Isognomon

Searched as Perna sp.. The Paleobiology Database treats Isognomon as the accepted name.

Isognomon

Uncredited · via Wikidata/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
IsognomoninaePBDB
Diet
suspension feederPBDB
Life habit
epifaunalPBDB
Motility
stationary, attachedPBDB
Vision
blindPBDB, for Bivalvia
Environment
marine,brackishPBDB, for Ostreida

Time the record covers

At least 204 million years on record.

The record covers at least 205.7 Mya to 774 ka. No occurrence read is dated outside 215.38 Mya to 11.7 ka.

Late Triassic — about 2 of 73 occurrencesLate TriassicEarly Jurassic — about 5 of 73 occurrencesEarly JurassicMiddle Jurassic — about 2 of 73 occurrencesLate Jurassic — about 9 of 73 occurrencesLate JurassicEarly Cretaceous — about 9 of 73 occurrencesEarly CretaceousLate Cretaceous — about 6 of 73 occurrencesLate CretaceousPaleocene — about 0 of 73 occurrencesEocene — about 7 of 73 occurrencesEoceneOligocene — about 2 of 73 occurrencesMiocene — about 13 of 73 occurrencesPliocene — about 9 of 73 occurrencesPleistocene — about 8 of 73 occurrences220–212 Mya — about 0.3 occurrences212–205 Mya — about 0.8 occurrences205–198 Mya — about 3 occurrences198–190 Mya — about 0.6 occurrences190–183 Mya — about 1 occurrence183–176 Mya — about 1 occurrence168–161 Mya — about 2 occurrences161–154 Mya — about 3 occurrences154–146 Mya — about 5 occurrences146–139 Mya — about 0.9 occurrences139–132 Mya — about 3 occurrences132–124 Mya — about 4 occurrences124–117 Mya — about 0.7 occurrences117–110 Mya — about 0.5 occurrences110–103 Mya — about 0.7 occurrences103–95 Mya — about 1 occurrence95–88 Mya — about 0.2 occurrences88–81 Mya — about 2 occurrences81–73 Mya — about 2 occurrences73–66 Mya — about 1 occurrence51–44 Mya — about 2 occurrences44–37 Mya — about 3 occurrences37–29 Mya — about 3 occurrences29–22 Mya — about 4 occurrences22–15 Mya — about 7 occurrences15–7.3 Mya — about 3 occurrences7.3–0 Mya — about 18 occurrences205.7 Mya774 ka220 Mya0 Mya

73 occurrences of Isognomon 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

73 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

37 formations

Lourinhã — 39.22°N, 9.34°WMonte Leon Fm — 50.12°S, 68.48°WMonte Leon Fm — 50.23°S, 68.92°WTamiami — 27.34°N, 82.42°WTamiami — 27.34°N, 82.51°WMont Rond — 49.62°S, 70.30°EAtherfield Clay — 51.23°N, 0.58°WBlackdown Greensand — 52.63°N, 1.13°WVarswater — 32.98°S, 18.15°EMagyaregregy Conglomerate — 46.17°N, 18.25°EOtuma — 15.04°S, 74.97°WOtahuhu — 36.95°S, 174.80°ESan Julian — 47.13°S, 66.05°WSmithers — 56.21°N, 126.35°WGildehausen Sandstone — 52.30°N, 7.12°EKimmeridge Clay — 51.74°N, 1.31°WSan Julián — 47.13°S, 66.05°WPalembang — 2.92°S, 104.75°ENyalindung — 7.49°S, 110.00°ESubmeseta — 64.24°S, 56.66°WUgod — 46.98°N, 17.28°EPeace River — 27.18°N, 81.80°WJackson Bluff — 30.39°N, 84.64°WWaiomio — 40.03°S, 175.48°EEbelsberg — 48.21°N, 14.22°ECaleta Herradura de Mejillones — 23.36°S, 70.53°W

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The named rock units Isognomon has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 further formations hold fewer occurrences each and are not listed. 31 occurrences have no formation on record, which is common for older literature.

Isognomon and its relatives

Miocene

Where Isognomon and its relatives were recorded in the Miocene.

Found in the same rock

1,345 taxa

The Paleobiology Database records 498 sites for Isognomon, and this reads 240 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

55 references

Each of the 73 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. 43 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 Isognomon

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

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 itIsognomoninae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Bruguière 1789