Diceras

Diceras is an extinct genus of fossil saltwater clams, marine heterodont bivalve molluscs. These bivalves were stationary epifaunal suspension feeders.

Diceras

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
DiceratidaePBDB
Diet
suspension feederPBDB, for Hippuritida
Life habit
epifaunalPBDB, for Diceratidae
Motility
stationaryPBDB, for Diceratidae
Vision
blindPBDB, for Bivalvia
Environment
marinePBDB, for Hippuritida

Time the record covers

At least 51 million years on record.

The record covers at least 157.9 Mya to 106.3 Mya. No occurrence read is dated outside 161.5 Mya to 100.5 Mya.

Middle Jurassic — about 0 of 41 occurrencesLate Jurassic — about 40 of 41 occurrencesLate JurassicEarly Cretaceous — about 1 of 41 occurrencesEarly CretaceousLate Cretaceous — about 0 of 41 occurrences163–161 Mya — about 0.2 occurrences161–158 Mya — about 1 occurrence158–156 Mya — about 15 occurrences156–154 Mya — about 16 occurrences154–152 Mya — about 5 occurrences150–148 Mya — about 0.5 occurrences148–146 Mya — about 0.9 occurrences146–144 Mya — about 0.5 occurrences144–142 Mya — about 0.1 occurrences108–106 Mya — about 0.1 occurrences106–104 Mya — about 0.4 occurrences104–101 Mya — about 0.4 occurrences101–99 Mya — about 0.2 occurrences157.9 Mya106.3 Mya163 Mya99 Mya

41 occurrences of Diceras 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

41 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

2 formations

Stramberk — 49.58°N, 18.12°EConglomérats de Bargy — 46.02°N, 6.46°E

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The named rock units Diceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 39 occurrences have no formation on record, which is common for older literature.

Diceras and its relatives

Late Jurassic

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

Found in the same rock

373 taxa

The Paleobiology Database records 22 sites for Diceras, 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 41 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 content2

Picture of Diceras

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

3D model

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

Smithsonian Open Access was 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 itDiceratidae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lamarck 1805