Youngolepis

Youngolepis is a genus of prehistoric lungfish which lived during the Early Devonian period. Fossils of Y. praecursor have been found in the Xitun Formation of China & the Bac Bun Formation of Trang Xa, Vietnam. Some additional fossil specimens from the Xishancun Formation of China have been referred to Youngolepis sp. & represent the oldest known occurrence of the genus. In addition, Y. praecursor is also found in the Xujiachong formation

Youngolepis

Xindong Cui, Matt Friedman, Tuo Qiao, Yilun Yu & Min Zhu · CC BY 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
YoungolepididaePBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
lagoonal,marine,brackish,freshwaterPBDB, for Dipnoi

Time the record covers

At most 9 million years on record.

Every occurrence read is dated to somewhere between 419.62 Mya and 410.62 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Silurian — about 0 of 5 occurrencesDevonian — about 5 of 5 occurrencesDevonian420–419 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 occurrences418–417 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 occurrences416–415 Mya — about 0.1 occurrences415–415 Mya — about 0.1 occurrences415–415 Mya — about 0.1 occurrences415–414 Mya — about 0.2 occurrences414–414 Mya — about 0.3 occurrences414–414 Mya — about 0.3 occurrences414–413 Mya — about 0.3 occurrences413–413 Mya — about 0.3 occurrences413–413 Mya — about 0.3 occurrences413–412 Mya — about 0.3 occurrences412–412 Mya — about 0.3 occurrences412–412 Mya — about 0.3 occurrences412–411 Mya — about 0.3 occurrences411–411 Mya — about 0.3 occurrences411–411 Mya — about 0.3 occurrences411–410 Mya — about 0.1 occurrences420.1 Mya410.1 Mya

5 occurrences of Youngolepis 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

5 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

4 formations

Xitun — 25.49°N, 103.80°EBac Bun — 21.68°N, 106.56°EXujiachong — 25.57°N, 103.74°EKhao Loc — 23.06°N, 104.93°E

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

Youngolepis and its relatives

Devonian

Where Youngolepis and its relatives were recorded in the Devonian.

Found in the same rock

67 taxa

The Paleobiology Database records 4 sites for Youngolepis, 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

4 references

Each of the 5 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 Youngolepis

Credit
Xindong Cui, Matt Friedman, Tuo Qiao, Yilun Yu & Min Zhu
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Youngolepis 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 itYoungolepididae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Chang and Yu 1981