Hemitoma octoradiata

Hemitoma octoradiata is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.

Hemitoma octoradiata

James St. John · 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
HemitomaPBDB
Diet
grazerPBDB, for Fissurellidae
Life habit
epifaunalPBDB, for Fissurellidae
Motility
facultatively mobilePBDB, for Fissurellidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At most 3.6 million years on record.

Every occurrence read is dated to somewhere between 3.6 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 4 of 6 occurrencesPliocenePleistocene — about 2 of 6 occurrencesPleistoceneHolocene — about 0 of 6 occurrences3.7–3.6 Mya — about 0.2 occurrences3.6–3.4 Mya — about 0.5 occurrences3.4–3.3 Mya — about 0.5 occurrences3.3–3.1 Mya — about 0.5 occurrences3.1–3.0 Mya — about 0.5 occurrences3.0–2.9 Mya — about 0.5 occurrences2.9–2.7 Mya — about 0.5 occurrences2.7–2.6 Mya — about 0.5 occurrences2.6–2.5 Mya — about 0.2 occurrences2.5–2.3 Mya — about 0.1 occurrences2.3–2.2 Mya — about 0.1 occurrences2.2–2.0 Mya — about 0.1 occurrences2.0–1.9 Mya — about 0.1 occurrences1.9–1.8 Mya — about 0.1 occurrences1.8–1.6 Mya — about 0.1 occurrences1.6–1.5 Mya — about 0.1 occurrences1.5–1.4 Mya — about 0.1 occurrences1.4–1.2 Mya — about 0.1 occurrences1.2–1.1 Mya — about 0.1 occurrences1.1–957 ka Mya — about 0.1 occurrences957 ka–820 ka Mya — about 0.1 occurrences820 ka–683 ka Mya — about 0.1 occurrences683 ka–547 ka Mya — about 0.1 occurrences547 ka–410 ka Mya — about 0.1 occurrences410 ka–273 ka Mya — about 0.1 occurrences273 ka–137 ka Mya — about 0.1 occurrences137 ka–0 Mya — about 0.1 occurrences4.1 Mya0 Mya

6 occurrences of Hemitoma octoradiata on record, most of them in the Pliocene. 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

6 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

2 formations

Mare — 10.61°N, 63.52°WMare — 10.64°N, 64.11°WAraya — 10.62°N, 64.00°W

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The named rock units Hemitoma octoradiata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Hemitoma octoradiata and its relatives

Pliocene

Where Hemitoma octoradiata and its relatives were recorded in the Pliocene.

Found in the same rock

61 taxa

The Paleobiology Database records 2 sites for Hemitoma octoradiata, 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

2 references

Each of the 6 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 content2

Picture of Hemitoma octoradiata

Credit
James St. John
Licence
CC BY 2.0
Commercial use
the licence allows it

CT scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Hemitoma octoradiata · NHMUK:zoo:20240129

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 itHemitoma through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Gmelin 1791)