Tomagnostella

Angelin Nils Petter · CC BY 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
- SpinagnostidaePBDB
- Diet
- detritivorePBDB, for Agnostida
- Life habit
- epifaunalPBDB, for Agnostida
- Motility
- slow-movingPBDB, for Agnostida
- Vision
- blindPBDB, for Spinagnostidae
Time the record covers
At least 5.3 million years on record.
The record covers at least 500.5 Mya to 495.2 Mya. No occurrence read is dated outside 506.5 Mya to 486.85 Mya.
120 occurrences of Tomagnostella on record, most of them in the Cambrian. 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
120 occurrences- Cambrian100%
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
17 formations
- Zhumabai Formation37
- Huaqiao Formation31
- Huayansi Formation13
- Aktas Formation12
- Holm Dal Formation · Tavsens Iskappe Group9
- Yangliugang Formation3
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The named rock units Tomagnostella has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Tomagnostella and its relatives
CambrianWhere Tomagnostella and its relatives were recorded in the Cambrian.
Found in the same rock
287 taxa- Linnarssonia12 sites
- Hypagnostus parvifrons11 sites
- Acidusus aculeatus10 sites
- Kormagnostus seclusus10 sites
- Modocia10 sites
- Lejopyge laevigatus9 sites
- Lejopyge armata8 sites
- Clavagnostus repandus7 sites
- Hemirhodon7 sites
- Hypagnostus brevifrons7 sites
- Lisogoragnostus mictus7 sites
- Pearylandia7 sites
- Agnostus6 sites
- Catillicephala rotunda6 sites
- Goniagnostus nathorsti6 sites
- Linnarssonia ophirensis6 sites
- Marjumia6 sites
- Onchonotopsis6 sites
- Ammagnostus5 sites
- Ammagnostus laiwuensis5 sites
- Bynumia5 sites
- Cedaria5 sites
- Conopolus granulus5 sites
- Diplagnostus planicauda5 sites
The Paleobiology Database records 33 sites for Tomagnostella, 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
18 references- Ergaliev and Ergaliev, 200849
- Agnostid biostratigraphy across the Middle-Upper Cambrian boundary in Hunan, China21
- Proposed GSSP for the base of Cambrian Stage 9, coinciding with the first appearance of Agnostotes orientalis, at Duibian, Zhejiang, China9
- Molluscs of the Holm Dal Formation (late Middle Cambrian), central North Greenland9
- The Global Boundary Stratotype Section and Point (GSSP) of the Guzhangian Stage (Cambrian) in the Wuling Mountains, northwestern Hunan, China7
- The Cambrian trilobites of western Zhejiang7
- Middle Cambrian stratigraphy and trilobite fauna of Taoyuan, NW Hunan3
- Cambrian Trilobites from the Parahio and Zanskar Valleys, Indian Himalaya2
- Cambrian Agnostid trilobites from Mendoza, Argentina: A systematic revision and biostratigraphic implications2
- Trilobites of the Marjuman and Steptoean stages (Upper Cambrian), Rabbitkettle Formation, southern Mackenzie Mountains, northwest Canada2
- Trilobites from the Middle-Upper Cambrian boundary beds of Altai2
- Middle Cambrian agnostoids and trilobites from the Lower Allochthon, Swedish Caledonides1
Each of the 120 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. 6 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 Tomagnostella
- Source
- GBIF
- Credit
- Angelin Nils Petter
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Tomagnostella 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 itSpinagnostidae through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Kobayashi 1939