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.[1]
They were most diverse throughout the Cretaceous period, though basal forms like Thrissops, Occithrissops and Allothrissops are known from the Middle-Late Jurassic of Europe and North America. They were almost entirely wiped out by the Cretaceous-Paleogene extinction event, but a single species, Saurocephalus lanciformis, appears to have survived into the earliest Paleocene (Danian).[2]
Most ichthyodectiforms ranged between 1 and 5 meters (3–15 ft) in length. Most of known taxa were predators, feeding on smaller fish; in several cases, larger ichthyodectiforms preyed on smaller members of the order. Some species had remarkably large teeth, though others, such as Gillicus arcuatus, had small ones and sucked in their prey. Heckelichthys preopercularis is a rare example of non-predatory ichthyodectiform, more likely to be microphagous, fed on small particles.[3] There is evidence that at least one species, Xiphactinus audax, may have been endothermic ("warm-blooded").[4]
^Nelson, Joseph S.; Grande, Terry C.; Wilson, Mark V. H. (2016). Fishes of the World (5th ed.). John Wiley & Sons. ISBN 9781118342336.
^Boles, Zachary; Ullmann, Paul; Putnam, Ian; Ford, Mariele; Deckhut, Joseph (2024). "New vertebrate microfossils expand the chondrichthyan and actinopterygian fauna of the Maastrichtian–Danian Hornerstown Formation in New Jersey". Acta Palaeontologica Polonica. 69. doi:10.4202/app.01117.2023. ISSN 0567-7920.
^Baños-Rodríguez, Rocio Elizabeth; González-Rodríguez, Katia Adriana; Wilson, Mark V. H.; González-Martínez, Jorge Alberto (2020-06-01). "A new species of Heckelichthys from the Muhi Quarry (Albian–Cenomanian) of central Mexico". Cretaceous Research. 110: 104415. Bibcode:2020CrRes.11004415B. doi:10.1016/j.cretres.2020.104415. ISSN 0195-6671. S2CID 213275574.
^Ferrón, H. G. (2019). "Evidence of endothermy in the extinct macropredatory osteichthyan Xiphactinus audax (Teleostei, Ichthyodectiformes)". Journal of Vertebrate Paleontology. 39 (6): e1724123. Bibcode:2019JVPal..39E4123F. doi:10.1080/02724634.2019.1724123. hdl:1983/e6d12da6-4f25-46ce-bb14-74fd2beddd82. S2CID 216158318.
and 30 Related for: Ichthyodectiformes information
Ichthyodectiformes is an extinct order of marine stem-teleost ray-finned fish. The order is named after the genus Ichthyodectes, established by Edward...
The Solnhofen Plattenkalk, a collective term of multiple Late Jurassic lithographic limestones in southeastern Germany, is famous for its well preserved...
of Eubiodectes libanicus (Pictet & Humbert, 1866) and some other ichthyodectiformes (Teleostei): phylogenetic implications". Journal of Systematic Palaeontology...
During the time of the deposition of the Niobrara Chalk, much life inhabited the seas of the Western Interior Seaway. By this time in the Late Cretaceous...
†Leptolepidiformes Order †Crossognathiformes Taverne 1989 Order †Ichthyodectiformes Bardeck & Sprinkle 1969 Teleocephala de Pinna 1996 s.s. Megacohort...
†Pholidophoriformes Order †Dorsetichthyiformes Order †Leptolepidiformes Order †Ichthyodectiformes Supercohort Teleocephala Order †Crossognathiformes (excluding Varasichthyidae)...
of the López de Bertodano Formation was dominated by Enchodus and ichthyodectiformes. Known fossils of Mosasaurus have typically been recovered from deposits...
The largest prehistoric animals include both vertebrate and invertebrate species. Many of them are described below, along with their typical range of size...
Hiodontiformes, including the mooneye and goldeye Order Lycopteriformes Order Ichthyodectiformes † Superorder Elopomorpha Order Elopiformes, including the ladyfishes...
de Nardò. 9°. Note complementaire sur le saurodontinae (Teleostei, Ichthyodectiformes): Saurodon elongatus, sp. nov. Studi e Ricerche sui Giacimenti Terziari...
phylogenetic position of Aidachar paludalis Nesov, 1981 (Actinopterygii, Ichthyodectiformes) from the Late Cretaceous of Uzbekistan". Proceedings of the Zoological...
"Osteology of Eubiodectes libanicus (Pictet & Humbert, ) and some other ichthyodectiformes (Teleostei): phylogenetic implications". Journal of Systematic Palaeontology...
fossil specimen 22 meters (72 feet) long was unearthed. Ichthyodectiformes The order Ichthyodectiformes (literally "fish-biters") was a family of marine actinopterygian...
"Osteology of Eubiodectes libanicus (Pictet & Humbert, ) and some other ichthyodectiformes (Teleostei): phylogenetic implications". Journal of Systematic Palaeontology...
Macrosemiidae or Ophiopsiellidae. Aidachar A. pankowskii A member of Ichthyodectiformes Bartschichthys B. sp. Isolated pinnulae (spines that support each...
pelvic fins. Thrissops was one of the smaller members of the order Ichthyodectiformes, which also included giants like Xiphactinus and Saurodon. Roberts...
in the López de Bertodano Formation are dominated by Enchodus and ichthyodectiformes. A large ammonite fauna is known from this site, including the abnormal...
and several bony fishes from the groups Teleostei, Actinopterygii, Ichthyodectiformes, and Sphenocephalidae. Shelled ammonites, a kind of aquatic, shelled...
†Dorsetichthyiformes Order †Leptolepidiformes Order †Crossognathiformes Order †Ichthyodectiformes Order †Tselfatiiformes Superorder Osteoglossomorpha Order †Lycopteriformes...
Rodney Berrell (May 2019). "Revision of Dugaldia emmilta (Teleostei, Ichthyodectiformes) from the Toolebuc Formation, Albian of Australia, with comments on...
chondrichthyes, the bony fish Enchodus and Apateodus, an indeterminate ichthyodectiformes, and several sharks such as Sphenodus, Cretalamna, and Notidanodon...
length about 20 centimetres (7.9 in). Although it is placed within Ichthyodectiformes, it have some different characters compared to other Jurassic ichthyodectiform...
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