Blanfordiceras

Blanfordiceras is a strongly ribbed, evolute ammonite included in the perisphinctacean family, Neocomitidae that lived during the latest Jurassic. The shell of Blanfordiceras is discoidal, with evolute coiling and all whorls visible so as to have a broad umbilicus. Exposed whorls are ornamented with strong ribbing that arises from the umbilicus, bifurcating on the outer flanks and extending onto the venter. In general form Blanfordiceras is similar to Berriasella, although with a more rounded whorl section.

Blanfordiceras

via iDigBio · CC BY-NC-ND · 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
BerriasellinaePBDB
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 6.1 million years on record.

The record covers at least 149.2 Mya to 143.1 Mya. No occurrence read is dated outside 161.5 Mya to 137.05 Mya.

Middle Jurassic — about 0 of 24 occurrencesLate Jurassic — about 21 of 24 occurrencesLate JurassicEarly Cretaceous — about 3 of 24 occurrencesEarly Cretaceous162–161 Mya — about 0.0 occurrences161–160 Mya — about 0.0 occurrences160–159 Mya — about 0.0 occurrences159–159 Mya — about 0.0 occurrences159–158 Mya — about 0.0 occurrences158–157 Mya — about 0.0 occurrences157–156 Mya — about 0.0 occurrences156–155 Mya — about 0.0 occurrences155–154 Mya — about 0.1 occurrences154–154 Mya — about 0.2 occurrences154–153 Mya — about 0.2 occurrences153–152 Mya — about 0.2 occurrences152–151 Mya — about 0.2 occurrences151–150 Mya — about 0.2 occurrences150–149 Mya — about 0.2 occurrences149–148 Mya — about 0.4 occurrences148–148 Mya — about 0.5 occurrences148–147 Mya — about 0.5 occurrences147–146 Mya — about 0.5 occurrences146–145 Mya — about 0.7 occurrences145–144 Mya — about 7 occurrences144–143 Mya — about 7 occurrences143–142 Mya — about 2 occurrences142–142 Mya — about 0.4 occurrences142–141 Mya — about 0.4 occurrences141–140 Mya — about 0.4 occurrences140–139 Mya — about 0.4 occurrences139–138 Mya — about 0.4 occurrences138–137 Mya — about 0.4 occurrences137–137 Mya — about 0.2 occurrences149.2 Mya143.1 Mya162 Mya136.6 Mya

24 occurrences of Blanfordiceras 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

24 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

6 formations

Spiti Shale — 32.28°N, 78.02°ESpiti Shale — 32.42°N, 78.08°EAnchorage — 62.60°S, 61.17°WGuchuochun — 28.08°N, 86.00°ELatady — 76.13°S, 69.67°WChia Gara — 37.01°N, 43.40°EVaca Muerta — 38.59°S, 70.13°W

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The named rock units Blanfordiceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Blanfordiceras and its relatives

Late Jurassic

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

Found in the same rock

62 taxa

The Paleobiology Database records 9 sites for Blanfordiceras, 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 24 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 Blanfordiceras

Source
iDigBio
Credit
via iDigBio
Licence
CC BY-NC-ND
Commercial use
the licence does not allow it

No 3D scan of Blanfordiceras was found in Sketchfab.

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 itBerriasellinae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.