Meekoceras gracilitatis

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
- MeekocerasPBDB
- Diet
- carnivorePBDB, for Ceratitida
- Life habit
- nektonicPBDB, for Ceratitida
- Motility
- actively mobilePBDB, for Ceratitida
- Vision
- well-developedPBDB, for Cephalopoda
- Environment
- marinePBDB, for Cephalopoda
Time the record covers
At most 5 million years on record.
Every occurrence read is dated to somewhere between 251.902 Mya and 247 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
78 occurrences of Meekoceras gracilitatis on record, most of them in the Early 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
78 occurrences- Early Triassic100%
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
11 formations
- Thaynes Formation31
- Upper Ceratite Limestone Formation11
- Blind Fiord Formation7
- Hongshuichuanqun Formation3
- Sinbad Formation3
- Union Wash Formation2
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The named rock units Meekoceras gracilitatis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 15 occurrences have no formation on record, which is common for older literature.
Meekoceras gracilitatis and its relatives
Early TriassicWhere Meekoceras gracilitatis and its relatives were recorded in the Early Triassic.
Found in the same rock
204 taxa- Pseudosageceras multilobatum22 sites
- Owenites koeneni18 sites
- Lanceolites compactus17 sites
- Aspenites acutus16 sites
- Paranannites aspenensis14 sites
- Arctoceras tuberculatum13 sites
- Juvenites septentrionalis12 sites
- Parussuria compressa12 sites
- Wyomingites aplanatus12 sites
- Euflemingites cirratus11 sites
- Anaflemingites silberlingi10 sites
- Dieneroceras dieneri10 sites
- Juvenites thermarum9 sites
- Preflorianites toulai9 sites
- Anaflemingites russelli8 sites
- Inyoites oweni8 sites
- Juvenites8 sites
- Arctoceras blomstrandi7 sites
- Paranannites slossi7 sites
- Hedenstroemia kossmati6 sites
- Juvenites dieneri6 sites
- Paranannites mulleri6 sites
- Wyomingites arnoldi6 sites
- Abrekites arthaberi5 sites
The Paleobiology Database records 63 sites for Meekoceras gracilitatis, 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
22 references- Smithian ammonoid faunas from Utah: implications for Early Triassic biostratigraphy, correlation and basinal paleogeography17
- Lower Triassic ammonoids of North America12
- Smithian (Early Triassic) ammonoids from the Salt Range, Pakistan10
- New Smithian (Early Triassic) ammonoids from Crittenden Springs, Elko County, Nevada: implications for taxonomy, biostratigraphy and biogeography6
- Canadian Triassic Ammonoid Faunas5
- Triassic Ammonoid succession in South Primorye: 1. Lower Olenekian Hedenstroemia bosphorensis and Anasibirites nevolini Zones3
- Early Olenekian ammonoids of Siberia3
- Cephalopoda3
- Ammonites from the Meekoceras graciliatus zone at Crittenden Spring, Elk County, Nevada3
- Triassic stratigraphy and faunas, Queen Elizabeth Islands, Arctic Archipelago2
- The Triassic cephalopod genera of America2
- Paleontological papers no. 9: fossils of the Jura-Trias of southeastern Idaho2
Each of the 78 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. 10 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 Meekoceras gracilitatis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Meekoceras gracilitatis 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 itMeekoceras through timeFormations of the Early TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. White 1879