Hemisinus

Hemisinus is a genus of freshwater snails with an operculum, aquatic gastropod molluscs in the family Hemisinidae.

Hemisinus

Antonio Alejandro Vázquez Perera & Susana Perera Valderrama · CC BY 3.0 · 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
SemisinusinaePBDB
Diet
grazerPBDB, for Cerithioidea
Life habit
epifaunalPBDB, for Cerithioidea
Motility
actively mobilePBDB, for Cerithioidea
Vision
limitedPBDB, for Gastropoda
Environment
freshwaterPBDB, for Thiaridae

Time the record covers

At least 58 million years on record.

The record covers at least 61.66 Mya to 3.6 Mya. No occurrence read is dated outside 66 Mya to 2.58 Mya.

Late Cretaceous — about 0 of 20 occurrencesPaleocene — about 2 of 20 occurrencesPaleoceneEocene — about 8 of 20 occurrencesEoceneOligocene — about 4 of 20 occurrencesOligoceneMiocene — about 5 of 20 occurrencesMiocenePliocene — about 1 of 20 occurrencesPleistocene — about 0 of 20 occurrences67–65 Mya — about 0.2 occurrences65–63 Mya — about 0.5 occurrences63–61 Mya — about 0.3 occurrences61–58 Mya — about 0.2 occurrences58–56 Mya — about 0.7 occurrences56–54 Mya — about 1 occurrence54–52 Mya — about 1 occurrence52–50 Mya — about 1 occurrence50–47 Mya — about 0.8 occurrences47–45 Mya — about 0.2 occurrences45–43 Mya — about 0.2 occurrences43–41 Mya — about 0.3 occurrences41–39 Mya — about 1 occurrence39–36 Mya — about 1 occurrence36–34 Mya — about 0.9 occurrences34–32 Mya — about 1.0 occurrences32–30 Mya — about 1.0 occurrences30–28 Mya — about 1.0 occurrences28–25 Mya — about 0.6 occurrences25–23 Mya — about 0.5 occurrences23–21 Mya — about 0.1 occurrences21–19 Mya — about 0.3 occurrences19–17 Mya — about 0.5 occurrences17–15 Mya — about 0.5 occurrences15–12 Mya — about 0.5 occurrences12–10 Mya — about 1 occurrence10–7.9 Mya — about 2 occurrences7.9–5.7 Mya — about 0.5 occurrences5.7–3.5 Mya — about 0.1 occurrences3.5–1.3 Mya — about 0.9 occurrences61.66 Mya3.6 Mya67 Mya1 Mya

20 occurrences of Hemisinus on record, most of them in the Eocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

20 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

12 formations

Pebas — 3.87°S, 71.38°WPebas — 3.87°S, 73.48°WAdjuntas — 26.23°N, 101.13°WLondon Clay — 50.89°N, 1.28°WCalcaire de Mons — 50.45°N, 3.93°EBabica Beds — 49.92°N, 21.90°EBohio — 9.17°N, 79.85°WMancora — 5.20°S, 80.63°WMoodys Branch — 31.67°N, 92.89°WMare — 10.61°N, 63.52°WTuira — 8.19°N, 77.71°WGatun — 9.26°N, 79.94°WCastilletes — 11.95°N, 71.33°W

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The named rock units Hemisinus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.

Hemisinus and its relatives

Eocene

Where Hemisinus and its relatives were recorded in the Eocene.

Found in the same rock

466 taxa

The Paleobiology Database records 14 sites for Hemisinus, 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

16 references

Each of the 20 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. 4 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 Hemisinus

Credit
Antonio Alejandro Vázquez Perera & Susana Perera Valderrama
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan of Hemisinus was found in MorphoSource and Sketchfab.

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 itSemisinusinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Swainson 1840