Hibernaspis

Hibernaspis is a genus of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula. In life, species of Hibernaspis were thought to be benthic animals that lived most of their lives mostly buried in the sediment of a series of hypersaline lagoons. All amphiaspids are easily distinguished from other heterostracans in that all of the plates of the cephalothorax armor are fused into a single, muff-like unit, so that, in the case of Hibernaspis, the forebody of the living animal would have looked like a large guitar pic with serrated edges, with a pair of tiny, degenerated eyes, a pair of branchial openings for exhaling, and a simple, slit-like mouth at the anterior end.

Hibernaspis

Nobu Tamura email:nobu.tamura@yahoo.com http://spinops.blogspot.com/ http://paleoexhibit.blogspot.com/ · CC BY-SA 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
HibernaspididaePBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At most 6.6 million years on record.

Every occurrence read is dated to somewhere between 419.62 Mya and 413.02 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Silurian — about 0 of 2 occurrencesDevonian — about 2 of 2 occurrencesDevonian420–420 Mya — about 0.0 occurrences420–419 Mya — about 0.1 occurrences419–419 Mya — about 0.1 occurrences419–419 Mya — about 0.1 occurrences419–419 Mya — about 0.1 occurrences419–418 Mya — about 0.1 occurrences418–418 Mya — about 0.1 occurrences418–418 Mya — about 0.1 occurrences418–418 Mya — about 0.1 occurrences418–417 Mya — about 0.1 occurrences417–417 Mya — about 0.1 occurrences417–417 Mya — about 0.1 occurrences417–417 Mya — about 0.1 occurrences417–416 Mya — about 0.1 occurrences416–416 Mya — about 0.1 occurrences416–416 Mya — about 0.1 occurrences416–416 Mya — about 0.1 occurrences416–415 Mya — about 0.1 occurrences415–415 Mya — about 0.1 occurrences415–415 Mya — about 0.1 occurrences415–415 Mya — about 0.1 occurrences415–414 Mya — about 0.1 occurrences414–414 Mya — about 0.1 occurrences414–414 Mya — about 0.1 occurrences414–414 Mya — about 0.1 occurrences414–413 Mya — about 0.1 occurrences413–413 Mya — about 0.1 occurrences413–413 Mya — about 0.0 occurrences420.1 Mya412.5 Mya

2 occurrences of Hibernaspis on record, most of them in the Devonian. 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

1 formation

Kureika — 66.94°N, 88.33°EKureika — 69.39°N, 88.21°E

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

Hibernaspis and its relatives

Devonian

Where Hibernaspis and its relatives were recorded in the Devonian.

Found in the same rock

16 taxa

The Paleobiology Database records 2 sites for Hibernaspis, 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 reference

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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Hibernaspis

Credit
Nobu Tamura email:nobu.tamura@yahoo.com http://spinops.blogspot.com/ http://paleoexhibit.blogspot.com/
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Hibernaspis 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 itHibernaspididae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Obruchev 1939