Placodermi

Searched as Placodermi indet.. The Paleobiology Database treats Placodermi as the accepted name.

Placoderms are vertebrate animals of the class Placodermi, an extinct group of prehistoric fish known from Paleozoic fossils during the Silurian and the Devonian periods. While their endoskeletons are mainly cartilaginous, their head and thorax were covered by articulated armoured plates, and the rest of the body was scaled or naked depending on the species.

Placodermi

User:Haplochromis · 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
Also called
armour-plated fishPBDB
Sits inside
GnathostomataPBDB
Diet
carnivorePBDB
Life habit
nektonicPBDB
Motility
actively mobilePBDB

Time the record covers

At least 47 million years on record.

The record covers at least 413.02 Mya to 365.2 Mya. No occurrence read is dated outside 419.62 Mya to 358.86 Mya.

Silurian — about 0 of 28 occurrencesDevonian — about 28 of 28 occurrencesDevonianCarboniferous — about 0 of 28 occurrences421–419 Mya — about 0.3 occurrences419–417 Mya — about 0.7 occurrences417–415 Mya — about 0.8 occurrences415–412 Mya — about 2 occurrences412–410 Mya — about 0.7 occurrences410–408 Mya — about 0.8 occurrences408–406 Mya — about 0.8 occurrences406–404 Mya — about 0.8 occurrences404–402 Mya — about 0.8 occurrences402–400 Mya — about 0.8 occurrences400–398 Mya — about 2 occurrences398–396 Mya — about 2 occurrences396–393 Mya — about 2 occurrences393–391 Mya — about 1.0 occurrences391–389 Mya — about 2 occurrences389–387 Mya — about 2 occurrences387–385 Mya — about 1 occurrence385–383 Mya — about 1 occurrence383–381 Mya — about 0.6 occurrences381–379 Mya — about 0.3 occurrences379–377 Mya — about 0.3 occurrences377–374 Mya — about 0.6 occurrences374–372 Mya — about 1 occurrence372–370 Mya — about 0.8 occurrences370–368 Mya — about 0.6 occurrences368–366 Mya — about 0.2 occurrences366–364 Mya — about 0.4 occurrences364–362 Mya — about 0.5 occurrences362–360 Mya — about 0.5 occurrences360–358 Mya — about 0.2 occurrences413.02 Mya365.2 Mya421 Mya358 Mya

28 occurrences of Placodermi on record, most of them in the Devonian. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

28 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

11 formations

Windmill Limestone — 39.96°N, 116.58°WLepel — 53.16°N, 30.80°ELepel — 53.32°N, 30.37°EUpper Drake Bay — 73.50°N, 100.60°WTarut — 27.40°N, 13.70°ESelscheid — 51.17°N, 7.92°ELittle Cedar — 42.00°N, 91.00°WEvieux — 50.45°N, 5.06°EBüdesheim — 50.19°N, 6.51°ESi Ka — 23.35°N, 105.29°EFour Mile Dam — 45.08°N, 83.43°WQujing — 26.25°N, 103.62°E

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The named rock units Placodermi has been recovered from, largest first. Drawn where the rock is now, not where it formed. 8 occurrences have no formation on record, which is common for older literature.

Placodermi and its relatives

Devonian

Where Placodermi and its relatives were recorded in the Devonian.

Found in the same rock

1,755 taxa

The Paleobiology Database records 481 sites for Placodermi, and this reads 240 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

17 references

Each of the 28 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. 5 further references are not listed. 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 content2

Picture of Placodermi

Credit
User:Haplochromis
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Credit
Senator
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itGnathostomata through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (M'Coy 1848)