Physa

Physa is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the subfamily Physinae of the family Physidae.

Physa

Francisco Welter Schultes · 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
PhysiniPBDB
Life habit
epifaunalPBDB, for Gastropoda
Motility
actively mobilePBDB, for Gastropoda
Vision
limitedPBDB, for Gastropoda
Environment
freshwaterPBDB, for Physidae

Time the record covers

At least 139 million years on record.

The record covers at least 139.1 Mya to 11.7 ka. No occurrence read is dated outside 143.1 Mya to 0 Mya.

Late Jurassic — about 0 of 92 occurrencesEarly Cretaceous — about 3 of 92 occurrencesEarly CretaceousLate Cretaceous — about 45 of 92 occurrencesLate CretaceousPaleocene — about 5 of 92 occurrencesEocene — about 10 of 92 occurrencesEoceneOligocene — about 0 of 92 occurrencesMiocene — about 0 of 92 occurrencesPliocene — about 5 of 92 occurrencesPleistocene — about 23 of 92 occurrences146–141 Mya — about 0.3 occurrences141–136 Mya — about 2 occurrences117–112 Mya — about 0.4 occurrences112–107 Mya — about 0.6 occurrences102–97 Mya — about 0.4 occurrences97–92 Mya — about 0.6 occurrences92–88 Mya — about 1 occurrence88–83 Mya — about 3 occurrences83–78 Mya — about 6 occurrences78–73 Mya — about 6 occurrences73–68 Mya — about 19 occurrences68–63 Mya — about 12 occurrences63–58 Mya — about 2 occurrences58–54 Mya — about 2 occurrences54–49 Mya — about 4 occurrences49–44 Mya — about 3 occurrences44–39 Mya — about 1 occurrence39–34 Mya — about 0.7 occurrences34–29 Mya — about 0.0 occurrences9.7–4.9 Mya — about 0.8 occurrences4.9–0 Mya — about 28 occurrences139.1 Mya11.7 ka146 Mya0 Mya

92 occurrences of Physa on record, most of them in the Late Cretaceous. 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

92 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

41 formations

Lameta — 22.92°N, 79.32°ELameta — 20.75°N, 79.48°ELameta — 20.85°N, 79.25°ELameta — 23.77°N, 78.72°ELameta — 20.71°N, 79.29°ELameta — 20.35°N, 79.05°ELameta — 23.17°N, 79.95°EMankuanhe — 22.49°N, 101.51°EQueguay — 33.53°S, 56.88°WQueguay — 32.37°S, 57.61°WQueguay — 32.48°S, 57.41°WQueguay — 33.13°S, 57.25°WNorth Horn — 39.27°N, 111.25°WNorth Horn — 39.10°N, 111.80°WFort Crittenden — 31.69°N, 110.81°WCaloosahatchee — 26.89°N, 82.01°WCaloosahatchee — 26.96°N, 81.17°WLance — 43.12°N, 104.64°WLance — 43.15°N, 104.57°WLance — 43.17°N, 104.53°WWind River — 43.36°N, 107.41°WWind River — 43.36°N, 107.88°WTruckee — 39.87°N, 118.75°WTwo Medicine — 48.63°N, 113.75°WTwo Medicine — 47.81°N, 112.18°WHell Creek — 46.90°N, 101.50°WHell Creek — 47.57°N, 106.95°WWillwood — 44.30°N, 109.00°WWillwood — 44.01°N, 108.52°WArén — 42.13°N, 1.09°EPalos Verdes — 33.63°N, 117.90°WLodo — 36.60°N, 120.69°WRavenscrag — 49.13°N, 104.88°WCalcaire de Mons — 50.45°N, 3.93°ELulworth — 50.60°N, 1.97°WPaskapoo — 54.83°N, 115.51°WAdamantina — 20.80°S, 49.38°WSappa — 39.80°N, 98.10°WMilk River — 49.08°N, 111.41°WFort Thompson — 26.96°N, 81.17°WCorral de Enmedio — 31.13°N, 109.82°W

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The named rock units Physa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 further formations hold fewer occurrences each and are not listed. 22 occurrences have no formation on record, which is common for older literature.

Physa and its relatives

Late Cretaceous

Where Physa and its relatives were recorded in the Late Cretaceous.

Found in the same rock

2,206 taxa

The Paleobiology Database records 84 sites for Physa, 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

60 references

Each of the 92 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. 48 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 Physa

Credit
Francisco Welter Schultes
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itPhysini through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Draparnaud 1801