Lachnostoma

Lachnostoma is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago. It is also closely related to mint.

A picture published with the record for Lachnostoma. What it shows has not been checked.

Smithsonian Institution · CC0 · via Smithsonian. 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
AsaphidaePBDB
Diet
carnivorePBDB, for Trilobita
Life habit
low-level epifaunalPBDB, for Asaphida
Motility
fast-movingPBDB, for Asaphida
Vision
well-developedPBDB, for Asaphidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 5.8 million years on record.

The record covers at least 477.1 Mya to 471.3 Mya. No occurrence read is dated outside 488.9 Mya to 468 Mya.

Cambrian — about 0 of 62 occurrencesCambrianOrdovician — about 62 of 62 occurrencesOrdovician489–489 Mya — about 0.0 occurrences489–488 Mya — about 0.0 occurrences488–487 Mya — about 0.0 occurrences487–486 Mya — about 0.1 occurrences486–486 Mya — about 2 occurrences486–485 Mya — about 2 occurrences485–484 Mya — about 2 occurrences484–484 Mya — about 2 occurrences484–483 Mya — about 2 occurrences483–482 Mya — about 2 occurrences482–481 Mya — about 2 occurrences481–481 Mya — about 2 occurrences481–480 Mya — about 2 occurrences480–479 Mya — about 2 occurrences479–478 Mya — about 2 occurrences478–478 Mya — about 2 occurrences478–477 Mya — about 2 occurrences477–476 Mya — about 0.6 occurrences476–476 Mya — about 0.6 occurrences476–475 Mya — about 4 occurrences475–474 Mya — about 6 occurrences474–473 Mya — about 6 occurrences473–473 Mya — about 6 occurrences473–472 Mya — about 6 occurrences472–471 Mya — about 5 occurrences471–470 Mya — about 0.9 occurrences470–470 Mya — about 0.8 occurrences470–469 Mya — about 0.6 occurrences469–468 Mya — about 0.4 occurrences468–468 Mya — about 0.1 occurrences477.1 Mya471.3 Mya489.4 Mya467.5 Mya

62 occurrences of Lachnostoma on record, most of them in the Ordovician. 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

62 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

12 formations

Outram — 52.88°N, 118.08°WOutram — 50.68°N, 116.04°WWah Wah — 38.85°N, 113.46°WNinemile — 39.20°N, 116.44°WNinemile — 37.00°N, 116.00°WNinemile — 37.34°N, 115.38°WNinemile — 36.79°N, 117.54°WNinemile — 38.28°N, 116.42°WGarden City — 40.16°N, 110.40°WGarden City — 41.92°N, 112.15°WGarden City — 41.52°N, 111.94°WGarden City — 41.74°N, 111.83°WWahwah Limestone — 39.89°N, 113.37°WWahwah Limestone — 38.84°N, 113.46°WWahwah Limestone — 38.69°N, 112.60°WWahwah Limestone — 39.17°N, 112.17°WWahwah — 38.85°N, 113.46°WWahwah — 38.86°N, 113.46°WValhallfonna — 79.80°N, 17.76°EAntelope Valley — 37.12°N, 116.50°WKanosh Shale — 38.69°N, 112.60°WNinemile/Lower Antelope Valley — 37.12°N, 116.50°WKirtonryggen — 79.85°N, 17.67°EAl Rose — 36.96°N, 118.09°W

Loading coastlines…

The named rock units Lachnostoma has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Lachnostoma and its relatives

Ordovician

Where Lachnostoma and its relatives were recorded in the Ordovician.

Found in the same rock

125 taxa

The Paleobiology Database records 61 sites for Lachnostoma, 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

14 references

Each of the 62 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. 2 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 Lachnostoma

Source
Smithsonian
Credit
Smithsonian Institution
Licence
CC0 — this site’s default, not the record’s
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 itAsaphidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ross 1951