''Eodiodon'' ("dawn ''
Diodon
Porcupinefishes or balloonfishes, are any of the various species of the genus ''Diodon'', the type genus of Diodontidae.
Distinguishing features
Fish of the genus ''Diodon'' have:
* two-rooted, movable spines (which are derived from modified s ...
''") is an extinct genus of
porcupinefish
Porcupinefish are medium-to-large fish belonging to the family Diodontidae from the order Tetraodontiformes which are also commonly called blowfish and, sometimes, balloonfish and globefish. The family includes about 18 species. They are sometime ...
that lived during the
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes ...
. It contains a single species, ''E. bauzai'' from the
Bartonian
The Bartonian is, in the International Commission on Stratigraphy's (ICS) geologic time scale, a stage or age in the middle of the Eocene Epoch or Series. The Bartonian Age spans the time between . It is preceded by the Lutetian and is follow ...
of Belgium, known from fossilized tooth plates. Its status as a distinct genus has been disputed, as it has been suggested that the unique features of its tooth plates may simply originate from dental wear, but more recent studies have affirmed their morphological distinctiveness.
It has also been suggested to belong to its own family, Eodiodontidae, but more recent studies have retained it in the Diodontidae.
See also
*
Prehistoric fish
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Prehistoric fish are early fish that are known only from fossil records. They are the earliest known vertebrates, and include the first and extinct fish that lived through the Cambrian to the Quaternary. The study of prehistoric fish is ...
*
List of prehistoric bony fish
This list of prehistoric bony fish is an attempt to create a comprehensive listing of all Genus, genera from the fossil record that have ever been considered to be bony fish (class Osteichthyes), excluding purely vernacular terms. The list includ ...
References
{{Tetraodontiformes-stub
†
A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species or languages). It is one of the mo ...
Monotypic prehistoric ray-finned fish genera
Prehistoric percomorph genera
Bartonian genera
Eocene fish of Europe
Fossils of Belgium
Fossil taxa described in 1952