Praeconia rhomboidalis

Praeconia rhomboidalis

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
PraeconiaPBDB
Diet
suspension feederPBDB, for Crassatelloidea
Life habit
infaunalPBDB, for Crassatelloidea
Motility
facultatively mobilePBDB, for Crassatelloidea
Vision
blindPBDB, for Crassatelloidea
Environment
marinePBDB, for Crassatelloidea

Time the record covers

At least 7.4 million years on record.

The record covers at least 165.3 Mya to 157.9 Mya. No occurrence read is dated outside 168.2 Mya to 154.8 Mya.

Middle Jurassic — about 7 of 9 occurrencesMiddle JurassicLate Jurassic — about 2 of 9 occurrencesLate Jurassic168–168 Mya — about 1.0 occurrences168–167 Mya — about 1.0 occurrences167–167 Mya — about 1.0 occurrences167–166 Mya — about 1.0 occurrences166–166 Mya — about 1.0 occurrences166–165 Mya — about 1.0 occurrences165–165 Mya — about 0.2 occurrences165–164 Mya — about 0.1 occurrences164–164 Mya — about 0.1 occurrences164–163 Mya — about 0.1 occurrences163–163 Mya — about 0.1 occurrences163–162 Mya — about 0.1 occurrences162–162 Mya — about 0.1 occurrences162–162 Mya — about 0.1 occurrences158–158 Mya — about 0.2 occurrences158–157 Mya — about 0.3 occurrences157–157 Mya — about 0.3 occurrences157–156 Mya — about 0.3 occurrences156–156 Mya — about 0.3 occurrences156–155 Mya — about 0.3 occurrences155–155 Mya — about 0.3 occurrences165.3 Mya157.9 Mya168.7 Mya154.3 Mya

9 occurrences of Praeconia rhomboidalis 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

9 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

Calcaire de Caen — 48.82°N, 0.03°ECalcaire de Caen — 48.97°N, 0.13°WCalcaires marno-crayeux inferieurs — 49.87°N, 4.06°ECalcaires marno-crayeux inferieurs — 49.88°N, 4.04°ECoral Rag — 53.98°N, 1.53°WUpper Calcareous Grit — 53.98°N, 1.53°WJhurio — 23.50°N, 70.50°E

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The named rock units Praeconia rhomboidalis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Praeconia rhomboidalis and its relatives

Middle Jurassic

Where Praeconia rhomboidalis and its relatives were recorded in the Middle Jurassic.

Found in the same rock

134 taxa

The Paleobiology Database records 8 sites for Praeconia rhomboidalis, 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

5 references

Each of the 9 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 Praeconia rhomboidalis

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

No 3D scan of Praeconia rhomboidalis 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 itPraeconia through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Phillips 1829