Redfieldiiformes

Redfieldiiformes is an extinct order of ray-finned fish (actinopterygians) which lived from the Early Triassic to Early Jurassic. Redfieldiiforms were fairly typical Triassic fish in overall anatomy. They had a fusiform body shape with thick, ganoine-covered scales. The dorsal and anal fins were large, positioned opposite from each other, and shifted back, close to the tail. The caudal fin was hemiheterocercal, with the vertebral column and body scales extending into an upper lobe equal in size and shape to the lower lobe. They also had several characteristic skeletal traits, such as a hatchet-shaped preopercle, a series of fulcra fringing the fins, a reduced number of branchiostegal rays, and a snout ornamented with tubercles.

Redfieldiiformes

Charles Lyell ( On the Geological Age of the Coal-Fields of Eastern Virginia as determined by Fossil Remains ) · Public Domain · 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 least 4.4 million years on record.

The record covers at least 241.464 Mya to 237 Mya. No occurrence read is dated outside 247 Mya to 201.4 Mya.

Early Triassic — about 0 of 2 occurrencesMiddle Triassic — about 1 of 2 occurrencesMiddle TriassicLate Triassic — about 1 of 2 occurrencesLate TriassicEarly Jurassic — about 0 of 2 occurrences248–246 Mya — about 0.1 occurrences246–245 Mya — about 0.3 occurrences245–243 Mya — about 0.3 occurrences243–242 Mya — about 0.3 occurrences242–240 Mya — about 0.0 occurrences238–237 Mya — about 0.0 occurrences237–235 Mya — about 0.0 occurrences235–234 Mya — about 0.0 occurrences234–232 Mya — about 0.0 occurrences232–231 Mya — about 0.0 occurrences231–229 Mya — about 0.0 occurrences229–227 Mya — about 0.0 occurrences227–226 Mya — about 0.0 occurrences226–224 Mya — about 0.0 occurrences224–223 Mya — about 0.0 occurrences223–221 Mya — about 0.0 occurrences221–219 Mya — about 0.0 occurrences219–218 Mya — about 0.0 occurrences218–216 Mya — about 0.0 occurrences216–215 Mya — about 0.0 occurrences215–213 Mya — about 0.0 occurrences213–212 Mya — about 0.0 occurrences212–210 Mya — about 0.0 occurrences210–208 Mya — about 0.0 occurrences208–207 Mya — about 0.0 occurrences207–205 Mya — about 0.0 occurrences205–204 Mya — about 0.0 occurrences204–202 Mya — about 0.0 occurrences202–200 Mya — about 0.0 occurrences241.464 Mya – 237 Mya247.9 Mya200.5 Mya

2 occurrences of Redfieldiiformes on record, most of them in the Middle Triassic. 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

Cerro de Las Cabras — 32.92°S, 69.22°W

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The named rock units Redfieldiiformes has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Redfieldiiformes and its relatives

Middle Triassic

Where Redfieldiiformes and its relatives were recorded in the Middle Triassic.

Found in the same rock

7 taxa

The Paleobiology Database records 2 sites for Redfieldiiformes, 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. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Redfieldiiformes

Credit
Charles Lyell ( On the Geological Age of the Coal-Fields of Eastern Virginia as determined by Fossil Remains )
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Redfieldiiformes 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 itActinopterygii through timeFormations of the Middle TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Berg 1940