Rasenia

Rasenia is an extinct ammonoid cephalopod genus belonging to the superfamily Perisphinctoidea. These fast-moving nektonic carnivores lived during the Upper Jurassic period, in the Kimmeridgian and Tithonian ages.

Rasenia

Hectonichus · 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
AulacostephaninaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 13 million years on record.

Every occurrence read is dated to somewhere between 161.5 Mya and 149.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Middle Jurassic — about 0 of 61 occurrencesLate Jurassic — about 61 of 61 occurrencesLate Jurassic162–161 Mya — about 0.0 occurrences161–161 Mya — about 0.0 occurrences161–160 Mya — about 0.0 occurrences160–160 Mya — about 0.0 occurrences160–159 Mya — about 0.0 occurrences159–159 Mya — about 0.0 occurrences159–158 Mya — about 0.0 occurrences158–158 Mya — about 0.0 occurrences158–158 Mya — about 0.0 occurrences158–157 Mya — about 0.0 occurrences157–157 Mya — about 0.0 occurrences157–156 Mya — about 0.0 occurrences156–156 Mya — about 0.0 occurrences156–155 Mya — about 0.0 occurrences155–155 Mya — about 0.0 occurrences155–154 Mya — about 8 occurrences154–154 Mya — about 10 occurrences154–154 Mya — about 10 occurrences154–153 Mya — about 10 occurrences153–153 Mya — about 10 occurrences153–152 Mya — about 10 occurrences152–152 Mya — about 1 occurrence152–151 Mya — about 0.3 occurrences151–151 Mya — about 0.3 occurrences151–150 Mya — about 0.3 occurrences150–150 Mya — about 0.3 occurrences150–150 Mya — about 0.3 occurrences150–149 Mya — about 0.2 occurrences162 Mya148.7 Mya

61 occurrences of Rasenia on record, most of them in the Late Jurassic. 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

61 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

Dietfurt — 49.95°N, 11.08°EReuchenette — 47.40°N, 7.03°EJanusfjellet — 78.06°N, 18.69°E

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The named rock units Rasenia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 54 occurrences have no formation on record, which is common for older literature.

Rasenia and its relatives

Late Jurassic

Where Rasenia and its relatives were recorded in the Late Jurassic.

Found in the same rock

82 taxa

The Paleobiology Database records 25 sites for Rasenia, 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

10 references

Each of the 61 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 content2

Picture of Rasenia

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

3D model

Source
Sketchfab
Licence
CC Attribution
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 itAulacostephaninae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Salfeld 1913