Homagnostus

Homagnostus is a genus of trilobites in the order Agnostida, which existed in what is now north Wales. It was described by Howell in 1935. The genus was originally considered to be Agnostus pisiformis var. obesus.

No picture of Homagnostus 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 Homagnostus, 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 13 million years on record.

The record covers at least 499.5 Mya to 486.4 Mya. No occurrence read is dated outside 538.8 Mya to 477.1 Mya.

Cambrian — about 187 of 189 occurrencesCambrianOrdovician — about 2 of 189 occurrencesOrdovician540–538 Mya — about 0.3 occurrences538–536 Mya — about 0.7 occurrences536–534 Mya — about 0.7 occurrences534–531 Mya — about 0.7 occurrences531–529 Mya — about 0.7 occurrences529–527 Mya — about 0.7 occurrences527–525 Mya — about 0.7 occurrences525–523 Mya — about 0.7 occurrences523–521 Mya — about 0.7 occurrences521–519 Mya — about 0.7 occurrences519–517 Mya — about 0.7 occurrences517–514 Mya — about 0.7 occurrences514–512 Mya — about 0.7 occurrences512–510 Mya — about 0.7 occurrences510–508 Mya — about 0.7 occurrences508–506 Mya — about 0.8 occurrences506–504 Mya — about 1 occurrence504–502 Mya — about 2 occurrences502–499 Mya — about 3 occurrences499–497 Mya — about 3 occurrences497–495 Mya — about 51 occurrences495–493 Mya — about 60 occurrences493–491 Mya — about 21 occurrences491–489 Mya — about 19 occurrences489–487 Mya — about 15 occurrences487–484 Mya — about 0.5 occurrences484–482 Mya — about 0.6 occurrences482–480 Mya — about 0.6 occurrences480–478 Mya — about 0.6 occurrences478–476 Mya — about 0.2 occurrences499.5 Mya486.4 Mya540 Mya476 Mya

189 occurrences of Homagnostus 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

189 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

37 formations

Zhumabai — 43.53°N, 69.95°EMachari — 37.31°N, 128.44°ENopah — 40.00°N, 115.00°WNopah — 39.00°N, 116.00°WNopah — 36.32°N, 116.99°WNopah — 36.58°N, 117.10°WChangshan — 35.62°N, 118.90°EChangshan — 36.03°N, 117.68°EChangshan — 36.50°N, 116.83°EChangshan — 35.42°N, 114.05°EChangshan — 39.77°N, 118.40°EChangshan — 39.62°N, 122.00°EChangshan — 39.75°N, 118.32°EAlum Shale — 58.58°N, 13.38°EAlum Shale — 58.55°N, 13.33°EAlum Shale — 56.35°N, 16.42°ERabbitkettle — 62.70°N, 128.38°WShallow Bay — 49.83°N, 57.87°WShallow Bay — 49.83°N, 57.85°WOrr — 36.17°N, 115.14°WOrr — 39.74°N, 113.41°WHuayansi — 28.82°N, 118.60°EWoods Hollow Boulders — 30.20°N, 103.24°WWoods Hollow Boulders — 30.03°N, 103.31°WDeadwood — 44.28°N, 103.73°WDeadwood — 44.77°N, 107.53°WHuaqiao — 28.05°N, 109.42°EHuaqiao — 29.10°N, 110.92°EBison Creek — 51.50°N, 116.20°WJones Ridge Limestone — 65.08°N, 141.10°WKlonowka Shale — 50.88°N, 20.95°EChopko — 68.92°N, 88.67°ELead Gulch — 36.95°N, 118.07°WSnowy Range — 45.87°N, 111.00°WHighgate — 44.48°N, 73.21°WPerekhod — 51.97°N, 85.97°EDunderberg — 39.40°N, 114.78°WHolm Dal — 82.42°N, 39.75°WUnit H — 49.67°N, 115.35°WFrederick Limestone — 39.41°N, 77.41°W

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The named rock units Homagnostus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 further formations hold fewer occurrences each and are not listed. 18 occurrences have no formation on record, which is common for older literature.

Homagnostus and its relatives

Cambrian

Where Homagnostus and its relatives were recorded in the Cambrian.

Found in the same rock

296 taxa

The Paleobiology Database records 75 sites for Homagnostus, 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

48 references

Each of the 189 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. 36 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 Homagnostus 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 Homagnostus, or no answer at all. This entry cannot say which.

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 itAgnostidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Howell 1935