Pseudohystricurus obesus

Yale Peabody Museum · CC0 · 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
- PseudohystricurusPBDB
- Diet
- deposit feederPBDB, for Proetida
- Life habit
- low-level epifaunalPBDB, for Trilobita
- Motility
- fast-movingPBDB, for Trilobita
- Vision
- well-developedPBDB, for Dimeropygidae
- Environment
- marinePBDB, for Trilobita
Time the record covers
At most 9.8 million years on record.
Every occurrence read is dated to somewhere between 486.85 Mya and 477.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
2 occurrences of Pseudohystricurus obesus 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
2 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
2 formations
- Garden City Formation1
- Green Point Formation · Cow Head Group1
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The named rock units Pseudohystricurus obesus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Pseudohystricurus obesus and its relatives
OrdovicianWhere Pseudohystricurus obesus and its relatives were recorded in the Ordovician.
Found in the same rock
20 taxa- Amblycranium cornutum1 site
- Flectihystricurus acumennasus1 site
- Flectihystricurus flectimembrus1 site
- Goniophrys prima1 site
- Hillyardina marginauctum1 site
- Hillyardina semicylindrica1 site
- Hypothetica rawi1 site
- Hystricurus contractus1 site
- Hystricurus oculilunatus1 site
- Neoagnostus aspidoides1 site
- Pachycranium faciclunis1 site
- Parahystricurus fraudator1 site
- Parahystricurus oculirotundus1 site
- Parahystricurus pustulosus1 site
- Pseudoclelandia cornupsittaca1 site
- Pseudoclelandia fluxafissura1 site
- Pyraustocranium orbatum1 site
- Rossaspis superciliosa1 site
- Symphysurina walcotti1 site
- Tulepyge paucituberculata1 site
The Paleobiology Database records 2 sites for Pseudohystricurus obesus, and this reads all of them. The number is how many of those sites it was catalogued from too.
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
2 references- Cambrian-Ordovician boundary sections in the Cow Head Group, western Newfoundland1
- Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas1
Each of the 2 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. Each entry links to the Paleobiology Database's own record for the work.
Media and terms
Media content1

Picture of Pseudohystricurus obesus
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Pseudohystricurus obesus was found in Smithsonian Open Access and Sketchfab.
MorphoSource 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 itPseudohystricurus through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ross 1951