Berriasella

Berriasella is a discoidal evolute perisphinctacean ammonite, and type genus for the neocomitid subfamily Berriasellinae. Its ribbing is distinct, consisting of both simple and bifurcated ribs that extend from the umbilical seam across the venter; its whorl section generally compressed, the venter more or less narrowly rounded. The species Berriasella jacobi traditionally has been regarded an index fossil defining the base of the Cretaceous, however since 2016 this had been replaced by the first occurrence of Calpionella alpina. Some authors regard B. jacobi as instead belonging to the genus Strambergella.

Berriasella

Hectonichus · 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
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 million years on record.

The record covers at least 143.1 Mya to 137.05 Mya. No occurrence read is dated outside 161.5 Mya to 132.6 Mya.

Middle Jurassic — about 0 of 176 occurrencesLate Jurassic — about 44 of 176 occurrencesLate JurassicEarly Cretaceous — about 132 of 176 occurrencesEarly Cretaceous162–161 Mya — about 0.1 occurrences161–160 Mya — about 0.3 occurrences160–159 Mya — about 0.3 occurrences159–158 Mya — about 0.3 occurrences158–157 Mya — about 0.3 occurrences157–156 Mya — about 0.3 occurrences156–155 Mya — about 0.3 occurrences155–154 Mya — about 0.3 occurrences154–153 Mya — about 0.3 occurrences153–152 Mya — about 0.3 occurrences152–151 Mya — about 0.3 occurrences151–150 Mya — about 0.3 occurrences150–149 Mya — about 0.4 occurrences149–148 Mya — about 1 occurrence148–147 Mya — about 1 occurrence147–146 Mya — about 1 occurrence146–145 Mya — about 1 occurrence145–144 Mya — about 18 occurrences144–143 Mya — about 19 occurrences143–142 Mya — about 30 occurrences142–141 Mya — about 30 occurrences141–140 Mya — about 18 occurrences140–139 Mya — about 17 occurrences139–138 Mya — about 15 occurrences138–137 Mya — about 15 occurrences137–136 Mya — about 1 occurrence136–135 Mya — about 1 occurrence135–134 Mya — about 1 occurrence134–133 Mya — about 1 occurrence133–132 Mya — about 0.5 occurrences143.1 Mya137.05 Mya162.1 Mya132 Mya

176 occurrences of Berriasella 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

176 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

28 formations

Miravetes — 38.09°N, 1.89°WMiravetes — 38.07°N, 1.81°WLa Caja — 23.70°N, 100.87°WLa Caja — 23.68°N, 100.85°WLa Caja — 23.64°N, 100.86°WLa Caja — 23.61°N, 100.82°WStramberk — 49.58°N, 18.11°EHajar — 14.30°N, 48.49°EHajar — 14.55°N, 48.04°ESzentivánhegy Limestone — 47.17°N, 17.79°EChia Gara — 37.01°N, 43.40°ERogozno — 51.98°N, 19.02°EShal — 37.34°N, 48.75°EChigan — 43.03°N, 132.32°ELo Valdés — 33.75°S, 70.03°WLo Valdés — 34.27°S, 69.93°WTollo — 38.07°N, 1.81°WPieniny Limestone — 49.42°N, 20.30°EPieniny Limestone — 49.43°N, 20.03°EGuchuochun — 28.08°N, 86.00°EGiumal Sandstone — 32.28°N, 78.02°EPunta Moreno — 7.62°S, 78.88°WTaraises — 24.73°N, 103.53°WBrechas de Buenavista — 4.13°N, 73.68°WHimalia Ridge — 70.75°S, 68.50°WCarbonera — 24.22°N, 102.82°WAnchorage — 62.60°S, 61.17°WPresident Beaches — 62.60°S, 61.17°WGuasasa — 22.37°N, 84.05°WLatady — 76.13°S, 69.67°WPicún Leufú — 38.87°S, 70.20°W

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The named rock units Berriasella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 further formations hold fewer occurrences each and are not listed. 44 occurrences have no formation on record, which is common for older literature.

Berriasella and its relatives

Early Cretaceous

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

Found in the same rock

305 taxa

The Paleobiology Database records 115 sites for Berriasella, 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

41 references

Each of the 176 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. 29 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 content1

Picture of Berriasella

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

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Uhlig 1905)