Grammatodon

ValentinaFernandez0205 · CC BY-SA 4.0 · via Wikidata/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
- GrammatodontinaePBDB
- Diet
- suspension feederPBDB, for Parallelodontidae
- Life habit
- low-level epifaunalPBDB, for Parallelodontidae
- Motility
- facultatively mobile, attachedPBDB, for Parallelodontidae
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 387 million years on record.
The record covers at least 387.95 Mya to 129 ka. No occurrence read is dated outside 538.8 Mya to 11.7 ka.
878 occurrences of Grammatodon on record, most of them in the Middle Jurassic. 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
878 occurrences- Cambrianunder 1%
- Ordovicianunder 1%
- Silurianunder 1%
- Devonian2%
- Carboniferousunder 1%
- Permian1%
- Early Triassicunder 1%
- Middle Triassic1%
- Late Triassicunder 1%
- Early Jurassic24%
- Middle Jurassic30%
- Late Jurassic28%
- Early Cretaceous4%
- Late Cretaceous7%
- Paleoceneunder 1%
- Pleistoceneunder 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
157 formations
- Chari Formation134
- Kap Leslie Formation55
- Turmiel Fm Formation25
- Alcobaca Formation24
- Neuburg Formation21
- Habo beds Formation20
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The named rock units Grammatodon has been recovered from, largest first. Drawn where the rock is now, not where it formed. 133 further formations hold fewer occurrences each and are not listed. 208 occurrences have no formation on record, which is common for older literature.
Grammatodon and its relatives
Middle JurassicWhere Grammatodon and its relatives were recorded in the Middle Jurassic.
Found in the same rock
958 taxa- Isocyprina61 sites
- Protocardia striatula59 sites
- Camptonectes55 sites
- Astarte51 sites
- Entolium orbiculare49 sites
- Nanogyra (Nanogyra) nana49 sites
- Pleuromya uniformis46 sites
- Isognomon45 sites
- Ammonoidea44 sites
- Protocardia43 sites
- Plagiostoma40 sites
- Buchia mosquensis39 sites
- Mesosaccella39 sites
- Serpula39 sites
- Belemnitida38 sites
- Thracia depressa38 sites
- Corbulomima37 sites
- Myophorella36 sites
- Nicaniella36 sites
- Pseudomelania36 sites
- Hartwellia33 sites
- Pleuromya33 sites
- Taimyrothyris33 sites
- Modiolus32 sites
The Paleobiology Database records 660 sites for Grammatodon, and this reads 240 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
149 references- Unpublished data from Kachchh146
- Unpublished data76
- Palökologie benthischer Faunen aus dem Unter-Toarc SW-Europas54
- Genesis and environmental significance of Upper Cretaceous shell concentrations from the Cauvery Basin, southern India41
- Temperature-related body size change of marine benthic macroinvertebrates across the Early Toarcian Anoxic Event27
- A systematic survey of the Mesozoic Bivalvia from Japan22
- Zur Pelecypodenfauna der Neuburger Bankkalke (Mittel-Tithon)22
- Jurassic Bivalvia and Gastropoda from Tanganyika and Kenya21
- Habo Beds near Ler (Kutch): Pt. 3 - Biostratigraphy of the beds on the east of Ler20
- Relative taxonomic and ecological stability in Devonian marine faunas of New York State: a test of coordinated stasis19
- The Impact of Global Warming and Anoxia on Marine Benthic Community Dynamics: an Example from the Toarcian (Early Jurassic)18
- The Jurassic and Lower Cretaceous of Wadi Hajar, southern Yemen17
Each of the 878 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. 137 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 Grammatodon
- Source
- Wikidata/Commons
- Credit
- ValentinaFernandez0205
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows 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 itGrammatodontinae through timeFormations of the Middle JurassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Meek and Hayden 1860