Mohnia
Mohnia is a genus of sea snails, marine gastropod mollusks in the subfamily Siphonaliinae of the family Buccinidae, the true whelks.

Manuel CABALLER · CC BY 4.0 · 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
- SiphonaliinaePBDB
- Diet
- carnivorePBDB, for Buccinidae
- Life habit
- epifaunalPBDB, for Buccinidae
- Motility
- actively mobilePBDB, for Buccinidae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At most 2.8 million years on record.
Every occurrence read is dated to somewhere between 5.333 Mya and 2.58 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
4 occurrences of Mohnia 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
4 occurrences- Pliocene100%
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
- Tentokuji Formation2
- Tomioka Formation · Taga Group1
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The named rock units Mohnia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Mohnia and its relatives
PlioceneWhere Mohnia and its relatives were recorded in the Pliocene.
Found in the same rock
149 taxa- Anadara3 sites
- Acila (Truncacila)2 sites
- Anomia2 sites
- Antiplanes2 sites
- Buccinum2 sites
- Clinocardium (Keenocardium) californiense2 sites
- Conchocele bisecta2 sites
- Corbula (Anisocorbula)2 sites
- Cryptonatica janthostoma2 sites
- Glossaulax didyma2 sites
- Glycymeris2 sites
- Lucinoma annulata2 sites
- Macoma (Macoma) calcarea2 sites
- Mercenaria2 sites
- Neptunea2 sites
- Ocinebrellus2 sites
- Olivella2 sites
- Ophiodermella2 sites
- Turbonilla2 sites
- Turritella2 sites
- Aartsenia gouldi1 site
- Acesta1 site
- Acharax johnsoni1 site
- Acila mirabilis vigilia1 site
The Paleobiology Database records 3 sites for Mohnia, 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
3 references- Warm-water influx into Japan Sea in the middle Pliocene - Molluscan faunas from the Tentokuji FOrmation around Mt. Taihei in Akita Prefecture2
- Pectinids from the Taga Group of the Joban Coalfield1
- On a new fossil sea-lion from the Uonuma Group (Plio-Pleistocene), Ojiya, Niigata Prefecture, Central Japan1
Each of the 4 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 Mohnia
- Source
- Wikipedia/Commons
- Credit
- Manuel CABALLER
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Mohnia 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
- Source
- Wikipedia, “Mohnia”
- 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 itSiphonaliinae through timeFormations of the PlioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Friele 1878