Portlandia

Searched as Portlandia (Yoldiella) pygmaea. The Paleobiology Database treats Portlandia as the accepted name.

Portlandia is a genus of marine bivalve mollusks in the family Yoldiidae. They can be found in all the oceans. The genus includes Portlandia arctica, the bivalve which gave its name – when it was still known as Yoldia arctica – to the Yoldia Sea.

Portlandia

Tom Meijer · 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
Sits inside
YoldiinaePBDB
Diet
deposit feederPBDB, for Sareptidae
Life habit
infaunalPBDB, for Sareptidae
Motility
facultatively mobilePBDB, for Sareptidae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 7 million years on record.

The record covers at least 23.04 Mya to 15.98 Mya. No occurrence read is dated outside 27.3 Mya to 5.333 Mya.

Oligocene — about 2 of 43 occurrencesOligoceneMiocene — about 41 of 43 occurrencesMiocenePliocene — about 0 of 43 occurrences28–27 Mya — about 0.1 occurrences27–26 Mya — about 0.4 occurrences26–26 Mya — about 0.4 occurrences26–25 Mya — about 0.4 occurrences25–24 Mya — about 0.4 occurrences24–23 Mya — about 0.4 occurrences23–22 Mya — about 0.7 occurrences22–22 Mya — about 0.8 occurrences22–21 Mya — about 0.8 occurrences21–20 Mya — about 0.8 occurrences20–19 Mya — about 0.8 occurrences19–19 Mya — about 0.8 occurrences19–18 Mya — about 0.8 occurrences18–17 Mya — about 0.8 occurrences17–16 Mya — about 0.8 occurrences16–16 Mya — about 3 occurrences16–15 Mya — about 5 occurrences15–14 Mya — about 5 occurrences14–13 Mya — about 5 occurrences13–12 Mya — about 5 occurrences12–12 Mya — about 5 occurrences12–11 Mya — about 1 occurrence11–10 Mya — about 0.5 occurrences10–9.4 Mya — about 0.5 occurrences9.4–8.7 Mya — about 0.5 occurrences8.7–7.9 Mya — about 0.5 occurrences7.9–7.1 Mya — about 0.5 occurrences7.1–6.4 Mya — about 0.5 occurrences6.4–5.6 Mya — about 0.5 occurrences5.6–4.8 Mya — about 0.2 occurrences23.04 Mya15.98 Mya27.8 Mya4.8 Mya

43 occurrences of Portlandia on record, most of them in the Miocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

43 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

Breda — 51.95°N, 6.75°EBrejning Clay — 56.17°N, 9.75°EVejle Fjord — 55.18°N, 11.88°E

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The named rock units Portlandia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 39 occurrences have no formation on record, which is common for older literature.

Portlandia and its relatives

Miocene

Where Portlandia and its relatives were recorded in the Miocene.

Found in the same rock

1,491 taxa

The Paleobiology Database records 95 sites for Portlandia, 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

4 references

Each of the 43 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Portlandia

Credit
Tom Meijer
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Portlandia 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 itYoldiinae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Mörch 1857)