Lonchodomas

Lonchodomas is a genus of trilobites, that lived during the Ordovician. It was eyeless, like all raphiophorids, and had a long straight sword-like frontal spine, that gradually transforms into the relatively long glabella. Both the glabellar spine and the backward directed genal spines are subquadrate in section. Lonchodomas has five thorax segments and the pleural area of the pygidium has two narrow furrows. Lonchodomas occurred in what are today Argentina, Canada (Newfoundland), Estonia, Latvia, Norway, Sweden, the Russian Federation and the United States.

Lonchodomas

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
RaphiophoridaePBDB
Diet
suspension feederPBDB, for Raphiophoridae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
blindPBDB, for Raphiophoridae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 26 million years on record.

The record covers at least 471.3 Mya to 445.2 Mya. No occurrence read is dated outside 486.85 Mya to 432.9 Mya.

Cambrian — about 0 of 365 occurrencesOrdovician — about 364 of 365 occurrencesOrdovicianSilurian — about 1 of 365 occurrencesSilurian488–486 Mya — about 0.0 occurrences486–484 Mya — about 0.0 occurrences484–482 Mya — about 0.0 occurrences482–480 Mya — about 0.0 occurrences480–479 Mya — about 0.0 occurrences479–477 Mya — about 0.6 occurrences477–475 Mya — about 3 occurrences475–473 Mya — about 3 occurrences473–471 Mya — about 7 occurrences471–469 Mya — about 38 occurrences469–467 Mya — about 16 occurrences467–465 Mya — about 14 occurrences465–464 Mya — about 12 occurrences464–462 Mya — about 10 occurrences462–460 Mya — about 21 occurrences460–458 Mya — about 30 occurrences458–456 Mya — about 31 occurrences456–454 Mya — about 24 occurrences454–452 Mya — about 31 occurrences452–451 Mya — about 36 occurrences451–449 Mya — about 34 occurrences449–447 Mya — about 26 occurrences447–445 Mya — about 23 occurrences445–443 Mya — about 6 occurrences443–441 Mya — about 0.1 occurrences441–439 Mya — about 0.1 occurrences439–437 Mya — about 0.1 occurrences437–436 Mya — about 0.1 occurrences436–434 Mya — about 0.1 occurrences434–432 Mya — about 0.0 occurrences471.3 Mya445.2 Mya488 Mya432 Mya

365 occurrences of Lonchodomas 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

365 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

116 formations

Volkhov — 59.97°N, 32.57°ESolvang — 60.00°N, 11.00°ESolvang — 60.13°N, 10.28°ESolvang — 59.88°N, 10.72°ESolvang — 61.33°N, 8.80°ESolvang — 59.90°N, 10.63°ESolvang — 59.82°N, 10.61°ESolvang — 58.45°N, 8.76°ESolvang — 59.85°N, 10.53°ESolvang — 59.86°N, 10.52°ESolvang — 60.05°N, 10.18°ETable Cove — 50.36°N, 57.54°WTable Cove — 50.18°N, 57.62°WCrown Point — 44.61°N, 73.42°WCrown Point — 44.71°N, 73.46°WCrown Point — 44.58°N, 73.53°WCrown Point — 44.88°N, 73.44°WDalby — 57.00°N, 17.00°EDalby — 61.00°N, 15.00°EDalby — 58.00°N, 14.00°EDalby — 58.00°N, 12.00°EDalby — 55.53°N, 14.23°EDufton Shales — 54.72°N, 2.48°WBugryshikha — 51.28°N, 82.79°EDay Point — 44.61°N, 73.42°WDay Point — 44.65°N, 73.45°WValcour — 44.61°N, 73.42°WBalclatchie — 55.22°N, 4.85°WBalclatchie — 54.84°N, 4.05°WBalclatchie — 55.31°N, 4.80°WDaduhe — 27.57°N, 104.92°ELynna — 59.97°N, 32.57°EHusbergøya — 59.87°N, 10.72°EHusbergøya — 59.85°N, 10.50°EHusbergøya — 59.86°N, 10.56°EFuruberget — 60.37°N, 10.42°EFuruberget — 60.34°N, 10.42°EFuruberget — 60.34°N, 10.51°ESuri — 29.00°S, 68.00°WSuri — 28.66°S, 68.84°WSuri — 28.67°S, 67.73°WSuri — 28.00°S, 67.00°WNakkholmen — 61.33°N, 8.80°ENakkholmen — 59.90°N, 10.63°ENakkholmen — 59.84°N, 10.54°ETekhten — 50.99°N, 85.09°ETekhten — 50.97°N, 85.05°ETekhten — 51.23°N, 84.74°ENakholmen — 60.00°N, 11.00°ENakholmen — 59.88°N, 10.54°ENakholmen — 59.89°N, 10.70°EMiaopo — 33.00°N, 111.00°EMiaopo — 32.00°N, 108.00°EMiaopo — 32.00°N, 118.00°ETangtou — 32.00°N, 118.00°ETangtou — 32.00°N, 119.00°ETangtou — 32.07°N, 119.26°EWhite Head — 48.47°N, 64.32°WWhite Head — 48.58°N, 68.18°WWhite Head — 48.50°N, 64.23°WEdinburg — 38.99°N, 78.35°WEdinburg — 38.99°N, 78.36°WEdinburg — 38.84°N, 78.55°WJerrestad — 55.99°N, 13.30°EKarasa — 52.22°N, 87.01°EKarasa — 52.02°N, 87.12°E

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The named rock units Lonchodomas has been recovered from, largest first. Drawn where the rock is now, not where it formed. 92 further formations hold fewer occurrences each and are not listed. 33 occurrences have no formation on record, which is common for older literature.

Lonchodomas and its relatives

Ordovician

Where Lonchodomas and its relatives were recorded in the Ordovician.

Found in the same rock

1,218 taxa

The Paleobiology Database records 347 sites for Lonchodomas, and this reads 240 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

106 references

Each of the 365 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. 94 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 content2

Picture of Lonchodomas

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

3D model

Source
Sketchfab
Licence
Free Standard
Commercial use
cannot be read from the licence given — check the record

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 itRaphiophoridae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Angelin 1854