Ilyanassa obsoleta

The eastern mudsnail, Ilyanassa obsoleta, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the nassa mud snails.

Ilyanassa obsoleta

Naturalis Biodiversity Center · CC0 · 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
IlyanassaPBDB
Diet
carnivorePBDB, for Nassariidae
Life habit
low-level epifaunalPBDB, for Nassariidae
Motility
slow-movingPBDB, for Nassariidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At most 2.6 million years on record.

Every occurrence read is dated to somewhere between 2.58 Mya and 11.7 ka, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Pliocene — about 0 of 35 occurrencesPleistocene — about 35 of 35 occurrencesPleistoceneHolocene — about 0 of 35 occurrences2.7–2.6 Mya — about 0.1 occurrences2.6–2.5 Mya — about 0.7 occurrences2.5–2.4 Mya — about 0.7 occurrences2.4–2.3 Mya — about 0.7 occurrences2.3–2.2 Mya — about 0.7 occurrences2.2–2.1 Mya — about 0.7 occurrences2.1–2.0 Mya — about 0.7 occurrences2.0–1.8 Mya — about 0.7 occurrences1.8–1.7 Mya — about 0.7 occurrences1.7–1.6 Mya — about 0.7 occurrences1.6–1.5 Mya — about 0.7 occurrences1.5–1.4 Mya — about 0.7 occurrences1.4–1.3 Mya — about 0.7 occurrences1.3–1.2 Mya — about 0.7 occurrences1.2–1.1 Mya — about 0.7 occurrences1.1–1.0 Mya — about 0.7 occurrences1.0–924 ka Mya — about 0.7 occurrences924 ka–821 ka Mya — about 0.7 occurrences821 ka–719 ka Mya — about 0.7 occurrences719 ka–616 ka Mya — about 0.7 occurrences616 ka–513 ka Mya — about 0.7 occurrences513 ka–411 ka Mya — about 0.7 occurrences411 ka–308 ka Mya — about 0.7 occurrences308 ka–205 ka Mya — about 0.7 occurrences205 ka–103 ka Mya — about 5 occurrences103 ka–0 Mya — about 15 occurrences3.08 Mya0 Mya

35 occurrences of Ilyanassa obsoleta on record, most of them in the Pleistocene. 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

35 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

5 formations

Pamlico — 38.69°N, 75.77°WPamlico — 38.55°N, 75.08°WPamlico — 32.78°N, 79.93°WPamlico — 32.69°N, 80.23°WPamlico — 34.04°N, 77.89°WPamlico — 34.78°N, 76.69°WPamlico — 35.70°N, 75.74°WPamlico — 35.50°N, 76.27°WAcredale — 36.79°N, 76.17°WNorfolk — 36.79°N, 76.41°WTalbot — 38.15°N, 76.43°WHorry Clay — 34.97°N, 76.97°W

Loading coastlines…

The named rock units Ilyanassa obsoleta has been recovered from, largest first. Drawn where the rock is now, not where it formed. 20 occurrences have no formation on record, which is common for older literature.

Ilyanassa obsoleta and its relatives

Pleistocene

Where Ilyanassa obsoleta and its relatives were recorded in the Pleistocene.

Found in the same rock

199 taxa

The Paleobiology Database records 7 sites for Ilyanassa obsoleta, 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

5 references

Each of the 35 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Ilyanassa obsoleta

Credit
Naturalis Biodiversity Center
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Ilyanassa obsoleta 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 itIlyanassa through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Say 1822)