Blackwelderia

Searched as Blackwelderia repanda. The Paleobiology Database treats Blackwelderia as the accepted name.

Blackwelderia

via iDigBio · via iDigBio. 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
DamesellidaePBDB
Diet
carnivorePBDB, for Lichida
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Damesellidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 2.5 million years on record.

Every occurrence read is dated to somewhere between 499.5 Mya and 497 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 8 of 8 occurrencesCambrian500–499 Mya — about 0.1 occurrences499–499 Mya — about 0.1 occurrences499–499 Mya — about 0.1 occurrences499–499 Mya — about 0.1 occurrences499–499 Mya — about 0.3 occurrences499–499 Mya — about 0.4 occurrences499–499 Mya — about 0.4 occurrences499–499 Mya — about 0.4 occurrences499–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–498 Mya — about 0.4 occurrences498–497 Mya — about 0.4 occurrences497–497 Mya — about 0.4 occurrences497–497 Mya — about 0.4 occurrences497–497 Mya — about 0.4 occurrences497–497 Mya — about 0.3 occurrences500 Mya496.5 Mya

8 occurrences of Blackwelderia 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

8 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

3 formations

Goyder — 23.61°S, 134.49°EZhumabai — 43.53°N, 69.95°EShannon — 23.61°S, 134.48°E

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

Blackwelderia and its relatives

Cambrian

Where Blackwelderia and its relatives were recorded in the Cambrian.

Found in the same rock

56 taxa

The Paleobiology Database records 11 sites for Blackwelderia, 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

2 references

Each of the 8 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. 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 Blackwelderia

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itDamesellidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Walcott 1906