Anguilliformes
Eels are ray-finned fish belonging to the order Anguilliformes, which consists of eight suborders, 20 families, 164 genera, and about 1000 species. Eels undergo considerable development from the early larval stage to the eventual adult stage and are usually predators.

Charles J. Sharp · 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- Also called
- eelPBDB
- Sits inside
- ElopomorphaPBDB
- Diet
- carnivorePBDB
- Life habit
- nektobenthicPBDB
- Motility
- actively mobilePBDB
Time the record covers
At least 110 million years on record.
The record covers at least 110.1 Mya to 11.7 ka. No occurrence read is dated outside 113.2 Mya to 0 Mya.
661 occurrences of Anguilliformes on record, most of them in the Eocene. The Paleobiology Database records this as a living group. 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
661 occurrences- Early Cretaceousunder 1%
- Late Cretaceous5%
- Paleocene2%
- Eocene35%
- Oligocene11%
- Miocene30%
- Pliocene6%
- Pleistocene9%
- Holoceneunder 1%
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
114 formations
- Moodys Branch Formation · Jackson Group14
- Cook Mountain Formation · Claiborne Group14
- Mount Harris Formation14
- Selsey Formation · Bracklesham Group11
- Miretrain Marl Formation11
- Waihao Greensand Formation10
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The named rock units Anguilliformes has been recovered from, largest first. Drawn where the rock is now, not where it formed. 90 further formations hold fewer occurrences each and are not listed. 309 occurrences have no formation on record, which is common for older literature.
Anguilliformes and its relatives
EoceneWhere Anguilliformes and its relatives were recorded in the Eocene.
Found in the same rock
3,932 taxa- Acropoma serrata42 sites
- Lactarius sigmoidalis27 sites
- Pomadasyidarum longicaudatus27 sites
- Gnathophis ornatus26 sites
- Parapercis finlayi26 sites
- Auchenoceros bicaudatus23 sites
- Carapus praecursor22 sites
- Bregmaceros21 sites
- Coelorinchus preaustralis21 sites
- Conger19 sites
- Diaphus19 sites
- Euclichthys novaezeelandiae19 sites
- Paraulopus19 sites
- Diaphus curvatus18 sites
- Hemerocoetes minutus18 sites
- Argentina subfrigida17 sites
- Coelorinchus divulgatus17 sites
- Lesueurigobius17 sites
- Echiodon teres16 sites
- Macruronus pukeuriensis16 sites
- Paralactarius ornatus16 sites
- Caulopsetta arnoglossoides14 sites
- Dentex14 sites
- Platycephalus maxwelli14 sites
The Paleobiology Database records 323 sites for Anguilliformes, and this reads 240 of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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
137 references- Reconstruction of the fossil marine bony fish fauna (Teleostei) from the Eocene to Pleistocene of New Zealand by means of otoliths. With studies of Recent congroid, morid and trachinoid otoliths134
- Middle and late Eocene fish otoliths from the eastern and southern USA58
- Fish otoliths from the New Zealand Tertiary23
- Otolithes de poissons du paléocanyon de saubrigues (chattien à langhien), aquitaine méridionale, France22
- The Selsey Division (Bracklesham Group) at Lee-on-the-Solent, Gosport, (Hants)17
- The systematic composition of the Eocene actinopterygian fish fauna from Monte Bolca, northern Italy, as known to date16
- 541. Some Pleistocene fish-otoliths from the Boso and Miura peninsulas16
- Distinctive "congrid type" fish otoliths from the lower Tertiary of the Gulf Coast (Pisces: Anguilliformes)16
- Early Eocene fish otoliths from the eastern and southern USA14
- Fish otoliths from the Lutetian of the Aquitaine Basin (SW France), a breakthrough in the knowledge of the European Eocene ichthyofauna14
- Fish otoliths from the early Miocene of Chile: a window into the evolution of marine bony fishes in the Southeast Pacific12
- Neue Untersuchungen an tertiaeren Fisch-Otolithen11
Each of the 661 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. 125 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 Anguilliformes
- Source
- Wikipedia/Commons
- Credit
- Charles J. Sharp
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Anguilliformes 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
- Source
- Wikipedia, “Eel”
- 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 itElopomorpha through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Greenwood et al. 1966