Ammagnostidae

Ammagnostidae is a family of trilobites in the suborder Agnostina, small, eyeless, isopygous trilobites with a thorax consisting of 2 segments only. Four genera have been assigned to it:

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

On record

Recorded, not inferred
Sits inside
CondylopygoideaPBDB
Diet
detritivorePBDB, for Agnostida
Life habit
epifaunalPBDB, for Agnostida
Motility
slow-movingPBDB, for Agnostida

Time the record covers

At least 9.3 million years on record.

The record covers at least 504.5 Mya to 495.2 Mya. No occurrence read is dated outside 506.5 Mya to 486.85 Mya.

Cambrian — about 223 of 223 occurrencesCambrianOrdovician — about 0 of 223 occurrences507–506 Mya — about 0.2 occurrences506–506 Mya — about 0.8 occurrences506–505 Mya — about 0.8 occurrences505–504 Mya — about 2 occurrences504–504 Mya — about 4 occurrences504–503 Mya — about 5 occurrences503–502 Mya — about 9 occurrences502–501 Mya — about 9 occurrences501–501 Mya — about 9 occurrences501–500 Mya — about 17 occurrences500–499 Mya — about 24 occurrences499–499 Mya — about 32 occurrences499–498 Mya — about 33 occurrences498–497 Mya — about 33 occurrences497–497 Mya — about 18 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 occurrences491–490 Mya — about 2 occurrences490–490 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 0.4 occurrences504.5 Mya495.2 Mya507 Mya486.4 Mya

223 occurrences of Ammagnostidae 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

223 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

34 formations

Huaqiao — 28.39°N, 109.53°EHuaqiao — 28.72°N, 109.97°EHuaqiao — 29.10°N, 110.92°EZhumabai — 43.53°N, 69.95°EAktas — 43.53°N, 69.95°EDeadwood — 44.25°N, 103.78°WDeadwood — 44.28°N, 103.73°WDeadwood — 44.25°N, 103.57°WDeadwood — 44.07°N, 103.22°WDeadwood — 44.45°N, 104.42°WHolm Dal — 82.42°N, 39.75°WSpurs — 71.34°S, 163.21°EMachari — 37.31°N, 128.44°EWeeks — 39.22°N, 113.34°WWeeks — 39.22°N, 113.40°WRabbitkettle — 62.70°N, 128.38°WMungerebar — 22.92°S, 138.80°EKurgiakh — 33.17°N, 77.18°EKurgiakh — 33.07°N, 77.25°EHuayansi — 28.88°N, 118.48°EHuayansi — 28.82°N, 118.60°ELabaz — 68.00°N, 88.82°ELongha — 23.26°N, 105.54°EMarjum — 39.27°N, 113.31°WDresbach — 44.52°N, 89.57°WDuNoir — 43.28°N, 109.83°WTandoshinskaya — 51.97°N, 85.97°EMarjum and Weeks — 39.22°N, 113.45°WMila — 36.11°N, 50.63°EMachari — 37.33°N, 128.45°EVal d'Homs — 43.00°N, 2.00°E"Dolodrook River Limestone" — 37.60°S, 146.63°EConasauga — 33.00°N, 87.00°W

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The named rock units Ammagnostidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 further formations hold fewer occurrences each and are not listed. 6 occurrences have no formation on record, which is common for older literature.

Ammagnostidae and its relatives

Cambrian

Where Ammagnostidae and its relatives were recorded in the Cambrian.

Found in the same rock

502 taxa

The Paleobiology Database records 56 sites for Ammagnostidae, 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

35 references

Each of the 223 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. 23 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 content0

No picture of Ammagnostidae was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

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

No 3D scan of Ammagnostidae 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.

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 itCondylopygoidea through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Opik 1967)