Gymnusa

Gymnusa is a genus of rove beetles in the subfamily Aleocharinae and tribe Gymnusini. The coloration of this genus is highly coherent, with most species black and a few dark, dark brown. They range in length from 4.2 millimeters to 6.5 millimeters.

Gymnusa

Reginald Webster, Jan Klimaszewski, Georges Pelletier, Karine Savard · CC BY 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
GymnusiniPBDB
Motility
actively mobilePBDB, for Arthropoda
Environment
terrestrialPBDB, for Insecta

Time the record covers

At most 118 thousand years on record.

Every occurrence read is dated to somewhere between 129 ka and 11.7 ka, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Pleistocene — about 10 of 10 occurrencesPleistoceneHolocene — about 0 of 10 occurrences147 ka–126 ka Mya — about 0.3 occurrences126 ka–105 ka Mya — about 2 occurrences105 ka–84 ka Mya — about 2 occurrences84 ka–63 ka Mya — about 2 occurrences63 ka–42 ka Mya — about 2 occurrences42 ka–21 ka Mya — about 2 occurrences21 ka–0 Mya — about 0.8 occurrences629 ka0 Mya

10 occurrences of Gymnusa on record, most of them in the Pleistocene. 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

10 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

Titusville Till — 41.62°N, 79.64°WScarborough — 43.70°N, 79.24°W

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The named rock units Gymnusa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Gymnusa and its relatives

Pleistocene

Where Gymnusa and its relatives were recorded in the Pleistocene.

Found in the same rock

259 taxa

The Paleobiology Database records 10 sites for Gymnusa, 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 10 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 Gymnusa

Credit
Reginald Webster, Jan Klimaszewski, Georges Pelletier, Karine Savard
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan of Gymnusa 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 itGymnusini through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gravenhorst 1806