Trocholites ammonius

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
- TrocholitesPBDB
- Diet
- carnivorePBDB, for Cephalopoda
- Life habit
- nektobenthicPBDB, for Tarphycerida
- Motility
- fast-movingPBDB, for Cephalopoda
- Vision
- well-developedPBDB, for Cephalopoda
- Environment
- marinePBDB, for Cephalopoda
Time the record covers
At most 7.7 million years on record.
Every occurrence read is dated to somewhere between 457.3 Mya and 449.6 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
6 occurrences of Trocholites ammonius on record, most of them in the Ordovician. 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
6 occurrences- Ordovician100%
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
3 formations
- Denley Limestone Formation · Lower Trenton Group4
- Amadjuak Formation1
- Lindsay Formation · Simcoe Group1
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The named rock units Trocholites ammonius has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Trocholites ammonius and its relatives
OrdovicianWhere Trocholites ammonius and its relatives were recorded in the Ordovician.
Found in the same rock
143 taxa- Endoceras proteiforme6 sites
- Flexicalymene (Flexicalymene) senaria5 sites
- Isotelus gigas5 sites
- Ordogeisonoceras amplicameratum5 sites
- Paucicrura rogata5 sites
- Prasopora5 sites
- Sinuites cancellatus5 sites
- Ctenodonta peracuta4 sites
- Cyrtorizoceras4 sites
- Geisonoceras4 sites
- Lichenocrinus4 sites
- Oncoceras4 sites
- Amorphognathus3 sites
- Amplexopora3 sites
- Bythopora3 sites
- Cameroceras trentonense3 sites
- Dapsilodus mutatus3 sites
- Dekayia3 sites
- Dendrocystites3 sites
- Distacodus3 sites
- Drepanoistodus suberectus3 sites
- Eridotrypa mutabilis3 sites
- Glossina riciniformis3 sites
- Graptodictya3 sites
The Paleobiology Database records 6 sites for Trocholites ammonius, 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
4 references- Fossil Communities of the Middle Trenton Group (Ordovician) of New York State2
- Fossil communities of the lower Trenton Group (Middle Ordovician) of central and northwestern New York State2
- Palaeozoic geology of the Lake Simcoe Area, Ontario1
- Ordovician cephalopod fauna of Baffin Island1
Each of the 6 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 Trocholites ammonius
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Trocholites ammonius 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 itTrocholites through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Conrad 1838