Pentagnostus

Pentagnostus is a genus of small, blind, agnostid trilobites restricted to the Middle Cambrian. Its remains have been found in Siberia, Australia, North America, Scandinavia, and Kazakhstan.

Pentagnostus

Dwergenpaartje · CC BY-SA 3.0 · via Wikipedia/Commons. 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
PeronopsidaePBDB
Diet
suspension feederPBDB, for Agnostoidea
Life habit
nektonicPBDB, for Agnostoidea
Motility
actively mobilePBDB, for Agnostoidea
Vision
blindPBDB, for Peronopsidae
Environment
marinePBDB, for Agnostoidea

Time the record covers

At least 12 million years on record.

The record covers at least 509.7 Mya to 497 Mya. No occurrence read is dated outside 515.3 Mya to 486.85 Mya.

Cambrian — about 79 of 79 occurrencesCambrianOrdovician — about 0 of 79 occurrences516–515 Mya — about 0.4 occurrences515–514 Mya — about 0.9 occurrences514–513 Mya — about 0.9 occurrences513–512 Mya — about 0.9 occurrences512–511 Mya — about 1 occurrence511–510 Mya — about 2 occurrences510–509 Mya — about 7 occurrences509–508 Mya — about 9 occurrences508–507 Mya — about 10 occurrences507–506 Mya — about 11 occurrences506–505 Mya — about 10 occurrences505–504 Mya — about 5 occurrences504–503 Mya — about 4 occurrences503–502 Mya — about 4 occurrences502–501 Mya — about 3 occurrences501–500 Mya — about 3 occurrences500–499 Mya — about 2 occurrences499–498 Mya — about 2 occurrences498–497 Mya — about 2 occurrences497–496 Mya — about 0.3 occurrences496–495 Mya — about 0.1 occurrences495–494 Mya — about 0.1 occurrences494–493 Mya — about 0.1 occurrences493–492 Mya — about 0.1 occurrences492–491 Mya — about 0.1 occurrences491–490 Mya — about 0.1 occurrences490–489 Mya — about 0.1 occurrences489–488 Mya — about 0.1 occurrences488–487 Mya — about 0.1 occurrences487–486 Mya — about 0.0 occurrences509.7 Mya497 Mya515.9 Mya486.3 Mya

79 occurrences of Pentagnostus 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

79 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

16 formations

Burgess Shale — 51.44°N, 116.47°WBurgess Shale — 51.03°N, 115.83°WBurgess Shale — 51.38°N, 116.43°WAktas — 43.53°N, 69.95°EArthur Creek — 21.75°S, 135.71°EArthur Creek — 22.26°S, 136.04°ELead Bell Shale — 42.00°N, 112.00°WShallow Bay — 49.83°N, 57.87°WShallow Bay — 49.02°N, 55.52°WWheeler Shale — 39.54°N, 112.92°WWheeler Shale — 39.29°N, 113.31°WWheeler — 39.52°N, 113.00°WCarrara — 37.35°N, 116.13°WCarrara — 37.45°N, 115.73°WEmigrant — 37.72°N, 117.44°WEmigrant — 37.79°N, 117.44°WCoonigan — 31.17°S, 141.32°EMarjum — 39.22°N, 113.40°WMarjum — 39.27°N, 113.31°WLangston — 42.20°N, 112.25°WEl Gavilán — 29.28°N, 110.58°WLakeview — 47.97°N, 116.43°WSecret Canyon — 39.40°N, 115.95°WStephen — 51.18°N, 116.08°W

Loading coastlines…

The named rock units Pentagnostus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Pentagnostus and its relatives

Cambrian

Where Pentagnostus and its relatives were recorded in the Cambrian.

Found in the same rock

471 taxa

The Paleobiology Database records 61 sites for Pentagnostus, 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

23 references

Each of the 79 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. 11 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 Pentagnostus

Credit
Dwergenpaartje
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Pentagnostus 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.

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 itPeronopsidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lermontova 1940