Juglans

Walnut trees are any species of tree in the plant genus Juglans, the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts. All species are deciduous trees, 10–40 metres (33–131 ft) tall, with pinnate leaves 200–900 millimetres (7.9–35.4 in), with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (Pterocarya), but not the hickories (Carya) in the same family.

Juglans

Bruce Marlin · 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
Also called
walnutPBDB
Sits inside
JuglandaceaePBDB
Diet
"photoautotroph"PBDB, for Angiospermae

Time the record covers

At least 83 million years on record.

The record covers at least 83.6 Mya to 11.7 ka. No occurrence read is dated outside 100.5 Mya to 0 Mya.

Early Cretaceous — about 0 of 142 occurrencesLate Cretaceous — about 6 of 142 occurrencesLate CretaceousPaleocene — about 9 of 142 occurrencesPaleoceneEocene — about 26 of 142 occurrencesEoceneOligocene — about 10 of 142 occurrencesOligoceneMiocene — about 40 of 142 occurrencesMiocenePliocene — about 17 of 142 occurrencesPleistocene — about 26 of 142 occurrences103–99 Mya — about 0.1 occurrences99–96 Mya — about 0.2 occurrences96–92 Mya — about 0.2 occurrences92–89 Mya — about 0.4 occurrences89–85 Mya — about 0.7 occurrences85–82 Mya — about 0.6 occurrences82–79 Mya — about 0.5 occurrences79–75 Mya — about 0.5 occurrences75–72 Mya — about 0.6 occurrences72–68 Mya — about 1 occurrence68–65 Mya — about 2 occurrences65–62 Mya — about 3 occurrences62–58 Mya — about 3 occurrences58–55 Mya — about 3 occurrences55–51 Mya — about 3 occurrences51–48 Mya — about 3 occurrences48–44 Mya — about 6 occurrences44–41 Mya — about 6 occurrences41–38 Mya — about 5 occurrences38–34 Mya — about 2 occurrences34–31 Mya — about 2 occurrences31–27 Mya — about 2 occurrences27–24 Mya — about 5 occurrences24–21 Mya — about 6 occurrences21–17 Mya — about 7 occurrences17–14 Mya — about 9 occurrences14–10 Mya — about 12 occurrences10–6.8 Mya — about 5 occurrences6.8–3.4 Mya — about 12 occurrences3.4–0 Mya — about 40 occurrences83.6 Mya11.7 ka103 Mya0 Mya

142 occurrences of Juglans on record, most of them in the Miocene. 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

142 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

44 formations

Sepulcher — 44.00°N, 109.00°WSepulcher — 40.00°N, 110.00°WSepulcher — 44.00°N, 111.00°WSepulcher — 44.00°N, 110.00°WFort Union — 43.90°N, 105.20°WFort Union — 45.78°N, 108.50°WFort Union — 46.92°N, 103.52°WFort Union — 48.40°N, 109.27°WFort Union — 48.18°N, 110.12°WOkhonchevayamskaya — 60.42°N, 165.92°ERaton — 37.62°N, 104.78°WRaton — 37.00°N, 104.48°WRaton — 37.12°N, 104.52°WCalvert — 38.16°N, 76.83°WCalvert — 38.67°N, 76.70°WShanwang — 36.55°N, 118.71°EYadagawa — 35.00°N, 136.00°EChallis Volcanics — 44.37°N, 114.24°WSanta Maria di Ciciliano — 42.65°N, 12.49°EMangbang — 24.69°N, 98.63°ECanning — 69.83°N, 145.34°WCanning — 69.92°N, 143.40°WSagavanirktok — 69.95°N, 144.55°WSagavanirktok — 69.79°N, 148.62°WTuscaloosa — 33.61°N, 87.74°WTuscaloosa — 33.17°N, 87.43°WMotojuku — 36.25°N, 138.75°EChausuyama — 36.58°N, 138.17°EValentine — 42.00°N, 100.43°WRenova — 45.50°N, 112.50°WLamar River — 44.00°N, 110.00°WHaughton — 75.41°N, 89.43°WBuffalo Canyon — 39.20°N, 117.78°WMiddlegate — 39.25°N, 117.88°WKameyama — 34.80°N, 136.42°EJohn Day — 45.00°N, 120.20°WKovachinskaya — 60.42°N, 165.92°E

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The named rock units Juglans has been recovered from, largest first. Drawn where the rock is now, not where it formed. 20 further formations hold fewer occurrences each and are not listed. 69 occurrences have no formation on record, which is common for older literature.

Juglans and its relatives

Miocene

Where Juglans and its relatives were recorded in the Miocene.

Found in the same rock

1,469 taxa

The Paleobiology Database records 116 sites for Juglans, 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

48 references

Each of the 142 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. 36 further references are not listed. 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 Juglans

Credit
Bruce Marlin
Licence
CC BY 3.0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Juglans bergomensis · uwbm:36885-B5585

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 itJuglandaceae through timeFormations of the MioceneThe world it lived on

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