Ausktribosphenos nyktos
Ausktribosphenos is an extinct genus of mammals from the Early Cretaceous of Australia, sometime between 121 - 113 Ma during the Aptian. The only recorded species, Ausktribosphenos nyktos, was found on Flat Rocks in the Wonthaggi Formation, Victoria.

Kielan−Jaworowska, Z., Cifelli, R.L., and Luo, Z.−X. · 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
- AusktribosphenosPBDB
- Diet
- insectivorePBDB, for Mammaliaformes
- Life habit
- scansorialPBDB, for Mammaliaformes
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Mammalia
Time the record covers
At most 4.4 million years on record.
The one occurrence read is dated to somewhere between 125.77 Mya and 121.4 Mya, which is a dating window rather than a span.
1 occurrence of Ausktribosphenos nyktos on record, most of them in the Early Cretaceous. 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- Early Cretaceous100%
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
- "Wonthaggi" Formation · Strzelecki Group1
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The named rock units Ausktribosphenos nyktos has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Ausktribosphenos nyktos and its relatives
Early CretaceousWhere Ausktribosphenos nyktos and its relatives were recorded in the Early Cretaceous.
Found in the same rock
26 taxa- Actinopterygii1 site
- Ankylosauria1 site
- Atlascopcosaurus loadsi1 site
- Australovenator wintonensis1 site
- Avetheropoda1 site
- Bishops whitmorei1 site
- Corriebaatar marywaltersae1 site
- Dipnoi1 site
- Enantiornithes1 site
- Galleonosaurus dorisae1 site
- Iguanodontia1 site
- Kryoparvus gerriti1 site
- Maniraptora1 site
- Megaraptora1 site
- Monotremata1 site
- Multituberculata1 site
- Neoceratodus nargun1 site
- Ornithomimidae1 site
- Ornithopoda1 site
- Plesiosauria1 site
- Pterosauria1 site
- Qantassaurus intrepidus1 site
- Teinolophos trusleri1 site
- Testudinata1 site
The Paleobiology Database records 1 site for Ausktribosphenos nyktos, 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
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 Ausktribosphenos nyktos
- Source
- Wikidata/Commons
- Credit
- Kielan−Jaworowska, Z., Cifelli, R.L., and Luo, Z.−X.
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Ausktribosphenos nyktos 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 itAusktribosphenos through timeFormations of the Early CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Rich et al. 1997