Lithotrochus

Lithotrochus is a genus of marine trochid gastropods mainly known from the Early Jurassic epoch of South America. While long considered endemic to the fossil record of South America, findings from the Pogibshi Formation of Alaska suggest that the genus expanded its paleogeographical range from the Northern Hemisphere to South America during the Jurassic.

Lithotrochus

S. Mariel Ferrari, Santiago Bessone · CC BY 4.0 · 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
TrochidaePBDB
Diet
grazerPBDB, for Trochidae
Life habit
epifaunalPBDB, for Trochidae
Motility
actively mobilePBDB, for Trochidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At most 59 million years on record.

Every occurrence read is dated to somewhere between 201.4 Mya and 143.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Triassic — about 0 of 50 occurrencesEarly Jurassic — about 48 of 50 occurrencesEarly JurassicMiddle Jurassic — about 1 of 50 occurrencesMiddle JurassicLate Jurassic — about 0 of 50 occurrencesLate JurassicEarly Cretaceous — about 0 of 50 occurrences203–201 Mya — about 0.1 occurrences201–199 Mya — about 5 occurrences199–197 Mya — about 11 occurrences197–194 Mya — about 11 occurrences194–192 Mya — about 9 occurrences192–190 Mya — about 2 occurrences190–188 Mya — about 2 occurrences188–186 Mya — about 2 occurrences186–184 Mya — about 2 occurrences184–182 Mya — about 1 occurrence182–180 Mya — about 0.4 occurrences180–178 Mya — about 0.4 occurrences178–176 Mya — about 0.4 occurrences176–174 Mya — about 0.4 occurrences174–172 Mya — about 0.3 occurrences172–170 Mya — about 0.3 occurrences170–168 Mya — about 0.3 occurrences168–166 Mya — about 0.2 occurrences166–164 Mya — about 0.2 occurrences164–162 Mya — about 0.2 occurrences162–160 Mya — about 0.1 occurrences160–158 Mya — about 0.0 occurrences158–156 Mya — about 0.0 occurrences156–154 Mya — about 0.0 occurrences154–152 Mya — about 0.0 occurrences152–150 Mya — about 0.0 occurrences150–148 Mya — about 0.0 occurrences148–146 Mya — about 0.0 occurrences146–144 Mya — about 0.0 occurrences144–142 Mya — about 0.0 occurrences203 Mya142 Mya

50 occurrences of Lithotrochus 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

50 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

Lautaro — 29.01°S, 70.20°WLautaro — 27.97°S, 70.02°WLautaro — 28.20°S, 70.00°WLautaro — 28.12°S, 69.96°WLautaro — 28.66°S, 70.07°WAberhan Sinemur — 33.47°S, 70.75°WMulanguiñeu — 44.45°S, 70.38°WMulanguiñeu — 44.40°S, 70.57°WMulanguiñeu — 44.33°S, 70.34°WTres Esquinas — 34.92°S, 69.77°WLa Ternera — 28.03°S, 69.92°W

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The named rock units Lithotrochus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 31 occurrences have no formation on record, which is common for older literature.

Lithotrochus and its relatives

Early Jurassic

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

Found in the same rock

161 taxa

The Paleobiology Database records 49 sites for Lithotrochus, 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

10 references

Each of the 50 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 Lithotrochus

Credit
S. Mariel Ferrari, Santiago Bessone
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Lithotrochus 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 itTrochidae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Conrad 1855