of them in the Oligocene. The Paleobiology Database records this as a living group. 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

8 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

5 formations

Vejlefjord — 56.64°N, 9.08°EVejlefjord — 56.68°N, 9.13°EKishima — 33.37°N, 129.93°EOosterhout — 51.70°N, 5.73°EPawpaw — 32.85°N, 97.29°WCulebra — 9.76°N, 79.68°W

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The named rock units Axius has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Axius and its relatives

Oligocene

Where Axius and its relatives were recorded in the Oligocene.

Found in the same rock

134 taxa

The Paleobiology Database records 7 sites for Axius, 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

5 references

Each of the 8 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 Axius

Credit
nobody named on the record
Licence
Public Domain
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 itAxiidae through timeFormations of the OligoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Leach 1816