Isognomon

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

Perna is a genus of mussels, marine bivalve molluscs in the family Mytilidae.

Isognomon

Richard Giddins from London, UK · CC BY 2.0 · 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
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 251 million years on record.

The record covers at least 251.902 Mya to 129 ka. No occurrence read is dated outside 254.14 Mya to 11.7 ka.

Permian — about 3 of 621 occurrencesEarly Triassic — about 0 of 621 occurrencesMiddle Triassic — about 0 of 621 occurrencesLate Triassic — about 18 of 621 occurrencesLate TriassicEarly Jurassic — about 63 of 621 occurrencesEarly JurassicMiddle Jurassic — about 42 of 621 occurrencesLate Jurassic — about 216 of 621 occurrencesEarly Cretaceous — about 48 of 621 occurrencesEarly CretaceousLate Cretaceous — about 41 of 621 occurrencesLate CretaceousPaleocene — about 6 of 621 occurrencesEocene — about 27 of 621 occurrencesEoceneOligocene — about 11 of 621 occurrencesMiocene — about 100 of 621 occurrencesPliocene — about 21 of 621 occurrencesPleistocene — about 25 of 621 occurrences259–251 Mya — about 3 occurrences242–233 Mya — about 2 occurrences233–225 Mya — about 1 occurrence225–216 Mya — about 4 occurrences216–207 Mya — about 6 occurrences207–199 Mya — about 10 occurrences199–190 Mya — about 19 occurrences190–181 Mya — about 35 occurrences181–173 Mya — about 4 occurrences173–164 Mya — about 39 occurrences164–156 Mya — about 77 occurrences156–147 Mya — about 91 occurrences147–138 Mya — about 59 occurrences138–130 Mya — about 12 occurrences130–121 Mya — about 7 occurrences121–112 Mya — about 14 occurrences112–104 Mya — about 5 occurrences104–95 Mya — about 8 occurrences95–86 Mya — about 4 occurrences86–78 Mya — about 9 occurrences78–69 Mya — about 14 occurrences69–60 Mya — about 11 occurrences60–52 Mya — about 5 occurrences52–43 Mya — about 6 occurrences43–35 Mya — about 17 occurrences35–26 Mya — about 10 occurrences26–17 Mya — about 28 occurrences17–8.6 Mya — about 54 occurrences8.6–0 Mya — about 67 occurrences251.902 Mya129 ka259 Mya0 Mya

621 occurrences of Isognomon on record, most of them in the Late Jurassic. 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

621 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

169 formations

Kap Leslie — 70.48°N, 21.97°WChoptank — 38.53°N, 76.52°WChoptank — 38.38°N, 76.50°WChoptank — 38.39°N, 76.57°WChoptank — 38.73°N, 76.02°WChoptank — 38.62°N, 76.12°WChoptank — 38.38°N, 76.38°WCarmel — 37.70°N, 113.05°WCarmel — 37.59°N, 113.06°WCarmel — 37.51°N, 113.13°WCarmel — 37.25°N, 113.52°WCarmel — 39.17°N, 110.73°WCarmel — 39.04°N, 110.40°WCarmel — 38.90°N, 110.45°WCarmel — 38.71°N, 110.55°WCarmel — 38.74°N, 110.52°WCarmel — 38.59°N, 110.78°WCarmel — 38.22°N, 111.15°WCarmel — 37.93°N, 111.66°WCarmel — 37.27°N, 112.52°WCarmel — 37.31°N, 112.59°WCarmel — 37.22°N, 112.68°WCarmel — 37.25°N, 112.90°WTrigonia clavellata — 50.80°N, 2.28°WTrigonia clavellata — 50.60°N, 2.45°WPiedra Pintada — 40.12°S, 70.27°WPiedra Pintada — 39.97°S, 70.47°WPiedra Pintada — 40.05°S, 70.35°WPiedra Pintada — 40.15°S, 70.30°WEastover — 37.22°N, 76.93°WEastover — 36.44°N, 77.10°WEastover — 37.29°N, 77.25°WEastover — 37.10°N, 76.39°WEastover — 37.17°N, 76.77°WEastover — 38.07°N, 76.92°WEastover — 37.51°N, 77.21°WEastover — 37.27°N, 76.57°WEastover — 37.55°N, 77.06°WSobral — 39.10°N, 9.27°WSobral — 38.97°N, 9.10°WArgiles a Lopha gregarea — 49.30°N, 0.07°WAtherfield Clay — 50.60°N, 1.32°WAtherfield Clay — 51.28°N, 0.53°EAtherfield Clay — 51.23°N, 0.22°WAtherfield Clay — 51.23°N, 0.58°WAtherfield Clay — 50.61°N, 1.36°WAlcobaca — 39.32°N, 9.35°WAlcobaca — 38.42°N, 9.22°WAlcobaca — 39.52°N, 9.13°WKirkwood — 39.43°N, 75.23°WKirkwood — 39.47°N, 75.35°WKirkwood — 39.46°N, 75.30°WKirkwood — 39.36°N, 74.42°WKirkwood — 39.15°N, 74.69°WKirkwood — 39.08°N, 74.82°WKirkwood — 39.00°N, 75.12°WCalvert — 38.54°N, 76.73°WCalvert — 39.20°N, 75.60°WCalvert — 38.63°N, 76.51°WCalvert — 38.53°N, 76.52°WCalvert — 38.17°N, 76.80°WCalvert — 38.67°N, 76.53°WMaéjima — 34.60°N, 134.17°ECalcaire a oolithes ferrugineuses — 49.30°N, 0.07°WVaqueros — 33.64°N, 117.59°WVaqueros — 35.31°N, 120.04°WVaqueros — 35.25°N, 120.05°WVaqueros — 35.25°N, 120.06°WPigeon Point — 37.19°N, 122.40°WKahuitara Tuff — 44.33°S, 176.00°WKahuitara Tuff — 44.33°S, 176.25°EOsmington Oolite — 50.80°N, 2.28°WOsmington Oolite — 51.75°N, 1.25°WLourinhã — 39.10°N, 9.27°WLourinhã — 39.22°N, 9.34°WAlexandria — 33.97°S, 25.62°EAlexandria — 32.98°S, 27.58°EAlexandria — 33.82°S, 25.65°EAlexandria — 33.80°S, 25.61°ECape Stewart Beds — 70.44°N, 22.64°WCape Stewart Beds — 70.46°N, 22.71°WCape Stewart Beds — 70.47°N, 22.64°WCoralline Oolite — 54.23°N, 0.43°WCoralline Oolite — 53.97°N, 1.08°WCoralline Oolite — 53.98°N, 1.53°WCoralline Oolite — 54.21°N, 0.29°WCoral Rag de Trouville — 48.60°N, 0.63°ECoral Rag de Trouville — 49.32°N, 0.03°ECoral Rag de Trouville — 49.37°N, 0.08°ECoral Rag de Trouville — 49.30°N, 0.07°WNothe Grits — 50.63°N, 2.37°WNothe Grits — 50.80°N, 2.28°W

Loading coastlines…

The named rock units Isognomon has been recovered from, largest first. Drawn where the rock is now, not where it formed. 145 further formations hold fewer occurrences each and are not listed. 137 occurrences have no formation on record, which is common for older literature.

Isognomon and its relatives

Late Jurassic

Where Isognomon and its relatives were recorded in the Late Jurassic.

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

202 references

Each of the 621 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. 190 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
Richard Giddins from London, UK
Licence
CC BY 2.0
Commercial use
the licence allows it

3D model

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

MorphoSource 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 itIsognomoninae through timeFormations of the Late JurassicThe world it lived on

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