Belemnitella bulbosa

Belemnitella bulbosa is a species of belemnite from the Late Cretaceous of North America. It is known only from two localities - the Pierre Shale and Fox Hills Formations. B. bulbosa had a slender somewhat cylindrical rostrum (guard) with a slightly expanded front opening. Like other members of the genus Belemnitella, it had a dorsal ridge on the rostrum. The phragmocone is about the same size or slightly longer than the rostrum and has an oval cross-section.

Belemnitella bulbosa

via iDigBio · CC0 · 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
BelemnitellaPBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektonicPBDB, for Belemnitida
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 6.2 million years on record.

Every occurrence read is dated to somewhere between 72.2 Mya and 66 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 4 of 4 occurrencesLate CretaceousPaleocene — about 0 of 4 occurrences72–72 Mya — about 0.1 occurrences72–72 Mya — about 0.2 occurrences72–72 Mya — about 0.2 occurrences72–71 Mya — about 0.2 occurrences71–71 Mya — about 0.2 occurrences71–71 Mya — about 0.2 occurrences71–71 Mya — about 0.2 occurrences71–70 Mya — about 0.2 occurrences70–70 Mya — about 0.2 occurrences70–70 Mya — about 0.2 occurrences70–70 Mya — about 0.2 occurrences70–69 Mya — about 0.2 occurrences69–69 Mya — about 0.2 occurrences69–69 Mya — about 0.2 occurrences69–69 Mya — about 0.2 occurrences69–68 Mya — about 0.2 occurrences68–68 Mya — about 0.2 occurrences68–68 Mya — about 0.2 occurrences68–68 Mya — about 0.2 occurrences68–67 Mya — about 0.2 occurrences67–67 Mya — about 0.2 occurrences67–67 Mya — about 0.2 occurrences67–67 Mya — about 0.2 occurrences67–66 Mya — about 0.2 occurrences66–66 Mya — about 0.2 occurrences66–66 Mya — about 0.1 occurrences72.7 Mya65.5 Mya

4 occurrences of Belemnitella bulbosa on record, most of them in the Late Cretaceous. 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

4 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

2 formations

Pierre Shale — 45.75°N, 101.13°WPierre Shale — 45.52°N, 100.47°WFox Hills — 45.14°N, 100.88°W

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

Belemnitella bulbosa and its relatives

Late Cretaceous

Where Belemnitella bulbosa and its relatives were recorded in the Late Cretaceous.

Found in the same rock

80 taxa

The Paleobiology Database records 4 sites for Belemnitella bulbosa, 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 4 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Belemnitella bulbosa

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Belemnitella bulbosa was found in Sketchfab.

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 itBelemnitella through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Meek and Hayden 1856