Opalia varicostata

via iDigBio · CC0 · via iDigBio. 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
- OpaliaPBDB
- Diet
- carnivorePBDB, for Epitoniidae
- Life habit
- low-level epifaunalPBDB, for Epitoniidae
- Motility
- slow-movingPBDB, for Epitoniidae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 1 million years on record.
The record covers at least 3.6 Mya to 2.58 Mya. No occurrence read is dated outside 5.333 Mya to 1.8 Mya.
12 occurrences of Opalia varicostata on record, most of them in the Pliocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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
12 occurrences- Pliocene78%
- Pleistocene22%
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
6 formations
- Pico Formation4
- San Diego Formation3
- Careaga Sandstone Formation2
- Foxen Mudstone Formation1
- Etchegoin Formation1
- San Diego Formation1
Loading coastlines…
The named rock units Opalia varicostata has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Opalia varicostata and its relatives
PlioceneWhere Opalia varicostata and its relatives were recorded in the Pliocene.
Found in the same rock
216 taxa- Dendostrea vespertina7 sites
- Lyropecten cerrosensis5 sites
- Asperiscala minuticosta4 sites
- Patinopecten healeyi4 sites
- Anadara trilineata3 sites
- Argopecten invalidus3 sites
- Caesia3 sites
- Calicantharus fortis3 sites
- Chlamys hastata3 sites
- Lirobittium casmaliense3 sites
- Lucinisca nuttalli3 sites
- Lucinoma annulata3 sites
- Romaleon antennarium3 sites
- Saccella taphria3 sites
- Tamiosoma gregaria3 sites
- Turritella cooperi3 sites
- Argopecten purpuratus2 sites
- Balanus (Balanus) kanakoffi2 sites
- Balanus (Hesperibalanus) proinus2 sites
- Callianax baetica2 sites
- Callithaca tenerrima2 sites
- Cancellaria arnoldi2 sites
- Cetolepas hertleini2 sites
- Compsomyax subdiaphana2 sites
The Paleobiology Database records 11 sites for Opalia varicostata, 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
6 references- On the reconciliation of biostratigraphy and strontium isotope stratigraphy of three southern Californian Plio-Pleistocene formations3
- The family Epitoniidae (Mollusca: Gastropoda) in the northeastern Pacific3
- Geology and paleontology of the Santa Maria District California3
- Geology of the eastern part of the Santa Monica Mountains, Los Angeles County, California1
- Pliocene deposits north of Simi Valley, California1
- The Etchegoin Pliocene of middle California1
Each of the 12 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. 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 Opalia varicostata
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Opalia varicostata 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itOpalia through timeFormations of the PlioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Stearns 1875)