Ichthyodectiformes
Ichthyodectiformes is an extinct order of marine stem-teleost ray-finned fish. The order is named after the genus Ichthyodectes, established by Edward Drinker Cope in 1870. Ichthyodectiforms are usually considered to be some of the closest relatives of the teleost crown group.

Creator: Dmitry Bogdanov · CC BY 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- Sits inside
- TeleosteiPBDB
- Diet
- carnivorePBDB
- Life habit
- nektonicPBDB
- Motility
- actively mobilePBDB
Time the record covers
At least 108 million years on record.
The record covers at least 149.2 Mya to 41.03 Mya. No occurrence read is dated outside 152.21 Mya to 37.71 Mya.
213 occurrences of Ichthyodectiformes on record, most of them in the Late Cretaceous. 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
213 occurrences- Late Jurassic9%
- Early Cretaceous12%
- Late Cretaceous78%
- Paleoceneunder 1%
- Eoceneunder 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
76 formations
- Niobrara Formation · Colorado Group16
- Mooreville Chalk Formation · Selma Group13
- Greenhorn Limestone Formation · Colorado Group11
- Solnhofen Formation8
- Romualdo Formation · Santana Group6
- Carlile Shale Formation · Colorado Group5
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The named rock units Ichthyodectiformes has been recovered from, largest first. Drawn where the rock is now, not where it formed. 52 further formations hold fewer occurrences each and are not listed. 39 occurrences have no formation on record, which is common for older literature.
Ichthyodectiformes and its relatives
Late CretaceousWhere Ichthyodectiformes and its relatives were recorded in the Late Cretaceous.
Found in the same rock
1,900 taxa- Xiphactinus audax38 sites
- Cretalamna appendiculata29 sites
- Cretoxyrhina mantelli28 sites
- Squalicorax falcatus27 sites
- Enchodus petrosus22 sites
- Protosphyraena21 sites
- Archaeolamna kopingensis20 sites
- Enchodus20 sites
- Pachyrhizodus minimus20 sites
- Enchodus gladiolus18 sites
- Squalicorax kaupi17 sites
- Ischyrhiza mira16 sites
- Squalicorax16 sites
- Enchodus shumardi15 sites
- Theropoda15 sites
- Hadrosauridae14 sites
- Hybodus14 sites
- Ichthyodectidae14 sites
- Teleostei14 sites
- Crocodylia13 sites
- Ichthyodectes ctenodon13 sites
- Pachyrhizodus13 sites
- Paralbula casei13 sites
- Scapanorhynchus texanus13 sites
The Paleobiology Database records 160 sites for Ichthyodectiformes, 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
125 references- The vertebrate fauna of the Selma Formation of Alabama, part VIII, the fishes18
- Monographie der fossilien Fische aus den Lithographischen Schiefern Bayerns8
- Fossil vertebrates from the marine Cretaceous of Manitoba7
- New Fossiliferous Sites of the Romualdo Formation, Lower Cretaceous, Araripe Basin, Exu, Pernambuco, Northeast of Brazil5
- Fossil fishes from the basal Greenhorn Limestone (Upper Cretaceous, Late Cenomanian) in Russell County, Kansas5
- The English Chalk and London Clay: two remarkable British bony fish Lagerstatten4
- Cenomanian bonebed faunas from the northeastern margin, Western Interior Seaway4
- An associated dentition and calcified vertebral centra of the Late Cretaceous elasmobranch, Ptychodus anonymus Williston 19004
- Fossil marine actinopterygian fishes from the Kaskapau Formation (Upper Cretaceous: Turonian) near Watino, Alberta4
- Fauna and predator-prey relationships of Ettling, an actinopterygian fish-dominated Konservat-Lagerstätte from the Late Jurassic of Southern Germany3
- Im Reich der Meerengel. Der Nusplinger Plattenkalk und seine Fossilien3
- A new genus and species of gigantic marine turtles (Chelonioidea: Cheloniidae) from the Maastrichtian of the Harrana Fauna-Jordan3
Each of the 213 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. 113 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 Ichthyodectiformes
- Source
- Wikipedia/Commons
- Credit
- Creator: Dmitry Bogdanov
- Licence
- CC BY 3.0
- Commercial use
- the licence allows it
No 3D scan of Ichthyodectiformes 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 itTeleostei through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Bardack and Sprinkle 1969