Ainiktozoon loganense
Ainiktozoon loganense, is a fossil arthropod from the Silurian of Scotland. It was found at the Birk Knowes site, part of the Patrick Burn Formation, near Lesmahagow. Originally described as an early chordate, recent studies suggest that it was in fact an arthropod, more precisely a thylacocephalan crustacean.

Ghedoghedo · CC BY-SA 3.0 · 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
- AiniktozoonPBDB
- Diet
- omnivorePBDB, for Thylacocephala
- Life habit
- nektobenthicPBDB, for Thylacocephala
- Motility
- actively mobilePBDB, for Thylacocephala
- Vision
- well-developedPBDB, for Thylacocephala
Time the record covers
At most 5.7 million years on record.
The one occurrence read is dated to somewhere between 438.6 Mya and 432.9 Mya, which is a dating window rather than a span.
1 occurrence of Ainiktozoon loganense on record, most of them in the Silurian. 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
1 occurrences- Silurian100%
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
1 formation
- Patrick Burn Formation · Priesthill Group1
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The named rock units Ainiktozoon loganense has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Ainiktozoon loganense and its relatives
SilurianWhere Ainiktozoon loganense and its relatives were recorded in the Silurian.
Found in the same rock
10 taxa- ? Hardieopterus lanarkensis1 site
- Ceratiocaris papilio1 site
- Cyamocephalus loganensis1 site
- Dictyocaris ramsayi1 site
- Erettopterus (Pterygotus) bilobus1 site
- Hughmilleria1 site
- Jamoytius kerwoodi1 site
- Logania scotica1 site
- Slimonia acuminata1 site
- Taitia catena1 site
The Paleobiology Database records 1 site for Ainiktozoon loganense, 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
1 referenceEach of the 1 occurrence 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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Ainiktozoon loganense
- Source
- Wikipedia/Commons
- Credit
- Ghedoghedo
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Ainiktozoon loganense 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
- Source
- Wikipedia, “Ainiktozoon”
- 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 itAiniktozoon through timeFormations of the SilurianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Scourfield 1937