Harpoceras

Harpoceras is an extinct genus of ammonite belonging to the family Hildoceratidae. These cephalopods existed in the Jurassic period, during the Toarcian age from the Falciferum zone to the Commune subzone of the Bifrons zone. They were fast-moving nektonic carnivores.

Harpoceras

Lysippos · 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
HarpoceratinaePBDB
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 29 million years on record.

The record covers at least 184.2 Mya to 154.8 Mya. No occurrence read is dated outside 201.4 Mya to 143.1 Mya.

Late Triassic — about 0 of 448 occurrencesEarly Jurassic — about 443 of 448 occurrencesEarly JurassicMiddle Jurassic — about 2 of 448 occurrencesMiddle JurassicLate Jurassic — about 3 of 448 occurrencesLate JurassicEarly Cretaceous — about 0 of 448 occurrences203–201 Mya — about 0.1 occurrences201–199 Mya — about 0.2 occurrences199–197 Mya — about 0.3 occurrences197–194 Mya — about 0.3 occurrences194–192 Mya — about 1 occurrence192–190 Mya — about 4 occurrences190–188 Mya — about 4 occurrences188–186 Mya — about 5 occurrences186–184 Mya — about 5 occurrences184–182 Mya — about 273 occurrences182–180 Mya — about 52 occurrences180–178 Mya — about 37 occurrences178–176 Mya — about 34 occurrences176–174 Mya — about 27 occurrences174–172 Mya — about 0.3 occurrences172–170 Mya — about 0.3 occurrences170–168 Mya — about 0.2 occurrences168–166 Mya — about 0.2 occurrences166–164 Mya — about 0.2 occurrences164–162 Mya — about 0.2 occurrences162–160 Mya — about 0.1 occurrences160–158 Mya — about 0.1 occurrences158–156 Mya — about 0.1 occurrences156–154 Mya — about 0.7 occurrences154–152 Mya — about 2 occurrences152–150 Mya — about 0.1 occurrences150–148 Mya — about 0.1 occurrences148–146 Mya — about 0.1 occurrences146–144 Mya — about 0.1 occurrences144–142 Mya — about 0.0 occurrences184.2 Mya154.8 Mya203 Mya142 Mya

448 occurrences of Harpoceras on record, most of them in the Early 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

448 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

38 formations

Nishinakayama — 34.25°N, 131.00°EBugarone — 43.33°N, 13.22°ECamino — 43.05°N, 4.07°WKisgerecse — 47.70°N, 18.43°EKisgerecse — 47.66°N, 18.47°EJet Rock — 54.54°N, 0.76°WJet Rock — 54.46°N, 0.54°WJet Rock — 54.54°N, 0.75°WJet Rock — 54.48°N, 0.58°WJet Rock — 54.40°N, 0.49°WKisgerecse Marl — 47.70°N, 18.49°EWhiteaves — 53.42°N, 132.26°WWhiteaves — 53.20°N, 132.05°WLautaro — 27.66°S, 69.97°WLautaro — 28.20°S, 70.00°WLautaro — 28.14°S, 69.97°WLautaro — 28.21°S, 69.94°WLautaro — 27.99°S, 69.71°WLautaro — 27.70°S, 69.61°WLautaro — 27.89°S, 69.84°WAgoudim — 31.95°N, 5.04°WMarnes de Fontaneilles — 43.85°N, 3.12°ECastillo Pedroso — 43.15°N, 4.37°WSchistes Cartons — 43.85°N, 3.12°EChâabet El Attaris — 35.10°N, 9.71°ECastillo Pedros — 42.89°N, 3.98°WMaude — 53.32°N, 132.48°WMaude — 53.18°N, 132.03°WPosidonienschiefer — 48.23°N, 8.79°EPosidonienschiefer — 49.35°N, 11.36°EOzirovo — 41.89°N, 24.58°EOzirovo — 42.86°N, 26.42°EOzirovo — 42.94°N, 24.41°EStaa — 35.11°N, 9.68°EStaa — 36.35°N, 10.07°EAmergou — 34.50°N, 5.13°WAgardhfjellet — 78.29°N, 18.84°EAgardhfjellet — 78.05°N, 18.64°EAdnet — 47.46°N, 13.56°EAdnet — 48.89°N, 19.08°ESierra Fraga — 26.99°S, 69.59°WSierra Fraga — 26.91°S, 69.57°WEl Cholo — 32.28°S, 70.03°W

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The named rock units Harpoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 further formations hold fewer occurrences each and are not listed. 167 occurrences have no formation on record, which is common for older literature.

Harpoceras and its relatives

Early Jurassic

Where Harpoceras and its relatives were recorded in the Early Jurassic.

Found in the same rock

235 taxa

The Paleobiology Database records 329 sites for Harpoceras, and this reads 240 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

64 references

Each of the 448 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. 52 further references are 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 content2

Picture of Harpoceras

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

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial
Commercial use
the licence does not allow it

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 itHarpoceratinae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.