Portlandia

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 121 million years on record.

The record covers at least 121.4 Mya to 11.7 ka. No occurrence read is dated outside 125.77 Mya to 0 Mya.

Early Cretaceous — about 3 of 178 occurrencesEarly CretaceousLate Cretaceous — about 4 of 178 occurrencesLate CretaceousPaleocene — about 0 of 178 occurrencesEocene — about 37 of 178 occurrencesEoceneOligocene — about 36 of 178 occurrencesOligoceneMiocene — about 16 of 178 occurrencesMiocenePliocene — about 6 of 178 occurrencesPleistocene — about 58 of 178 occurrences128–124 Mya — about 0.5 occurrences124–120 Mya — about 1 occurrence120–115 Mya — about 0.9 occurrences115–111 Mya — about 0.5 occurrences90–86 Mya — about 0.0 occurrences86–81 Mya — about 0.9 occurrences81–77 Mya — about 1 occurrence77–73 Mya — about 1 occurrence73–68 Mya — about 0.2 occurrences60–56 Mya — about 0.2 occurrences56–51 Mya — about 2 occurrences51–47 Mya — about 2 occurrences47–43 Mya — about 4 occurrences43–38 Mya — about 3 occurrences38–34 Mya — about 24 occurrences34–30 Mya — about 10 occurrences30–26 Mya — about 14 occurrences26–21 Mya — about 16 occurrences21–17 Mya — about 6 occurrences17–13 Mya — about 5 occurrences13–8.6 Mya — about 2 occurrences8.6–4.3 Mya — about 2 occurrences4.3–0 Mya — about 81 occurrences121.4 Mya11.7 ka128 Mya0 Mya

178 occurrences of Portlandia 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

178 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

48 formations

Presumpscot — 43.64°N, 70.48°WPresumpscot — 43.89°N, 70.28°WPresumpscot — 43.84°N, 70.10°WPresumpscot — 45.19°N, 67.28°WPresumpscot — 43.91°N, 69.97°WPresumpscot — 44.23°N, 69.78°WPresumpscot — 43.35°N, 70.50°WPresumpscot — 43.80°N, 70.19°WPresumpscot — 44.10°N, 70.21°WPresumpscot — 43.63°N, 70.05°WPresumpscot — 43.50°N, 70.44°WPresumpscot — 43.64°N, 70.26°WPresumpscot — 44.80°N, 68.78°WSan Emigdio — 35.06°N, 119.18°WSan Emigdio — 35.41°N, 119.69°WOmagari — 42.83°N, 143.67°EBlakeley — 47.58°N, 122.48°WBlakeley — 48.16°N, 123.95°WKap Kobenhavn — 82.38°N, 21.00°WKap Kobenhavn — 82.47°N, 21.00°WKap Kobenhavn — 81.00°N, 21.00°WShitakara — 42.98°N, 144.38°EShitakara — 43.25°N, 144.08°EPoronai — 43.25°N, 141.97°EPoronai — 43.26°N, 141.89°EPleito — 34.99°N, 119.19°WEugene — 44.05°N, 123.09°WEugene — 44.16°N, 123.05°WEugene — 45.21°N, 123.20°WBowden — 17.88°N, 76.28°WTappu — 44.04°N, 141.85°EMinato, Azenotani & Shichi Shale, Kitaama Sandstone, Yoroizaki Sandstone — 34.47°N, 135.42°ETumey — 36.55°N, 120.49°WKadyny — 54.28°N, 19.49°EKamicharo — 42.95°N, 144.07°EChamplain Clay — 45.75°N, 62.72°WChamplain Clay — 47.55°N, 52.67°WAsahi — 43.23°N, 141.85°EKeasey — 46.00°N, 123.26°WKeasey — 45.88°N, 123.26°WArdath — 32.86°N, 117.24°WPysht — 48.16°N, 123.96°WPysht — 48.17°N, 123.94°WJewett — 35.49°N, 118.85°WMinato, Azenotani, Kitaama & Shichi Shale, Shimonada Siltsone, Yoroizaki Sandstone — 34.50°N, 135.00°EAstoria — 45.22°N, 123.97°WStepovak — 55.37°N, 161.36°W

Loading coastlines…

The named rock units Portlandia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 24 further formations hold fewer occurrences each and are not listed. 64 occurrences have no formation on record, which is common for older literature.

Portlandia and its relatives

Pleistocene

Where Portlandia and its relatives were recorded in the Pleistocene.

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

56 references

Each of the 178 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. 44 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 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 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 itYoldiinae through timeFormations of the PleistoceneThe world it lived on

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