Bolbolenellus

Bolbolenellus is an extinct genus of trilobites, fossil marine arthropods, with five species attributed to it currently. It can be easily distinguished from all other trilobites by the combination of the absence of dorsal sutures in the head shield like all Olenellina, and a distinctly bulbous frontal lobe (L4) of the raised axial area in the head called glabella. The species lived at the end of the Lower Cambrian.

Bolbolenellus

Lieberman, Bruce S.; Gunther Family; Meyer, Robert; Whiteley, Thomas; Whiteley, B; Reboul, Roland; Gronau, Christian;… · CC BY 4.0 · via GBIF. 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
BiceratopsidaePBDB
Diet
deposit feederPBDB, for Redlichiida
Life habit
low-level epifaunalPBDB, for Redlichiida
Motility
fast-movingPBDB, for Redlichiida
Environment
marinePBDB, for Trilobita

Time the record covers

At most 33 million years on record.

Every occurrence read is dated to somewhere between 538.8 Mya and 506.5 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 22 of 22 occurrencesCambrian539–538 Mya — about 0.0 occurrences538–537 Mya — about 0.0 occurrences537–536 Mya — about 0.0 occurrences536–535 Mya — about 0.0 occurrences535–534 Mya — about 0.0 occurrences534–533 Mya — about 0.0 occurrences533–532 Mya — about 0.0 occurrences532–530 Mya — about 0.0 occurrences530–529 Mya — about 0.0 occurrences529–528 Mya — about 0.0 occurrences528–527 Mya — about 0.0 occurrences527–526 Mya — about 0.0 occurrences526–525 Mya — about 0.0 occurrences525–524 Mya — about 0.0 occurrences524–523 Mya — about 0.0 occurrences523–522 Mya — about 0.0 occurrences522–520 Mya — about 0.0 occurrences520–519 Mya — about 0.0 occurrences519–518 Mya — about 0.0 occurrences518–517 Mya — about 0.0 occurrences517–516 Mya — about 0.0 occurrences516–515 Mya — about 2 occurrences515–514 Mya — about 4 occurrences514–513 Mya — about 4 occurrences513–511 Mya — about 4 occurrences511–510 Mya — about 4 occurrences510–509 Mya — about 2 occurrences509–508 Mya — about 0.2 occurrences508–507 Mya — about 0.0 occurrences507–506 Mya — about 0.0 occurrences539.4 Mya505.9 Mya

22 occurrences of Bolbolenellus 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

22 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

7 formations

Pioche Shale — 37.77°N, 114.56°WPioche Shale — 37.61°N, 114.76°WPioche Shale — 37.53°N, 114.73°WCarrara — 35.85°N, 116.23°WCarrara — 36.20°N, 116.35°WPioche — 37.80°N, 114.57°WEmigrant — 37.72°N, 117.44°WEmigrant — 37.71°N, 117.45°WSekwi — 63.52°N, 128.68°WSekwi — 63.58°N, 129.20°WIlltyd — 65.09°N, 134.71°WMount Clark — 64.94°N, 127.26°WMount Clark — 64.48°N, 126.79°W

Loading coastlines…

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

Bolbolenellus and its relatives

Cambrian

Where Bolbolenellus and its relatives were recorded in the Cambrian.

Found in the same rock

34 taxa

The Paleobiology Database records 18 sites for Bolbolenellus, 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

13 references

Each of the 22 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. 1 further reference is 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 Bolbolenellus

Source
GBIF
Credit
Lieberman, Bruce S.; Gunther Family; Meyer, Robert; Whiteley, Thomas; Whiteley, B; Reboul, Roland; Gronau, Christian;…
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Bolbolenellus was found in MorphoSource and Sketchfab.

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 itBiceratopsidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Palmer and Repina 1993