Modiolus gracilis

loisstephens1 · CC BY-NC 4.0 · via GBIF. 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
- ModiolusPBDB
- Diet
- suspension feederPBDB, for Modiolus
- Life habit
- semi-infaunalPBDB, for Modiolus
- Motility
- stationary, attached, epibiontPBDB, for Modiolus
- Vision
- blindPBDB, for Bivalvia
- Environment
- lagoonal,coastal,inner shelf,outer shelf,oceanic,brackish,freshwaterPBDB, for Mytilidae
Time the record covers
At least 9.7 million years on record.
The record covers at least 237 Mya to 227.3 Mya. No occurrence read is dated outside 239.48 Mya to 205.7 Mya.
10 occurrences of Modiolus gracilis on record, most of them in the Late Triassic. 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
10 occurrencesThese 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
- Cassian Formation4
- Bechateur Formation1
- Fődolomit Formation1
- Födolomit Formation1
- Raibl Formation1
- Sciliar Formation1
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The named rock units Modiolus gracilis 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.
Modiolus gracilis and its relatives
Late TriassicWhere Modiolus gracilis and its relatives were recorded in the Late Triassic.
Found in the same rock
471 taxa- Zygopleura5 sites
- Cassianella decussata4 sites
- Cidaris alata4 sites
- Coelostylina conica4 sites
- Echinoidea4 sites
- Gervillia (Cultriopsis) angusta4 sites
- Hologyra expansa4 sites
- Lima4 sites
- Neritopsis4 sites
- Zygopleura tenuis4 sites
- Allostrophia perversa3 sites
- Balanocidaris3 sites
- Bivalvia3 sites
- Cassianella ampezzana3 sites
- Cassianella beyrichii3 sites
- Cassianopsis armata3 sites
- Cassianopsis decussata3 sites
- Chelocrinus cassianus3 sites
- Cidaris admeto3 sites
- Coelostylina cochlea3 sites
- Coelostylina crassa3 sites
- Costatoria inaequicostata3 sites
- Eucycloscala3 sites
- Gastropoda3 sites
The Paleobiology Database records 9 sites for Modiolus gracilis, 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
7 references- Primary collection data of Cassian Formation used for publication of Fürsich and Wendt (1977) (ref. 9188)2
- Triassische Megalodontaceae - Entwicklung, Stratigraphie und Palaontologie2
- Biostratinomy and palaeoecology of the Cassian Formation (Triassic) of the Southern Alps2
- A Middle Triassic Cassian‐type fauna (Pelsa‐Vazzoler Lagerstätte) and the adaptive radiation of the Modern evolutionary fauna1
- Triassic palaeogeography of Tunisia1
- Das Grödener-, Fassa- und Enneberggebiet in den Südtiroler Dolomiten: Geologische Beschreibung mit besonderer Berücksichtigung der Überschiebungserscheinungen. Teil III. Paläontologie1
- Revision der Lamellibranchiaten von St. Cassian1
Each of the 10 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 Modiolus gracilis
- Source
- GBIF
- Credit
- loisstephens1
- Licence
- CC BY-NC 4.0
- Commercial use
- the licence does not allow it
No 3D scan of Modiolus gracilis 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itModiolus through timeFormations of the Late TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Klipstein 1843)