Hamulina

Hamulina is an extinct ammonoid cephalopod genus belonging to the family Hamulinidae. These cephalopod were fast-moving nektonic carnivores. They lived during the Cretaceous period, Barremian age. The type species is Hamulina astieriana.

Hamulina

H. Zell · 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
HamulinidaePBDB
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 least 32 million years on record.

The record covers at least 132.6 Mya to 100.5 Mya. No occurrence read is dated outside 143.1 Mya to 93.9 Mya.

Late Jurassic — about 0 of 20 occurrencesEarly Cretaceous — about 19 of 20 occurrencesEarly CretaceousLate Cretaceous — about 1 of 20 occurrencesLate Cretaceous144–142 Mya — about 0.1 occurrences142–141 Mya — about 0.2 occurrences141–139 Mya — about 0.2 occurrences139–137 Mya — about 0.2 occurrences137–136 Mya — about 0.2 occurrences136–134 Mya — about 0.2 occurrences134–132 Mya — about 0.3 occurrences132–130 Mya — about 0.5 occurrences130–129 Mya — about 0.5 occurrences129–127 Mya — about 0.5 occurrences127–125 Mya — about 2 occurrences125–124 Mya — about 5 occurrences124–122 Mya — about 5 occurrences122–120 Mya — about 2 occurrences120–119 Mya — about 0.3 occurrences119–117 Mya — about 0.5 occurrences117–115 Mya — about 0.5 occurrences115–113 Mya — about 0.5 occurrences113–112 Mya — about 0.5 occurrences112–110 Mya — about 0.5 occurrences101–100 Mya — about 0.1 occurrences100–98 Mya — about 0.3 occurrences98–96 Mya — about 0.3 occurrences96–95 Mya — about 0.3 occurrences95–93 Mya — about 0.1 occurrences132.6 Mya100.5 Mya144 Mya93 Mya

20 occurrences of Hamulina on record, most of them in the Early 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

20 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

5 formations

San Lucas — 18.60°N, 100.82°WSan Lucas — 18.53°N, 100.77°WLabatlan Sandstone — 47.75°N, 18.50°EBudden Canyon — 40.45°N, 122.62°WMaiolica — 45.75°N, 9.48°EClansayes — 27.20°N, 100.55°W

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The named rock units Hamulina has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 occurrences have no formation on record, which is common for older literature.

Hamulina and its relatives

Early Cretaceous

Where Hamulina and its relatives were recorded in the Early Cretaceous.

Found in the same rock

143 taxa

The Paleobiology Database records 19 sites for Hamulina, 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

11 references

Each of the 20 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 Hamulina

Credit
H. Zell
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
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 itHamulinidae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. d'Orbigny 1850