Dicroloma

Dicroloma

Ghedoghedo · CC BY-SA 4.0 · via Wikidata/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
AporrhainaePBDB
Diet
detritivorePBDB, for Aporrhaidae
Life habit
semi-infaunalPBDB, for Aporrhaidae
Motility
slow-movingPBDB, for Aporrhaidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 161 million years on record.

The record covers at least 199.5 Mya to 37.71 Mya. No occurrence read is dated outside 201.4 Mya to 33.9 Mya.

Late Triassic — about 0 of 78 occurrencesEarly Jurassic — about 5 of 78 occurrencesEarly JurassicMiddle Jurassic — about 30 of 78 occurrencesLate Jurassic — about 26 of 78 occurrencesLate JurassicEarly Cretaceous — about 10 of 78 occurrencesEarly CretaceousLate Cretaceous — about 3 of 78 occurrencesLate CretaceousPaleocene — about 2 of 78 occurrencesEocene — about 2 of 78 occurrencesEoceneOligocene — about 0 of 78 occurrences205–199 Mya — about 3 occurrences193–187 Mya — about 0.6 occurrences187–182 Mya — about 1 occurrence176–170 Mya — about 3 occurrences170–164 Mya — about 15 occurrences164–158 Mya — about 17 occurrences158–152 Mya — about 14 occurrences152–147 Mya — about 6 occurrences147–141 Mya — about 0.4 occurrences123–118 Mya — about 2 occurrences118–112 Mya — about 2 occurrences112–106 Mya — about 4 occurrences106–100 Mya — about 2 occurrences100–94 Mya — about 2 occurrences94–89 Mya — about 1 occurrence71–65 Mya — about 0.2 occurrences65–60 Mya — about 2 occurrences60–54 Mya — about 0.4 occurrences54–48 Mya — about 0.7 occurrences42–36 Mya — about 0.4 occurrences36–31 Mya — about 0.6 occurrences199.5 Mya37.71 Mya205 Mya31 Mya

78 occurrences of Dicroloma 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

78 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

25 formations

Chari — 23.50°N, 70.50°EOxford Clay — 52.00°N, 1.00°WOxford Clay — 53.50°N, 0.33°WOxford Clay — 51.75°N, 1.18°WWhite Limestone — 51.75°N, 1.17°WWhite Limestone — 51.80°N, 1.88°WGrès verts helvétiques — 46.13°N, 6.77°EGrès verts helvétiques — 46.04°N, 6.62°ETrigonia clavellata — 50.80°N, 2.28°WCotinguiba — 10.76°S, 37.07°WKimmeridge Clay — 50.63°N, 2.35°WKimmeridge Clay — 53.50°N, 0.33°WMarnes de Latrecey — 47.98°N, 4.85°EDakhla — 25.33°N, 30.58°ETataouine — 32.57°N, 10.35°ETataouine — 32.92°N, 10.45°EDogger — 54.41°N, 0.87°WArgiles a Lopha gregarea — 49.30°N, 0.07°WArgile de Villerville — 49.37°N, 0.08°EAlcobaca — 39.32°N, 9.35°WWest Walton Beds — 53.50°N, 0.33°WAmpthill Clay — 53.50°N, 0.33°WCalcaire de Caen — 48.97°N, 0.13°WWaihao Greensand — 44.78°S, 171.17°ETordillo — 39.33°S, 70.17°WConglomérats de Bargy — 46.02°N, 6.46°EAntalo Limestone — 13.68°N, 39.58°ESa Wer — 10.16°N, 43.06°EEsna — 25.44°N, 32.36°EUpper Lias — 51.80°N, 1.88°W

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The named rock units Dicroloma has been recovered from, largest first. Drawn where the rock is now, not where it formed. One further formation holds fewer occurrences and is not listed. 28 occurrences have no formation on record, which is common for older literature.

Dicroloma and its relatives

Middle Jurassic

Where Dicroloma and its relatives were recorded in the Middle Jurassic.

Found in the same rock

1,064 taxa

The Paleobiology Database records 63 sites for Dicroloma, 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

30 references

Each of the 78 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. 18 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 Dicroloma

Credit
Ghedoghedo
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Dicroloma 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 itAporrhainae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Gabb 1868)