| Ichthyodectidae Temporal range: Late Jurassic-Late Cretaceous 156.0–65.5 Ma |
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|---|---|
| 1. Xiphactinus audax 2. Ichthyodectes ctenodon 3. Cladocyclus gardneri 4. Chirocentrites sp. |
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| Conservation status | |
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Fossil
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Superclass: | Osteichthyes |
| Class: | Actinopterygii |
| Subclass: | Neopterygii |
| Infraclass: | Teleostei |
| Superorder: | Osteoglossomorpha |
| Order: | Ichthyodectiformes |
| Suborder: | Ichthyodectoidei |
| Family: | Ichthyodectidae Crook, 1892 |
| Subfamilies | |
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Ichthyodectinae |
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| Synonyms | |
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Cladocyclidae |
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The family Ichthyodectidae (literally "fish-biters") was a family of marine actinopterygian fish. Sometimes classified in the primitive bony fish order Pachycormiformes, they are today generally regarded as members of the "bulldog fish" order Ichthyodectiformes in the far more advanced Osteoglossomorpha. The type genus is Ichthyodectes, established by Edward Drinker Cope in 1870.
They were most diverse throughout the Cretaceous period, though Thrissops fossils are known from the Oxfordian-Kimmeridgian boundary in the Late Jurassic. Most ichthyodectids ranged between 1 and 5 meters (3–15 ft) in length. All known taxa were predators, feeding on smaller fish; in several cases, larger Ichthyodectidae preyed on smaller members of the family. Some species had remarkably large teeth, though others, such as Gillicus arcuatus, had small ones and sucked in their prey.
The basal phylogeny is very badly resolved, leading to many ichthyodectids that are simply known to be rather primitive, but where nothing certain can be said about their precise relationships.[1]
Basal or incertae sedis
Subfamily Saurodontinae
Subfamily Ichthyodectinae