Pachygrapsus

Pachygrapsus is a genus of small shore crabs. Recent genetic data suggest this genus to be possibly polyphyletic.

Pachygrapsus

matt knoth from San Francisco, yesicannibus · 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
GrapsidaePBDB
Diet
detritivorePBDB, for Grapsoidea
Life habit
epifaunalPBDB, for Grapsoidea
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 12 million years on record.

The record covers at least 12.8 Mya to 11.7 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 11 occurrencesMiocene — about 6 of 11 occurrencesMiocenePliocene — about 0 of 11 occurrencesPliocenePleistocene — about 2 of 11 occurrencesPleistocene24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.0 occurrences22–21 Mya — about 0.0 occurrences21–20 Mya — about 0.0 occurrences20–20 Mya — about 0.0 occurrences20–19 Mya — about 0.0 occurrences19–18 Mya — about 0.0 occurrences18–17 Mya — about 0.0 occurrences17–16 Mya — about 0.0 occurrences16–16 Mya — about 0.0 occurrences16–15 Mya — about 0.0 occurrences15–14 Mya — about 0.0 occurrences14–13 Mya — about 2 occurrences13–13 Mya — about 3 occurrences13–12 Mya — about 0.4 occurrences12–11 Mya — about 0.1 occurrences11–10 Mya — about 0.0 occurrences10–9.4 Mya — about 0.0 occurrences9.4–8.6 Mya — about 0.0 occurrences8.6–7.8 Mya — about 0.0 occurrences7.8–7.1 Mya — about 0.0 occurrences7.1–6.3 Mya — about 0.0 occurrences6.3–5.5 Mya — about 0.0 occurrences5.5–4.7 Mya — about 0.0 occurrences4.7–3.9 Mya — about 0.0 occurrences3.9–3.1 Mya — about 0.0 occurrences3.1–2.4 Mya — about 0.0 occurrences785 ka–0 Mya — about 5 occurrences12.8 Mya11.7 ka23.5 Mya0 Mya

11 occurrences of Pachygrapsus on record, most of them in the Miocene. 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

11 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

Discovery Point — 29.10°N, 118.25°WFalmouth — 18.48°N, 77.45°W

Loading coastlines…

The named rock units Pachygrapsus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 occurrences have no formation on record, which is common for older literature.

Pachygrapsus and its relatives

Miocene

Where Pachygrapsus and its relatives were recorded in the Miocene.

Found in the same rock

214 taxa

The Paleobiology Database records 9 sites for Pachygrapsus, 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

8 references

Each of the 11 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 Pachygrapsus

Credit
matt knoth from San Francisco, yesicannibus
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Pachygrapsus 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 itGrapsidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Randall 1839