Calmonia

Calmonia is an extinct genus of trilobites. It contains one species: C. curvioculata. Fossils of Calmonia have been found in the Emsian to Eifelian Ponta Grossa Formation and Chapada Group of Brazil, the Belén and Sica Sica Formations of Bolivia and the Cordobés Formation of Uruguay.

Agriopis marginaria (Fabricius), a relative of Calmonia — not Calmonia itself

Not Calmonia. This is Agriopis marginaria (Fabricius), a relative.

via GBIF · 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
CalmoniidaePBDB
Diet
carnivorePBDB, for Phacopina
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Calmoniidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 23 million years on record.

Every occurrence read is dated to somewhere between 410.62 Mya and 387.95 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Devonian — about 10 of 10 occurrencesDevonian411–410 Mya — about 0.1 occurrences410–410 Mya — about 0.4 occurrences410–409 Mya — about 0.4 occurrences409–408 Mya — about 0.4 occurrences408–407 Mya — about 0.4 occurrences407–406 Mya — about 0.4 occurrences406–406 Mya — about 0.4 occurrences406–405 Mya — about 0.4 occurrences405–404 Mya — about 0.4 occurrences404–403 Mya — about 0.4 occurrences403–402 Mya — about 0.4 occurrences402–402 Mya — about 0.4 occurrences402–401 Mya — about 0.4 occurrences401–400 Mya — about 0.4 occurrences400–399 Mya — about 0.4 occurrences399–398 Mya — about 0.4 occurrences398–398 Mya — about 0.4 occurrences398–397 Mya — about 0.4 occurrences397–396 Mya — about 0.4 occurrences396–395 Mya — about 0.4 occurrences395–395 Mya — about 0.4 occurrences395–394 Mya — about 0.4 occurrences394–393 Mya — about 0.3 occurrences393–392 Mya — about 0.2 occurrences392–391 Mya — about 0.2 occurrences391–391 Mya — about 0.2 occurrences391–390 Mya — about 0.2 occurrences390–389 Mya — about 0.2 occurrences389–388 Mya — about 0.2 occurrences388–387 Mya — about 0.1 occurrences411.1 Mya387.4 Mya

10 occurrences of Calmonia on record, most of them in the Devonian. 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

10 occurrences

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

4 formations

Ponta Grossa — 24.25°S, 49.70°WPonta Grossa — 26.07°S, 52.58°WPonta Grossa — 25.08°S, 50.15°WPonta Grossa — 24.50°S, 50.40°WBelen — 15.50°S, 68.00°WSica Sica — 15.50°S, 68.00°WCordobes — 33.00°S, 55.00°W

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The named rock units Calmonia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Calmonia and its relatives

Devonian

Where Calmonia and its relatives were recorded in the Devonian.

Found in the same rock

81 taxa

The Paleobiology Database records 10 sites for Calmonia, 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

2 references

Each of the 10 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 Agriopis marginaria (Fabricius)

Source
GBIF
Credit
via GBIF
Licence
CC0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itCalmoniidae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Clarke 1913