Gerris

Gerris is an insect genus in the family Gerridae.

Gerris

James K. Lindsey · 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
Also called
water striderPBDB
Sits inside
GerrinaePBDB
Motility
actively mobilePBDB, for Arthropoda
Environment
terrestrialPBDB, for Insecta

Time the record covers

At least 40 million years on record.

The record covers at least 41.03 Mya to 129 ka. No occurrence read is dated outside 48.07 Mya to 11.7 ka.

Eocene — about 4 of 6 occurrencesEoceneOligocene — about 1 of 6 occurrencesOligoceneMiocene — about 0 of 6 occurrencesPliocene — about 0 of 6 occurrencesPleistocene — about 1 of 6 occurrences49–47 Mya — about 0.2 occurrences47–46 Mya — about 0.5 occurrences46–44 Mya — about 0.5 occurrences44–42 Mya — about 0.5 occurrences42–41 Mya — about 0.4 occurrences39–38 Mya — about 0.1 occurrences38–36 Mya — about 0.9 occurrences36–34 Mya — about 0.9 occurrences34–33 Mya — about 0.2 occurrences28–26 Mya — about 0.3 occurrences26–25 Mya — about 0.4 occurrences25–23 Mya — about 0.3 occurrences1.6–0 Mya — about 1 occurrence41.03 Mya129 ka49 Mya0 Mya

6 occurrences of Gerris 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

6 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

4 formations

Eifel — 50.11°N, 6.82°ERott — 50.75°N, 7.26°EOlympia beds — 47.66°N, 122.43°WBouldnor — 50.74°N, 1.36°W

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The named rock units Gerris has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Gerris and its relatives

Eocene

Where Gerris and its relatives were recorded in the Eocene.

Found in the same rock

986 taxa

The Paleobiology Database records 6 sites for Gerris, 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 6 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 Gerris

Credit
James K. Lindsey
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Gerris 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 itGerrinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Fabricius 1794