Hydraena

Hydraena is a genus of minute moss beetles in the family Hydraenidae. There are more than 990 described species in Hydraena.

Hydraena

Udo Schmidt from Deutschland · CC BY-SA 2.0 · 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
HydraeniniPBDB
Motility
actively mobilePBDB, for Arthropoda
Environment
terrestrialPBDB, for Insecta

Time the record covers

At most 1.8 million years on record.

Every occurrence read is dated to somewhere between 1.8 Mya 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 26 of 26 occurrencesPleistoceneHolocene — about 0 of 26 occurrences1.8–1.8 Mya — about 0.0 occurrences1.8–1.7 Mya — about 0.0 occurrences1.7–1.6 Mya — about 0.0 occurrences1.6–1.5 Mya — about 0.0 occurrences1.5–1.5 Mya — about 0.0 occurrences1.5–1.4 Mya — about 0.0 occurrences1.4–1.3 Mya — about 0.0 occurrences1.3–1.2 Mya — about 0.0 occurrences1.2–1.1 Mya — about 0.0 occurrences1.1–1.1 Mya — about 0.0 occurrences1.1–997 ka Mya — about 0.0 occurrences997 ka–920 ka Mya — about 0.0 occurrences920 ka–843 ka Mya — about 0.0 occurrences843 ka–767 ka Mya — about 0.3 occurrences767 ka–690 ka Mya — about 2 occurrences690 ka–613 ka Mya — about 2 occurrences613 ka–537 ka Mya — about 2 occurrences537 ka–460 ka Mya — about 2 occurrences460 ka–383 ka Mya — about 2 occurrences383 ka–307 ka Mya — about 2 occurrences307 ka–230 ka Mya — about 2 occurrences230 ka–153 ka Mya — about 2 occurrences153 ka–77 ka Mya — about 3 occurrences77 ka–0 Mya — about 3 occurrences2.3 Mya0 Mya

26 occurrences of Hydraena 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

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

3 formations

Highbury Silts and Sands — 51.56°N, 0.06°WTitusville Till — 41.62°N, 79.64°WCastle Eden Fissure-Fill — 54.74°N, 1.33°W

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The named rock units Hydraena has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Hydraena and its relatives

Pleistocene

Where Hydraena and its relatives were recorded in the Pleistocene.

Found in the same rock

388 taxa

The Paleobiology Database records 25 sites for Hydraena, 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

6 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 content1

Picture of Hydraena

Credit
Udo Schmidt from Deutschland
Licence
CC BY-SA 2.0
Commercial use
the licence allows it

No 3D scan of Hydraena 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 itHydraenini through timeFormations of the PleistoceneThe world it lived on

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