Rissoina

Rissoina is a large genus of minute sea snails, marine gastropod molluscs or micromolluscs, in the family Rissoinidae.

Rissoina

Jan Delsing · 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
RissoinidaePBDB
Diet
grazerPBDB, for Rissooidea
Life habit
epifaunalPBDB, for Rissooidea
Motility
actively mobilePBDB, for Rissooidea
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 168 million years on record.

The record covers at least 168.2 Mya to 11.7 ka. No occurrence read is dated outside 170.9 Mya to 0 Mya.

Middle Jurassic — about 1 of 298 occurrencesLate Jurassic — about 0 of 298 occurrencesEarly Cretaceous — about 2 of 298 occurrencesEarly CretaceousLate Cretaceous — about 6 of 298 occurrencesLate CretaceousPaleocene — about 11 of 298 occurrencesEocene — about 21 of 298 occurrencesEoceneOligocene — about 0 of 298 occurrencesMiocene — about 109 of 298 occurrencesMiocenePliocene — about 59 of 298 occurrencesPleistocene — about 59 of 298 occurrences174–169 Mya — about 0.9 occurrences169–163 Mya — about 0.1 occurrences139–134 Mya — about 0.8 occurrences134–128 Mya — about 0.2 occurrences116–110 Mya — about 0.2 occurrences110–105 Mya — about 0.5 occurrences105–99 Mya — about 0.3 occurrences87–81 Mya — about 0.6 occurrences81–76 Mya — about 2 occurrences76–70 Mya — about 2 occurrences70–64 Mya — about 5 occurrences64–58 Mya — about 7 occurrences58–52 Mya — about 0.7 occurrences52–46 Mya — about 2 occurrences46–41 Mya — about 9 occurrences41–35 Mya — about 9 occurrences35–29 Mya — about 0.3 occurrences23–17 Mya — about 21 occurrences17–12 Mya — about 43 occurrences12–5.8 Mya — about 41 occurrences5.8–0 Mya — about 152 occurrences168.2 Mya11.7 ka174 Mya0 Mya

298 occurrences of Rissoina 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

298 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

65 formations

Bowden — 17.88°N, 76.28°WTogopi — 5.50°N, 117.00°EMare — 10.61°N, 63.52°WMare — 10.64°N, 64.11°WCaloosahatchee — 26.89°N, 82.01°WCaloosahatchee — 26.96°N, 81.99°WDry Creek Sands — 34.75°S, 138.68°EDry Creek Sands — 34.85°S, 138.60°EDry Creek Sands — 34.91°S, 138.56°ETermofourà — 45.05°N, 7.80°ECercado — 19.47°N, 71.08°WPalau Limestone — 7.37°N, 134.58°ELower Menkrawit — 1.03°N, 118.98°ELower Menkrawit — 1.50°N, 116.50°EQuaternary terrace — 33.75°N, 118.33°WQuaternary terrace — 33.74°N, 118.41°WQuaternary terrace — 33.80°N, 118.39°WLomita Marl — 33.74°N, 118.29°WLomita Marl — 33.75°N, 118.30°WSelsey — 51.02°N, 1.32°WSelsey — 50.73°N, 0.78°WUnnamed — 33.24°N, 119.51°WAscot — 32.08°S, 115.92°EArmuelles — 10.17°N, 85.13°WFalun de Saucats — 44.66°N, 0.57°WPalembang — 2.92°S, 104.75°EMount Hope — 9.33°N, 79.90°WPalos Verdes Sand — 33.99°N, 118.45°WPalos Verdes Sand — 33.60°N, 117.88°WAgatdal — 70.58°N, 53.10°WPorters Creek — 31.97°N, 87.20°WPorters Creek — 31.98°N, 87.28°WPlaya Grande — 10.00°N, 71.00°WRipley — 35.32°N, 88.42°WWaimanalo — 21.45°N, 157.72°W

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The named rock units Rissoina has been recovered from, largest first. Drawn where the rock is now, not where it formed. 41 further formations hold fewer occurrences each and are not listed. 141 occurrences have no formation on record, which is common for older literature.

Rissoina and its relatives

Miocene

Where Rissoina and its relatives were recorded in the Miocene.

Found in the same rock

2,833 taxa

The Paleobiology Database records 89 sites for Rissoina, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

94 references

Each of the 298 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. 82 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 Rissoina

Credit
Jan Delsing
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Rissoina 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.

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 itRissoinidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (d'Orbigny 1841)