Ancorichnus sp.

Ancorichnus is an ichnogenus. Ancorichnus, is distinguished by structured mantle peripheral to a meniscate core. The mantle is not considered as a wall structure since it formed by the locomotive behaviour of the burrow producer. This ichnotaxon occurs in full relief at the top of grainstone beds 10 and 12. It is a non-branched, cylindrical, horizontal burrow with a diameter of 0.2-0.3 cm and 0.3-0.4 cm, respectively.

No picture of Ancorichnus sp. was found. Wikipedia and Wikidata were searched and had none. iDigBio and GBIF were not searched: the Paleobiology Database does not place Ancorichnus sp. firmly enough to tell it from something else bearing the same name, and a search on the name alone returns whichever of them was photographed. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

Time the record covers

At least 13 million years on record.

The record covers at least 168.2 Mya to 154.8 Mya. No occurrence read is dated outside 170.9 Mya to 143.1 Mya.

Middle Jurassic — about 1 of 2 occurrencesMiddle JurassicLate Jurassic — about 1 of 2 occurrencesLate JurassicEarly Cretaceous — about 0 of 2 occurrences171–170 Mya — about 0.2 occurrences170–170 Mya — about 0.4 occurrences170–169 Mya — about 0.4 occurrences169–168 Mya — about 0.1 occurrences155–154 Mya — about 0.1 occurrences154–153 Mya — about 0.1 occurrences153–152 Mya — about 0.1 occurrences152–151 Mya — about 0.1 occurrences151–150 Mya — about 0.1 occurrences150–149 Mya — about 0.1 occurrences149–148 Mya — about 0.1 occurrences148–147 Mya — about 0.1 occurrences147–146 Mya — about 0.1 occurrences146–145 Mya — about 0.1 occurrences145–144 Mya — about 0.1 occurrences144–144 Mya — about 0.1 occurrences144–143 Mya — about 0.0 occurrences168.2 Mya154.8 Mya171.5 Mya142.5 Mya

2 occurrences of Ancorichnus sp. 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

2 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

Morrison — 44.54°N, 107.85°WShaximiao — 29.57°N, 106.60°E

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

Ancorichnus sp. and its relatives

Middle Jurassic

Where Ancorichnus sp. and its relatives were recorded in the Middle Jurassic.

Found in the same rock

16 taxa

The Paleobiology Database records 2 sites for Ancorichnus sp., and this reads all of them. The number is how many of those sites it was catalogued from too.

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

2 references

Each of the 2 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content0

No picture of Ancorichnus sp. was found. Wikipedia and Wikidata were searched and had none.

iDigBio and GBIF were not searched: the Paleobiology Database does not place Ancorichnus sp. firmly enough to tell it from something else bearing the same name, and a search on the name alone returns whichever of them was photographed.

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

No 3D scan of Ancorichnus sp. was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.