Bumastus

Bumastus is an extinct genus of corynexochid trilobites which existed from the Early Ordovician period to the Late Silurian period. They were relatively large trilobites, reaching a length of 6 in (15 cm). They were distinctive for their highly globular, smooth-surfaced exoskeleton. They possessed well-developed, large compound eyes and were believed to have dwelled in shallow-water sediments in life.

Bumastus

Obsidian Soul · CC BY 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
StyginidaePBDB
Diet
carnivorePBDB, for Corynexochida
Life habit
nektobenthicPBDB, for Corynexochida
Motility
actively mobilePBDB, for Corynexochida
Vision
well-developedPBDB, for Styginidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 54 million years on record.

The record covers at least 477.1 Mya to 422.7 Mya. No occurrence read is dated outside 486.85 Mya to 419.62 Mya.

Cambrian — about 0 of 226 occurrencesOrdovician — about 83 of 226 occurrencesOrdovicianSilurian — about 143 of 226 occurrencesSilurianDevonian — about 0 of 226 occurrences488–486 Mya — about 0.1 occurrences486–484 Mya — about 0.6 occurrences484–481 Mya — about 0.6 occurrences481–479 Mya — about 0.6 occurrences479–477 Mya — about 0.4 occurrences477–474 Mya — about 0.1 occurrences474–472 Mya — about 0.1 occurrences472–470 Mya — about 2 occurrences470–467 Mya — about 2 occurrences467–465 Mya — about 2 occurrences465–463 Mya — about 2 occurrences463–460 Mya — about 4 occurrences460–458 Mya — about 5 occurrences458–456 Mya — about 10 occurrences456–453 Mya — about 11 occurrences453–451 Mya — about 13 occurrences451–449 Mya — about 16 occurrences449–446 Mya — about 9 occurrences446–444 Mya — about 5 occurrences444–442 Mya — about 6 occurrences442–439 Mya — about 10 occurrences439–437 Mya — about 8 occurrences437–435 Mya — about 7 occurrences435–432 Mya — about 15 occurrences432–430 Mya — about 32 occurrences430–428 Mya — about 24 occurrences428–425 Mya — about 21 occurrences425–423 Mya — about 18 occurrences423–421 Mya — about 2 occurrences421–418 Mya — about 0.3 occurrences477.1 Mya422.7 Mya488 Mya418 Mya

226 occurrences of Bumastus on record, most of them in the Silurian. 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

226 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

95 formations

Racine Dolomite — 41.67°N, 88.00°WRacine Dolomite — 43.00°N, 88.00°WRacine Dolomite — 38.97°N, 90.43°WRacine Dolomite — 41.12°N, 88.02°WRacine Dolomite — 42.72°N, 87.78°WRacine Dolomite — 41.57°N, 87.60°WRacine — 43.05°N, 88.01°WRacine — 42.73°N, 87.78°WRacine — 42.88°N, 88.04°WRacine — 43.01°N, 88.38°WRacine — 41.85°N, 87.65°WFukata — 33.53°N, 133.22°ERochester Shale — 43.15°N, 77.62°WRochester Shale — 43.15°N, 77.06°WRochester Shale — 43.10°N, 79.06°WRochester Shale — 43.00°N, 79.00°WRochester Shale — 43.17°N, 78.68°WRochester Shale — 43.15°N, 77.72°WBenbolt — 35.91°N, 84.09°WBenbolt — 37.10°N, 81.34°WBenbolt — 37.22°N, 81.36°WBenbolt — 37.23°N, 81.10°WBenbolt — 37.00°N, 81.00°WBenbolt — 37.23°N, 81.32°WBenbolt — 37.08°N, 81.71°WBenbolt — 36.19°N, 83.93°WMotol — 50.00°N, 17.78°EMotol — 50.05°N, 14.37°EMotol — 49.97°N, 14.07°EMotol — 49.77°N, 13.25°EMotol — 50.08°N, 14.47°ERochester — 43.16°N, 79.05°WRochester — 43.18°N, 78.72°WRochester — 43.19°N, 77.56°WRochester — 43.23°N, 77.21°WRochester — 43.22°N, 77.02°WScotch Grove — 41.90°N, 90.60°WScotch Grove — 42.00°N, 91.00°WScotch Grove — 42.00°N, 90.50°WScotch Grove — 41.85°N, 90.18°WDolbor — 63.00°N, 95.00°EDolbor — 62.14°N, 91.56°EDolbor — 62.14°N, 91.49°EDolbor — 62.15°N, 91.43°ECopenhagen — 39.98°N, 116.27°WCape Schuchert — 77.51°N, 66.65°WCape Schuchert — 81.00°N, 65.00°WKopanina — 49.95°N, 12.93°EKopanina — 50.20°N, 12.48°ERestevo Subsuite — 48.58°N, 26.92°EBobcaygeon — 44.53°N, 78.55°WBobcaygeon — 44.58°N, 79.09°WCystoid Limestone — 41.15°N, 1.18°WCystoid Limestone — 41.17°N, 1.15°WIrene Bay — 74.98°N, 95.88°WMangazea — 62.14°N, 91.56°EMangazea — 62.17°N, 91.42°EKhaastyrka — 67.32°N, 103.85°EKhaastyrka — 67.33°N, 104.85°EKhaastyrka — 67.34°N, 103.88°EKings Falls — 43.21°N, 75.46°WKraluv Dvur — 50.00°N, 14.00°EKraluv Dvur — 50.04°N, 14.41°EWabash — 40.42°N, 85.80°WSlite Beds — 57.72°N, 18.80°EHemse Beds — 57.28°N, 18.32°EHemse Beds — 57.37°N, 18.69°EZelkovice — 50.00°N, 14.05°E

Loading coastlines…

The named rock units Bumastus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 71 further formations hold fewer occurrences each and are not listed. 19 occurrences have no formation on record, which is common for older literature.

Bumastus and its relatives

Silurian

Where Bumastus and its relatives were recorded in the Silurian.

Found in the same rock

2,377 taxa

The Paleobiology Database records 188 sites for Bumastus, 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

82 references

Each of the 226 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. 70 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 Bumastus

Credit
Obsidian Soul
Licence
CC BY 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-NoDerivs
Commercial use
the licence does not allow it

Smithsonian Open Access 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 itStyginidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Murchison 1839)