Irus

Irus is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams.

Irus

GrahamBould · Public Domain · 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
TapetiniPBDB
Diet
suspension feederPBDB
Life habit
boringPBDB
Motility
facultatively mobile, attachedPBDB
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 20 million years on record.

The record covers at least 20.45 Mya to 11.7 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 23 occurrencesMiocene — about 10 of 23 occurrencesMiocenePliocene — about 1 of 23 occurrencesPliocenePleistocene — about 11 of 23 occurrencesPleistocene24–23 Mya — about 0.2 occurrences23–22 Mya — about 0.5 occurrences22–21 Mya — about 0.5 occurrences21–20 Mya — about 0.5 occurrences20–20 Mya — about 0.4 occurrences20–19 Mya — about 0.4 occurrences19–18 Mya — about 0.4 occurrences18–17 Mya — about 0.4 occurrences17–16 Mya — about 0.4 occurrences16–16 Mya — about 0.5 occurrences16–15 Mya — about 0.5 occurrences15–14 Mya — about 0.5 occurrences14–13 Mya — about 0.5 occurrences13–13 Mya — about 1.0 occurrences13–12 Mya — about 2 occurrences12–11 Mya — about 0.5 occurrences11–10 Mya — about 0.2 occurrences10–9.4 Mya — about 0.2 occurrences9.4–8.6 Mya — about 0.2 occurrences8.6–7.8 Mya — about 0.2 occurrences7.8–7.1 Mya — about 0.1 occurrences3.9–3.1 Mya — about 0.5 occurrences3.1–2.4 Mya — about 0.9 occurrences2.4–1.6 Mya — about 1 occurrence1.6–785 ka Mya — about 1 occurrence785 ka–0 Mya — about 9 occurrences20.45 Mya11.7 ka23.5 Mya0 Mya

23 occurrences of Irus 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

23 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

14 formations

Ihungia — 40.13°S, 176.55°EVolyn' horizon — 50.58°N, 27.02°ELychow — 50.69°N, 22.03°EWeglinek — 50.72°N, 21.95°EWeglin — 50.72°N, 21.95°EGatun — 9.04°N, 80.65°WDampier Limestone — 25.53°S, 113.48°ERed Crag — 51.85°N, 1.28°ETims Thicket/Kooallup Limestone — 32.65°S, 115.63°EToshima Sand — 34.62°N, 137.22°EWerder — 52.98°N, 9.06°EFalun de Sainte-Avit — 43.91°N, 0.66°WWexford Gravels — 52.43°N, 6.33°WRhodes — 36.42°N, 28.20°E

Loading coastlines…

The named rock units Irus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 8 occurrences have no formation on record, which is common for older literature.

Irus and its relatives

Pleistocene

Where Irus and its relatives were recorded in the Pleistocene.

Found in the same rock

1,036 taxa

The Paleobiology Database records 15 sites for Irus, 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

18 references

Each of the 23 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. 6 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 content2

Picture of Irus

Credit
GrahamBould
Licence
Public Domain
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Irus irus · fmnh:invertebrate zoology:176432

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 itTapetini through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Schmidt 1818