Guildayichthyiformes

Guildayichthyidae is an extinct family of marine fish from the Mississippian Bear Gulch Limestone of Montana. It is the only family in the order Guildayichthyiformes. Guildayichthyids possess an uncommon mixture of primitive and modern characteristics in their skull bones.

Guildayichthyiformes

Gyik Toma (Tommy the paleobear) from Romania · CC BY 2.0 · 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
ActinopterygiiPBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At most 6.9 million years on record.

The one occurrence read is dated to somewhere between 330.3 Mya and 323.4 Mya, which is a dating window rather than a span.

Carboniferous — about 1 of 1 occurrenceCarboniferous331–330 Mya — about 0.0 occurrences330–330 Mya — about 0.0 occurrences330–330 Mya — about 0.0 occurrences330–329 Mya — about 0.0 occurrences329–329 Mya — about 0.0 occurrences329–329 Mya — about 0.0 occurrences329–329 Mya — about 0.0 occurrences329–328 Mya — about 0.0 occurrences328–328 Mya — about 0.0 occurrences328–328 Mya — about 0.0 occurrences328–328 Mya — about 0.0 occurrences328–327 Mya — about 0.0 occurrences327–327 Mya — about 0.0 occurrences327–327 Mya — about 0.0 occurrences327–327 Mya — about 0.0 occurrences327–326 Mya — about 0.0 occurrences326–326 Mya — about 0.0 occurrences326–326 Mya — about 0.0 occurrences326–326 Mya — about 0.0 occurrences326–325 Mya — about 0.0 occurrences325–325 Mya — about 0.0 occurrences325–325 Mya — about 0.0 occurrences325–324 Mya — about 0.0 occurrences324–324 Mya — about 0.0 occurrences324–324 Mya — about 0.0 occurrences324–324 Mya — about 0.0 occurrences324–323 Mya — about 0.0 occurrences323–323 Mya — about 0.0 occurrences330.8 Mya322.9 Mya

1 occurrence of Guildayichthyiformes on record, most of them in the Carboniferous. 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

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

Limestone Coal — 55.92°N, 4.33°W

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

Guildayichthyiformes and its relatives

Carboniferous

Where Guildayichthyiformes and its relatives were recorded in the Carboniferous.

Found in the same rock

25 taxa

The Paleobiology Database records 1 site for Guildayichthyiformes, 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 reference

Each 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 Guildayichthyiformes

Credit
Gyik Toma (Tommy the paleobear) from Romania
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Guildayichthyiformes 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 itActinopterygii through timeFormations of the CarboniferousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lund 2000