Holcophylloceras zignodianum

Holcophylloceras zignodianum

via iDigBio · CC BY · 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
HolcophyllocerasPBDB
Diet
carnivorePBDB, for Phylloceratida
Life habit
nektonicPBDB, for Phylloceratida
Motility
actively mobilePBDB, for Phylloceratida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 19 million years on record.

The record covers at least 168.2 Mya to 149.2 Mya. No occurrence read is dated outside 170.9 Mya to 143.1 Mya.

Middle Jurassic — about 11 of 16 occurrencesMiddle JurassicLate Jurassic — about 5 of 16 occurrencesLate JurassicEarly Cretaceous — about 0 of 16 occurrences171–170 Mya — about 0.2 occurrences170–170 Mya — about 0.4 occurrences170–169 Mya — about 0.7 occurrences169–168 Mya — about 4 occurrences168–167 Mya — about 1 occurrence167–166 Mya — about 1 occurrence166–165 Mya — about 0.8 occurrences165–164 Mya — about 0.7 occurrences164–163 Mya — about 0.7 occurrences163–162 Mya — about 0.7 occurrences162–161 Mya — about 1 occurrence161–160 Mya — about 1 occurrence160–159 Mya — about 1 occurrence159–158 Mya — about 0.1 occurrences158–157 Mya — about 0.1 occurrences157–156 Mya — about 0.1 occurrences156–155 Mya — about 0.1 occurrences155–154 Mya — about 0.0 occurrences149–148 Mya — about 0.1 occurrences148–147 Mya — about 0.2 occurrences147–146 Mya — about 0.2 occurrences146–145 Mya — about 0.2 occurrences145–144 Mya — about 0.2 occurrences144–144 Mya — about 0.2 occurrences144–143 Mya — about 0.1 occurrences168.2 Mya149.2 Mya171.5 Mya142.5 Mya

16 occurrences of Holcophylloceras zignodianum 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

16 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

Dalichai — 36.59°N, 58.69°EDalichai — 36.56°N, 59.30°EDalichai — 36.50°N, 58.95°EDalichai — 37.20°N, 57.18°EDalichai — 37.38°N, 56.69°EDjangura — 43.90°N, 41.56°EDjangura — 43.90°N, 41.45°EKambe — 4.02°S, 39.55°EGuasasa — 22.67°N, 83.55°WPálihálás Limestone — 47.72°N, 18.51°E

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The named rock units Holcophylloceras zignodianum has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.

Holcophylloceras zignodianum and its relatives

Middle Jurassic

Where Holcophylloceras zignodianum and its relatives were recorded in the Middle Jurassic.

Found in the same rock

154 taxa

The Paleobiology Database records 16 sites for Holcophylloceras zignodianum, 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 16 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 content1

Picture of Holcophylloceras zignodianum

Source
iDigBio
Credit
via iDigBio
Licence
CC BY
Commercial use
the licence allows it

No 3D scan of Holcophylloceras zignodianum was found in MorphoSource and Sketchfab.

Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itHolcophylloceras through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (d'Orbigny 1848)