Gymnagnostus

Gymnagnostus is a genus of trilobites in the order Agnostida, which existed in what is now Oaxaca, Mexico. It was described by Robison and Pantoja-Alor, in 1968, and the type species is Gymnagnostus gongros.

No picture of Gymnagnostus was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Gymnagnostus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
AgnostidaePBDB
Diet
detritivorePBDB, for Agnostida
Life habit
epifaunalPBDB, for Agnostida
Motility
slow-movingPBDB, for Agnostida
Vision
blindPBDB, for Agnostidae

Time the record covers

At least 450 thousand years on record.

The record covers at least 486.85 Mya to 486.4 Mya. No occurrence read is dated outside 497 Mya to 477.1 Mya.

Cambrian — about 27 of 38 occurrencesCambrianOrdovician — about 11 of 38 occurrencesOrdovician498–497 Mya — about 0.4 occurrences497–496 Mya — about 2 occurrences496–495 Mya — about 2 occurrences495–495 Mya — about 2 occurrences495–494 Mya — about 2 occurrences494–493 Mya — about 2 occurrences493–493 Mya — about 2 occurrences493–492 Mya — about 2 occurrences492–491 Mya — about 2 occurrences491–491 Mya — about 2 occurrences491–490 Mya — about 2 occurrences490–489 Mya — about 2 occurrences489–488 Mya — about 2 occurrences488–488 Mya — about 2 occurrences488–487 Mya — about 2 occurrences487–486 Mya — about 0.9 occurrences486–486 Mya — about 0.8 occurrences486–485 Mya — about 0.8 occurrences485–484 Mya — about 0.8 occurrences484–484 Mya — about 0.8 occurrences484–483 Mya — about 0.8 occurrences483–482 Mya — about 0.8 occurrences482–481 Mya — about 0.8 occurrences481–481 Mya — about 0.8 occurrences481–480 Mya — about 0.8 occurrences480–479 Mya — about 0.8 occurrences479–479 Mya — about 0.8 occurrences479–478 Mya — about 0.8 occurrences478–477 Mya — about 0.8 occurrences477–477 Mya — about 0.2 occurrences486.85 Mya – 486.4 Mya497.5 Mya476.6 Mya

38 occurrences of Gymnagnostus on record. 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

38 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

6 formations

Lampazar — 23.15°S, 65.60°WLampazar — 23.88°S, 65.71°WLampazar — 23.62°S, 65.69°WLampazar — 22.92°S, 66.62°WVolcancito — 28.87°S, 67.75°WSanta Rosita — 22.76°S, 65.20°WSanta Rosita — 22.66°S, 65.17°WTinu — 17.37°N, 97.17°WTinu — 17.03°N, 96.57°WGreen Point — 49.84°N, 57.87°WRabbitkettle — 61.78°N, 127.95°W

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The named rock units Gymnagnostus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Found in the same rock

81 taxa

The Paleobiology Database records 34 sites for Gymnagnostus, 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

9 references

Each of the 38 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. 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 content0

No picture of Gymnagnostus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Gymnagnostus, or no answer at all. This entry cannot say which.

No 3D scan of Gymnagnostus 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.

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 itAgnostidae through timeThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Robison and Pantoja-Alor 1968