Hecticoceras

Hecticoceras is an ammonite genus belonging to the haploceratoid family Oppeliidae, that lived during the Middle and Late Jurassic, from the Callovian. Hecticoceras may be seen as a series of some nine subgenera, beginning with the lower Callovian H. (Hecticoceras) and H. (Hecticoceratoides) and ending with the lower Oxfordian H. (Pseudobrightia) and H. (Eochetoceras). Hecticoceras sensu lato and Prohecticoceras from the underlying Bathonian form the oppeliid subfamily, Hecticoceratinae.

Hecticoceras

Ghedoghedo · CC BY-SA 4.0 · 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
HecticoceratinaePBDB
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 26 million years on record.

Every occurrence read is dated to somewhere between 168.2 Mya and 143.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Middle Jurassic — about 101 of 124 occurrencesMiddle JurassicLate Jurassic — about 23 of 124 occurrencesLate JurassicEarly Cretaceous — about 0 of 124 occurrences169–168 Mya — about 0.1 occurrences168–167 Mya — about 0.1 occurrences167–166 Mya — about 0.1 occurrences166–165 Mya — about 2 occurrences165–164 Mya — about 23 occurrences164–163 Mya — about 23 occurrences163–163 Mya — about 23 occurrences163–162 Mya — about 23 occurrences162–161 Mya — about 10 occurrences161–160 Mya — about 5 occurrences160–159 Mya — about 5 occurrences159–158 Mya — about 2 occurrences158–157 Mya — about 2 occurrences157–157 Mya — about 2 occurrences157–156 Mya — about 2 occurrences156–155 Mya — about 2 occurrences155–154 Mya — about 0.2 occurrences154–153 Mya — about 0.2 occurrences153–152 Mya — about 0.2 occurrences152–151 Mya — about 0.1 occurrences151–150 Mya — about 0.1 occurrences150–150 Mya — about 0.1 occurrences150–149 Mya — about 0.1 occurrences149–148 Mya — about 0.0 occurrences148–147 Mya — about 0.0 occurrences147–146 Mya — about 0.0 occurrences146–145 Mya — about 0.0 occurrences145–144 Mya — about 0.0 occurrences144–143 Mya — about 0.0 occurrences143–143 Mya — about 0.0 occurrences168.7 Mya142.6 Mya

124 occurrences of Hecticoceras on record, most of them in the Middle 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

124 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

15 formations

Habo beds — 23.20°N, 69.80°E"Sengenthal" — 49.23°N, 11.47°ELotena — 39.00°S, 70.00°WLotena — 37.00°S, 70.50°WLotena — 38.00°S, 71.00°WLotena — 37.45°S, 70.43°WLotena — 36.83°S, 71.00°WLotena — 36.00°S, 69.90°WLotena — 38.62°S, 70.17°W"Berching" — 49.23°N, 11.47°EGerpigem — 44.27°N, 40.17°EGerpigem — 44.08°N, 40.93°EGerpigem — 44.08°N, 40.95°ECroûte ferrugineuse — 46.65°N, 4.87°EChari — 23.50°N, 70.50°ELos Molles — 37.00°S, 70.50°WDalles à Bryozoaires — 47.32°N, 5.00°EQal'eh Dokhtar — 33.87°N, 57.30°ECalabozo — 35.18°S, 70.35°WBedford Canyon — 33.79°N, 117.60°WLa Manga — 36.21°S, 69.87°WCerritos Bayos — 22.56°S, 69.14°WGerpigem- Mezmayskaya — 44.13°N, 40.80°E

Loading coastlines…

The named rock units Hecticoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 59 occurrences have no formation on record, which is common for older literature.

Hecticoceras and its relatives

Middle Jurassic

Where Hecticoceras and its relatives were recorded in the Middle Jurassic.

Found in the same rock

445 taxa

The Paleobiology Database records 80 sites for Hecticoceras, 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

21 references

Each of the 124 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. 9 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 Hecticoceras

Credit
Ghedoghedo
Licence
CC BY-SA 4.0
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

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 itHecticoceratinae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Bonarelli 1893