Opis
via iDigBio · CC BY-NC-ND · 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
- OpinaePBDB
- Diet
- suspension feederPBDB, for Crassatelloidea
- Life habit
- infaunalPBDB, for Crassatelloidea
- Motility
- facultatively mobilePBDB, for Crassatelloidea
- Vision
- blindPBDB, for Crassatelloidea
- Environment
- marinePBDB, for Crassatelloidea
Time the record covers
At least 175 million years on record.
The record covers at least 241.464 Mya to 66 Mya. No occurrence read is dated outside 247 Mya to 56 Mya.
174 occurrences of Opis on record, most of them in the Late Cretaceous. 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
174 occurrences- Middle Triassic3%
- Late Triassic6%
- Early Jurassic3%
- Middle Jurassic13%
- Late Jurassic25%
- Early Cretaceous12%
- Late Cretaceous36%
- Paleocene1%
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
70 formations
- Ladd Formation13
- Coral Rag de Trouville Formation7
- Moreno Formation · Great Valley Group6
- Calcaires pseudo-oolithiques superieurs Formation6
- Trigonia clavellata Formation5
- Grès verts helvétiques Formation4
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The named rock units Opis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 46 further formations hold fewer occurrences each and are not listed. 36 occurrences have no formation on record, which is common for older literature.
Opis and its relatives
Late CretaceousWhere Opis and its relatives were recorded in the Late Cretaceous.
Found in the same rock
2,310 taxa- Nanogyra (Nanogyra) nana30 sites
- Plagiostoma28 sites
- Protocardia25 sites
- Isocyprina22 sites
- Astarte21 sites
- Cucullaea21 sites
- Pseudomelania20 sites
- Modiolus19 sites
- Radulopecten fibrosus19 sites
- Serpula19 sites
- Plicatula17 sites
- Radulopecten17 sites
- Chlamys15 sites
- Pholadomya15 sites
- Pleuromya uniformis14 sites
- Actinostreon gregarea13 sites
- Nerinella13 sites
- Pleurotomaria13 sites
- Anisocardia12 sites
- Arca12 sites
- Isognomon12 sites
- Lima12 sites
- Liostrea12 sites
- Lucina12 sites
The Paleobiology Database records 138 sites for Opis, 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
63 references- Cretaceous opine bivalves from the pacific slope of North America and palaeobiogeography of subfamily Opinae Chavan, 196926
- Unpublished data25
- A systematic survey of the Mesozoic Bivalvia from Japan11
- Geologie, Paleontologie et Paleoecologie du Bathonien au sud-ouest du Massif Ardennais10
- Unpublished data on Cretaceous-Paleocene molluscan assemblages7
- Les grès verts helvétiques (Aptien moyen-Albien supérieur) de Haute-Savoie, Valais et Vaud (Alpes occidentales franco-suisses)5
- Water depth indications from Late Cretaceous mollusks, Santa Ana Mountains, California5
- Maastrichtian non-cephalopod mollusks: Scaphopoda, Gastropoda and Bivalvia of the Middle Vistula Valley, central Poland4
- A Middle Triassic Cassian‐type fauna (Pelsa‐Vazzoler Lagerstätte) and the adaptive radiation of the Modern evolutionary fauna3
- Die Muschelfauna der Nayband-Formation (Obertrias, Nor - Rhät) des östlichen Zentraliran3
- Zur Pelecypodenfauna der Neuburger Bankkalke (Mittel-Tithon)3
- Upper Cretaceous of the Pacific Coast3
Each of the 174 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. 51 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 content1
Picture of Opis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC BY-NC-ND
- Commercial use
- the licence does not allow it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itOpinae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Defrance 1824)