Macrophthalmus

Macrophthalmus is a genus of crabs which are widespread across the Indo-Pacific. It contains the following species : Species in this genus are often referred to as sentinel crabs.

Macrophthalmus

ISAKA Yoji ( cory ) [ Recent works / Other works ] · CC BY-SA 3.0 · 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
MacrophthalminaePBDB
Diet
detritivorePBDB, for Ocypodoidea
Life habit
infaunalPBDB, for Ocypodoidea
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 5.3 million years on record.

The record covers at least 5.333 Mya to 11.7 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 26 occurrencesMiocene — about 12 of 26 occurrencesMiocenePliocene — about 2 of 26 occurrencesPliocenePleistocene — about 9 of 26 occurrencesPleistocene24–23 Mya — about 0.2 occurrences23–22 Mya — about 0.5 occurrences22–21 Mya — about 0.5 occurrences21–20 Mya — about 0.5 occurrences20–20 Mya — about 0.5 occurrences20–19 Mya — about 0.5 occurrences19–18 Mya — about 0.5 occurrences18–17 Mya — about 0.5 occurrences17–16 Mya — about 0.5 occurrences16–16 Mya — about 0.5 occurrences16–15 Mya — about 0.5 occurrences15–14 Mya — about 0.5 occurrences14–13 Mya — about 0.5 occurrences13–13 Mya — about 0.5 occurrences13–12 Mya — about 0.5 occurrences12–11 Mya — about 0.5 occurrences11–10 Mya — about 0.5 occurrences10–9.4 Mya — about 0.5 occurrences9.4–8.6 Mya — about 0.5 occurrences8.6–7.8 Mya — about 0.5 occurrences7.8–7.1 Mya — about 0.5 occurrences7.1–6.3 Mya — about 0.5 occurrences6.3–5.5 Mya — about 0.5 occurrences5.5–4.7 Mya — about 0.1 occurrences3.9–3.1 Mya — about 0.9 occurrences3.1–2.4 Mya — about 2 occurrences2.4–1.6 Mya — about 2 occurrences1.6–785 ka Mya — about 2 occurrences785 ka–0 Mya — about 8 occurrences5.333 Mya11.7 ka23.5 Mya0 Mya

26 occurrences of Macrophthalmus on record. 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

26 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

Nakoji — 26.62°N, 128.10°EFuruya — 34.70°N, 128.20°E

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The named rock units Macrophthalmus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 24 occurrences have no formation on record, which is common for older literature.

Found in the same rock

43 taxa

The Paleobiology Database records 10 sites for Macrophthalmus, 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

12 references

Each of the 26 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 Macrophthalmus

Credit
ISAKA Yoji ( cory ) [ Recent works / Other works ]
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

Smithsonian Open Access and MorphoSource were 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 itMacrophthalminae through timeThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Latreille 1823