Homarus

Homarus is a genus of lobsters which includes the common and commercially significant species Homarus americanus and Homarus gammarus. The Cape lobster, which was formerly in this genus as H. capensis, was moved in 1995 to the new genus Homarinus.

Homarus

Bart Braun · 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
NephropidaePBDB
Diet
carnivorePBDB, for Decapoda
Life habit
infaunalPBDB, for Nephropoidea
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 123 million years on record.

The record covers at least 125.77 Mya to 2.58 Mya. No occurrence read is dated outside 143.1 Mya to 11.7 ka.

Late Jurassic — about 0 of 27 occurrencesEarly Cretaceous — about 6 of 27 occurrencesEarly CretaceousLate Cretaceous — about 14 of 27 occurrencesLate CretaceousPaleocene — about 0 of 27 occurrencesEocene — about 1 of 27 occurrencesEoceneOligocene — about 0 of 27 occurrencesMiocene — about 4 of 27 occurrencesMiocenePliocene — about 0 of 27 occurrencesPleistocene — about 2 of 27 occurrences146–141 Mya — about 0.0 occurrences141–136 Mya — about 0.1 occurrences136–131 Mya — about 0.3 occurrences131–127 Mya — about 0.8 occurrences127–122 Mya — about 0.2 occurrences122–117 Mya — about 0.7 occurrences117–112 Mya — about 0.8 occurrences112–107 Mya — about 2 occurrences107–102 Mya — about 1 occurrence102–97 Mya — about 5 occurrences97–92 Mya — about 6 occurrences92–88 Mya — about 2 occurrences88–83 Mya — about 0.1 occurrences83–78 Mya — about 0.4 occurrences78–73 Mya — about 0.4 occurrences73–68 Mya — about 0.1 occurrences58–54 Mya — about 0.3 occurrences54–49 Mya — about 0.6 occurrences49–44 Mya — about 0.1 occurrences19–15 Mya — about 0.3 occurrences15–9.7 Mya — about 2 occurrences9.7–4.9 Mya — about 2 occurrences4.9–0 Mya — about 2 occurrences125.77 Mya2.58 Mya146 Mya0 Mya

27 occurrences of Homarus on record, most of them in the Late Cretaceous. 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

27 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

10 formations

Britton — 32.00°N, 96.00°WBritton — 32.54°N, 97.07°WEagle Ford — 33.19°N, 96.91°WGram — 55.28°N, 9.00°EGram — 55.31°N, 9.06°EElm Fork Shale — 32.87°N, 96.93°WEntre Rios — 33.72°S, 59.25°WMancos Shale — 36.55°N, 110.48°WLondon Clay — 51.51°N, 0.24°EWalnut Clay — 30.00°N, 97.00°WSables d'Anvers — 51.13°N, 4.29°EPierre Shale — 44.78°N, 103.90°W

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The named rock units Homarus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 occurrences have no formation on record, which is common for older literature.

Homarus and its relatives

Late Cretaceous

Where Homarus and its relatives were recorded in the Late Cretaceous.

Found in the same rock

189 taxa

The Paleobiology Database records 15 sites for Homarus, 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 27 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 content3

Picture of Homarus

Credit
Bart Braun
Licence
Public Domain
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Homarus americanus · ha2_0.5um_tertiary_organule:0.5um:voxel_slices

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itNephropidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Weber 1795