Lemna

Lemna is a genus of free-floating aquatic plants referred to by the common name "duckweed". They are morphologically divergent members of the arum family Araceae. These rapidly growing plants have found uses as a model system for studies in community ecology, basic plant biology, ecotoxicology, and production of biopharmaceuticals, and as a source of animal feeds for agriculture and aquaculture. Currently, 14 species of Lemna are recognised.

Lemna

3268zauber · 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
duckweedPBDB
Sits inside
LemnaceaePBDB
Diet
"photoautotroph"PBDB, for Angiospermae

Time the record covers

At least 23 million years on record.

The record covers at least 23.04 Mya to 11.7 ka. No occurrence read is dated outside 66 Mya to 0 Mya.

Late Cretaceous — about 0 of 49 occurrencesPaleocene — about 0 of 49 occurrencesPaleoceneEocene — about 0 of 49 occurrencesEoceneOligocene — about 1 of 49 occurrencesOligoceneMiocene — about 6 of 49 occurrencesMiocenePliocene — about 8 of 49 occurrencesPleistocene — about 27 of 49 occurrences67–65 Mya — about 0.0 occurrences65–63 Mya — about 0.0 occurrences63–61 Mya — about 0.0 occurrences61–58 Mya — about 0.0 occurrences58–56 Mya — about 0.0 occurrences56–54 Mya — about 0.0 occurrences54–52 Mya — about 0.0 occurrences52–49 Mya — about 0.0 occurrences49–47 Mya — about 0.0 occurrences47–45 Mya — about 0.0 occurrences45–43 Mya — about 0.0 occurrences43–40 Mya — about 0.0 occurrences40–38 Mya — about 0.0 occurrences38–36 Mya — about 0.0 occurrences36–34 Mya — about 0.1 occurrences34–31 Mya — about 0.2 occurrences31–29 Mya — about 0.2 occurrences29–27 Mya — about 0.2 occurrences27–25 Mya — about 0.2 occurrences25–22 Mya — about 0.3 occurrences22–20 Mya — about 0.4 occurrences20–18 Mya — about 0.4 occurrences18–16 Mya — about 0.3 occurrences16–13 Mya — about 0.3 occurrences13–11 Mya — about 0.8 occurrences11–9.0 Mya — about 2 occurrences9.0–6.7 Mya — about 2 occurrences6.7–4.5 Mya — about 0.8 occurrences4.5–2.2 Mya — about 11 occurrences2.2–0 Mya — about 30 occurrences23.04 Mya11.7 ka67 Mya0 Mya

49 occurrences of Lemna 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

49 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

1 formation

Norwich Crag — 52.31°N, 1.40°E

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The named rock units Lemna has been recovered from, largest first. Drawn where the rock is now, not where it formed. 48 occurrences have no formation on record, which is common for older literature.

Lemna and its relatives

Pleistocene

Where Lemna and its relatives were recorded in the Pleistocene.

Found in the same rock

548 taxa

The Paleobiology Database records 33 sites for Lemna, 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

10 references

Each of the 49 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 Lemna

Credit
3268zauber
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Lemna 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 itLemnaceae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Linnaeus 1753