Mactra irizari
via iDigBio · CC0 · via iDigBio. 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
- MactraPBDB
- Diet
- suspension feederPBDB, for Mactra
- Life habit
- infaunalPBDB, for Mactra
- Motility
- facultatively mobilePBDB, for Mactra
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 35 million years on record.
The record covers at least 41.03 Mya to 5.333 Mya. No occurrence read is dated outside 161.5 Mya to 2.58 Mya.
28 occurrences of Mactra irizari on record, most of them in the Eocene. 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
28 occurrences- Late Jurassicunder 1%
- Early Cretaceous1%
- Late Cretaceous1%
- Paleoceneunder 1%
- Eocene93%
- Pliocene4%
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
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The named rock units Mactra irizari has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Mactra irizari and its relatives
EoceneWhere Mactra irizari and its relatives were recorded in the Eocene.
Found in the same rock
135 taxa- Polinices (Polinices) subtenuis23 sites
- Eurhomalea newtoni19 sites
- Saxolucina sharmani19 sites
- Colposigma euthenia14 sites
- Sudonassarius antarctohimaleos14 sites
- Cucullaea raea12 sites
- Antarctodarwinella nordenskjoldi10 sites
- Cyclorismina marwicki10 sites
- Austroficopsis wimani9 sites
- Eurhomalea antarctica9 sites
- Conomitra iredalei8 sites
- Modiolus thomsoni8 sites
- Austrobuccinum tuberosum7 sites
- Eucrassatella wilckensi7 sites
- Lahillia wilckensi7 sites
- Ostrea antarctica7 sites
- Periploma topei7 sites
- Struthioptera camachoi7 sites
- Antarctodarwinella ellioti6 sites
- Austrotoma oliveroi6 sites
- Colposigma capitanea6 sites
- Eoscaphella fordycei6 sites
- Nucula (Leionucula) nova6 sites
- Sigapatella disapicula6 sites
The Paleobiology Database records 28 sites for Mactra irizari, 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
2 references- Molluscan Systematics and Biostratigraphy27
- Biota of the "Pecten Conglomerate" (Polenez Cove Formation, Pliocene) of King George Island (South Shetland Islands, Antarctica)1
Each of the 28 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 Mactra irizari
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Mactra irizari 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itMactra through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Wilckens 1912