Praepolyplectus

Praepolyplectus is an extinct genus of cephalopod belonging to the family Hildoceratidae. It is sometimes considered to be a synonym of Polyplectus. While it is currently not known from which species it has evolved, there are multiple theories about its origin. Formerly has been suggested, that it has evolved from Harpoceratinae, but possible predecessor can be also in genus Protogrammoceras. Perharps it can be Protogrammoceras meneghinii. Its fossils were found in Italy, Spain and Morocco.

No picture of Praepolyplectus was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Praepolyplectus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
HarpoceratinaePBDB
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 most 1.3 million years on record.

Every occurrence read is dated to somewhere between 184.2 Mya and 182.9 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Jurassic — about 14 of 14 occurrencesEarly Jurassic184–184 Mya — about 0.4 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–184 Mya — about 0.8 occurrences184–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.8 occurrences183–183 Mya — about 0.4 occurrences184.7 Mya182.4 Mya

14 occurrences of Praepolyplectus on record, most of them in the Early 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

14 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

3 formations

Bugarone — 43.33°N, 13.22°EKisgerecse — 47.66°N, 18.47°ETagoudite — 31.98°N, 5.01°W

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The named rock units Praepolyplectus has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Praepolyplectus and its relatives

Early Jurassic

Where Praepolyplectus and its relatives were recorded in the Early Jurassic.

Found in the same rock

29 taxa

The Paleobiology Database records 14 sites for Praepolyplectus, 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

3 references

Each of the 14 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 content0

No picture of Praepolyplectus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Praepolyplectus, or no answer at all. This entry cannot say which.

No 3D scan of Praepolyplectus 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.

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 itHarpoceratinae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Venturi 1981