Anomura

Anomura is a group of decapod crustaceans, including hermit crabs and others. Several groups such as the king crabs and porcelain crabs within the Anomura have independently undergone carcinisation, acquiring the armoured crab body plan with a concealed tail. It is the sister group to the "true crabs" or Brachyura.

Anomura

by Was a bee · 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
MeiuraPBDB
Diet
carnivorePBDB, for Decapoda
Life habit
epifaunalPBDB, for Decapoda
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 201 million years on record.

The record covers at least 201.4 Mya to 11.7 ka. No occurrence read is dated outside 211.18 Mya to 0 Mya.

Late Triassic — about 1 of 799 occurrencesEarly Jurassic — about 28 of 799 occurrencesEarly JurassicMiddle Jurassic — about 16 of 799 occurrencesLate Jurassic — about 110 of 799 occurrencesLate JurassicEarly Cretaceous — about 59 of 799 occurrencesEarly CretaceousLate Cretaceous — about 59 of 799 occurrencesLate CretaceousPaleocene — about 25 of 799 occurrencesEocene — about 211 of 799 occurrencesEoceneOligocene — about 38 of 799 occurrencesMiocene — about 142 of 799 occurrencesMiocenePliocene — about 31 of 799 occurrencesPleistocene — about 22 of 799 occurrences215–208 Mya — about 0.3 occurrences208–201 Mya — about 1.0 occurrences201–194 Mya — about 4 occurrences194–187 Mya — about 14 occurrences187–180 Mya — about 8 occurrences180–172 Mya — about 3 occurrences172–165 Mya — about 6 occurrences165–158 Mya — about 20 occurrences158–151 Mya — about 17 occurrences151–144 Mya — about 75 occurrences144–136 Mya — about 8 occurrences136–129 Mya — about 2 occurrences129–122 Mya — about 7 occurrences122–115 Mya — about 8 occurrences115–108 Mya — about 8 occurrences108–101 Mya — about 34 occurrences101–93 Mya — about 13 occurrences93–86 Mya — about 3 occurrences86–79 Mya — about 12 occurrences79–72 Mya — about 13 occurrences72–65 Mya — about 23 occurrences65–57 Mya — about 16 occurrences57–50 Mya — about 59 occurrences50–43 Mya — about 67 occurrences43–36 Mya — about 58 occurrences36–29 Mya — about 57 occurrences29–22 Mya — about 18 occurrences22–14 Mya — about 33 occurrences14–7.2 Mya — about 84 occurrences7.2–0 Mya — about 130 occurrences201.4 Mya11.7 ka215 Mya0 Mya

799 occurrences of Anomura on record, most of them in the Eocene. 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

799 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

142 formations

Ernstbrunn — 48.54°N, 16.36°EEguino — 42.88°N, 2.20°WSerraduy — 42.32°N, 0.54°EAmaltheenton — 49.62°N, 11.06°EAmaltheenton — 49.27°N, 11.46°EAmaltheenton — 49.79°N, 11.04°EAmaltheenton — 48.85°N, 9.99°EAmaltheenton — 48.65°N, 9.46°EAmaltheenton — 48.54°N, 9.28°EAmaltheenton — 48.65°N, 9.20°ECercado — 19.48°N, 71.17°WCercado — 19.58°N, 71.04°WCercado — 19.46°N, 71.10°WPierre Shale — 40.92°N, 105.05°WPierre Shale — 40.77°N, 105.07°WPierre Shale — 40.72°N, 105.07°WPierre Shale — 40.73°N, 105.03°WPierre Shale — 40.52°N, 105.07°WPierre Shale — 40.73°N, 105.17°WUpper Coralline Limestone — 35.93°N, 14.33°EUpper Coralline Limestone — 35.92°N, 14.38°EOxford Clay — 52.33°N, 0.09°WOxford Clay — 52.55°N, 0.24°WOxford Clay — 52.55°N, 0.20°WBateque — 26.54°N, 112.75°WBateque — 26.93°N, 113.08°WBateque — 26.91°N, 113.04°WBateque — 24.17°N, 110.92°WBateque — 26.42°N, 112.58°WBateque — 26.95°N, 113.06°WSanta Marta — 63.91°S, 57.81°WSanta Marta — 63.87°S, 57.90°WCastelgomberto — 45.50°N, 11.40°ECastelgomberto — 45.58°N, 11.38°ECastelgomberto — 45.53°N, 11.48°ECalcareniti di Castelgomberto — 45.43°N, 11.52°EBasilika — 78.10°N, 14.53°EBasilika — 78.11°N, 14.60°EBasilika — 78.07°N, 14.28°EPinczow — 50.47°N, 20.80°EUntere Felsenkalke — 47.93°N, 8.67°EMaastricht — 50.84°N, 5.78°EMaastricht — 50.82°N, 5.68°ESan Juan — 16.14°N, 92.78°WSan Juan — 16.73°N, 93.14°WGlen Rose Limestone — 29.73°N, 99.06°WGlen Rose Limestone — 30.20°N, 98.38°WGlen Rose Limestone — 29.87°N, 98.73°WGlen Rose Limestone — 29.95°N, 98.76°WSandakan — 5.86°N, 118.04°ESandakan — 5.88°N, 118.06°EMarno-Calcaires à Oolites Ferrugineuses — 47.89°N, 4.51°ECayo Agua — 9.14°N, 82.01°WCayo Agua — 9.17°N, 82.04°WNdalithoni Limestone — 17.23°S, 178.95°EAkrabou — 30.51°N, 4.84°WNdalithoni — 17.24°S, 178.94°W

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The named rock units Anomura has been recovered from, largest first. Drawn where the rock is now, not where it formed. 118 further formations hold fewer occurrences each and are not listed. 441 occurrences have no formation on record, which is common for older literature.

Anomura and its relatives

Eocene

Where Anomura and its relatives were recorded in the Eocene.

Found in the same rock

2,956 taxa

The Paleobiology Database records 332 sites for Anomura, and this reads 240 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

223 references

Each of the 799 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. 211 further references are not listed. 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 Anomura

Credit
by Was a bee
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Anomura was found in Sketchfab.

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 itMeiura through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Milne-Edwards 1832