Nectridea

Nectridea is an extinct order of lepospondyl tetrapods from the Carboniferous and Permian periods, including amphibious animals such as Diplocaulus. In appearance, they would have superficially resembled modern newts or aquatic salamanders, although they are not close relatives of modern amphibians (Lissamphibia). They were characterized by long, flattened tails to aid in swimming, as well as numerous features of the vertebrae.

Nectridea

Camelops · 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
LepospondyliPBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
brackish,freshwater,terrestrialPBDB, for Tetrapoda

Time the record covers

At least 57 million years on record.

The record covers at least 316.9 Mya to 259.857 Mya. No occurrence read is dated outside 323.4 Mya to 251.902 Mya.

Carboniferous — about 29 of 131 occurrencesCarboniferousPermian — about 102 of 131 occurrencesPermianEarly Triassic — about 0 of 131 occurrences325–322 Mya — about 0.3 occurrences322–320 Mya — about 0.6 occurrences320–317 Mya — about 3 occurrences317–315 Mya — about 4 occurrences315–312 Mya — about 0.8 occurrences312–310 Mya — about 0.9 occurrences310–307 Mya — about 8 occurrences307–305 Mya — about 2 occurrences305–303 Mya — about 2 occurrences303–300 Mya — about 7 occurrences300–298 Mya — about 3 occurrences298–295 Mya — about 3 occurrences295–293 Mya — about 9 occurrences293–290 Mya — about 18 occurrences290–288 Mya — about 4 occurrences288–285 Mya — about 5 occurrences285–283 Mya — about 8 occurrences283–280 Mya — about 15 occurrences280–278 Mya — about 15 occurrences278–275 Mya — about 15 occurrences275–273 Mya — about 6 occurrences273–270 Mya — about 0.5 occurrences270–268 Mya — about 0.5 occurrences268–265 Mya — about 0.4 occurrences265–263 Mya — about 0.3 occurrences263–260 Mya — about 0.2 occurrences260–258 Mya — about 0.5 occurrences258–255 Mya — about 0.6 occurrences255–253 Mya — about 0.4 occurrences253–250 Mya — about 0.1 occurrences316.9 Mya259.857 Mya325 Mya250 Mya

131 occurrences of Nectridea on record, most of them in the Permian. 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

131 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

36 formations

Vale — 32.94°N, 99.77°WVale — 33.70°N, 99.60°WVale — 33.78°N, 99.47°WVale — 33.60°N, 99.25°WVale — 32.13°N, 99.75°WVale — 32.23°N, 99.83°WVale — 32.98°N, 99.85°WVale — 33.67°N, 99.78°WGreene — 39.71°N, 80.82°WGreene — 39.78°N, 80.55°WGreene — 39.05°N, 81.49°WGreene — 39.75°N, 79.84°WGreene — 39.78°N, 80.60°WGreene — 39.68°N, 80.31°WGreene — 39.80°N, 80.81°WGreene — 39.87°N, 80.68°WGreene — 39.99°N, 80.54°WGreene — 40.01°N, 80.69°WGreene — 39.86°N, 80.39°WGreene — 39.66°N, 80.40°WGreene — 39.63°N, 80.57°WGreene — 39.65°N, 80.53°WGreene — 39.63°N, 80.70°WGreene — 39.24°N, 81.46°WGreene — 39.24°N, 81.41°WArroyo — 33.77°N, 99.22°WArroyo — 33.76°N, 99.14°WArroyo — 33.70°N, 99.27°WArroyo — 33.59°N, 99.26°WArroyo — 33.73°N, 99.36°WArroyo — 33.97°N, 99.20°WWellington — 36.16°N, 97.34°WWellington — 36.74°N, 97.42°WWellington — 36.35°N, 97.43°WWellington — 36.34°N, 97.33°WLueders — 33.75°N, 99.12°WLueders — 33.75°N, 99.15°WKladno — 49.71°N, 13.21°EHennessey — 34.19°N, 98.79°WHennessey — 35.17°N, 97.37°WChoza — 33.82°N, 99.56°WAbo — 35.77°N, 106.69°WAbo — 33.07°N, 107.22°WAbo — 34.30°N, 106.54°WGarber Sandstone — 34.53°N, 98.89°WGarber Sandstone — 34.58°N, 98.85°WBlack Prince Limestone — 31.73°N, 109.57°WWashington — 39.76°N, 81.00°WWashington — 39.99°N, 80.58°WCoolbaun Formation — 52.81°N, 7.20°WMiddle Coal Measures — 55.11°N, 1.52°WAdmiral — 33.62°N, 98.86°WCutler — 37.17°N, 109.85°WBead Mountain — 34.13°N, 98.62°WWaggoner Ranch — 33.82°N, 98.69°WPottsville — 33.90°N, 87.52°WIkakern — 30.83°N, 9.09°WGreeene — 39.90°N, 80.77°WUpper Kittanning Coal — 40.80°N, 80.47°WBond — 40.10°N, 87.83°WCasselman — 40.41°N, 79.79°W

Loading coastlines…

The named rock units Nectridea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 further formations hold fewer occurrences each and are not listed. 13 occurrences have no formation on record, which is common for older literature.

Nectridea and its relatives

Permian

Where Nectridea and its relatives were recorded in the Permian.

Found in the same rock

416 taxa

The Paleobiology Database records 86 sites for Nectridea, 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

47 references

Each of the 131 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. 35 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 content1

Picture of Nectridea

Credit
Camelops
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Nectridea 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 itLepospondyli through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Miall 1875)