Ceratostoma
Ceratostoma, common name the "hornmouth" snails, is a genus of medium to large predatory sea snails, marine gastropod mollusks in the family Muricidae, the rock snails.

Steve Lonhart (SIMoN / MBNMS) · 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
- ThaidinaePBDB
- Diet
- carnivorePBDB, for Muricidae
- Life habit
- epifaunalPBDB, for Muricidae
- Motility
- actively mobilePBDB, for Muricidae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 20 million years on record.
The record covers at least 20.45 Mya to 129 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.
44 occurrences of Ceratostoma 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
44 occurrences- Miocene20%
- Pliocene7%
- Pleistocene73%
- Holoceneunder 1%
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
13 formations
- Palos Verdes Sand Formation9
- Pancho Rico Formation4
- Unnamed Formation3
- Lomita Marl Formation3
- Onzole Formation2
- Encanto Formation2
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The named rock units Ceratostoma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 occurrences have no formation on record, which is common for older literature.
Ceratostoma and its relatives
PleistoceneWhere Ceratostoma and its relatives were recorded in the Pleistocene.
Found in the same rock
922 taxa- Callianax biplicata23 sites
- Californiconus californicus20 sites
- Crassadoma gigantea20 sites
- Caesia fossatus18 sites
- Caesia perpinguis18 sites
- Crepidula nummaria18 sites
- Littorina (Littorina) scutulata18 sites
- Callianax pedroana17 sites
- Dentalium neohexagonum17 sites
- Glossaulax reclusiana17 sites
- Paciocinebrina lurida17 sites
- Acanthinucella spirata16 sites
- Amphissa versicolor16 sites
- Crepidula adunca16 sites
- Lottia scabra16 sites
- Mytilus californianus16 sites
- Thylacodes squamigerus16 sites
- Atrimitra idae15 sites
- Epilucina californica15 sites
- Glycymeris septentrionalis15 sites
- Mitrella tuberosa15 sites
- Tresus nuttallii15 sites
- Diodora aspera14 sites
- Hima cooperi14 sites
The Paleobiology Database records 35 sites for Ceratostoma, 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
18 references- Late Pleistocene megafauna of Cayucos, California, and its zoogeographic significance8
- The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene of San Pedro, California5
- Pancho Rico Formation, Salinas Valley4
- Late Pleistocene invertebrates of the Newport Bay area, California4
- Muricidae (Mollusca: Gastropoda) of the Angostura Formation3
- Geology of San Nicolas Island, California3
- Geology and Paleontology of Palos Verdes Hills, California3
- Muricidae (Mollusca: Gastropoda) of the Esmeraldas Beds, northwestern Ecuador2
- Late Pleistocene molluscan faunas from upper terraces of the Palos Verdes Hills, California2
- Tertiary and Quaternary Gastropoda of Okinawa: A comparison of the late Miocene, Pliocene, and Pleistocene Gastropoda of Okinawa with related faunas of East Asia together with a resume of the geological setting of the fossiliferous deposits2
- Paleoecologic analysis and age of a late Pleistocene fossil assemblage from Upper Newport Bay, Newport Beach, Orange County, California1
- Pliocene marine fauna from Tane-ga-shima, South Kyushu, Japan1
Each of the 44 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. 6 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 content2
Picture of Ceratostoma
- Source
- Wikipedia/Commons
- Credit
- Steve Lonhart (SIMoN / MBNMS)
- Licence
- Public Domain
- Commercial use
- the licence allows it
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
- Source
- Wikipedia, “Ceratostoma”
- 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 itThaidinae through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Hermannsen 1846)