Name: Dapedium.
Phonetic: Da-pee-de-um.
Named By: Leach‭ ‬-‭ ‬1822.
Synonyms: Aechmodus,‭ ‬Amblyurus,‭ ‬Dapedius cycloides,‭ ‬Dapedius politus,‭ ‬Omalopleurus,‭ ‬Tetragonolepis angulifer,‭ ‬Tetragonolepis dorsalis,‭ ‬Tetragonolepis magnevillei,‭ ‬Tetragonolepis pholidotus,‭ ‬Tetragonolepis radiatus.
Classification: Chordata,‭ ‬Osteichthyes,‭ ‬Semionotiformes,‭ ‬Dapediidae.
Species: D.‭ ‬caelatum,‭ ‬D.‭ ‬granulatum,‭ ‬D.‭ ‬noricum,‭ ‬D.‭ ‬pholidotum,‭ ‬D.‭ ‬politum,‭ ‬D.‭ ‬punctatum,‭ ‬D.‭ ‬stollorum,‭ ‬D.‭ ‬angulifer,‭ ‬D.‭ ‬caelatus,‭ ‬D.‭ ‬colei,‭ ‬D.‭ ‬dorsalis,‭ ‬D.‭ ‬magnevillei,‭ ‬D.‭ ‬milloti,‭ ‬D.‭ ‬orbis,‭ ‬D.‭ ‬pholidotus,‭ ‬D.‭ ‬punctatus,‭ ‬D.‭ ‬radiatus.
Diet: Carnivore.
Size: Between‭ ‬9‭ ‬and‭ ‬40‭ ‬centimetres long,‭ ‬depending upon the species.
Known locations: Across Europe.
Time period: Rhaetian of the Triassic through to the Toarcian of the Jurassic.
Fossil representation: Multiple individuals.

       The Dapedium genus of fish seem to have been among the most common in the seas of the late Triassic and early Jurassic.‭ ‬The body was deep and round and depending upon he species could be anywhere between nine and forty centimetres long,‭ ‬with the species D.‭ ‬noricum currently known to be the smallest.‭ ‬The body was covered with large well developed ganoid scales while the skull was also armoured with dermal plates.‭ ‬The pectoral and pelvic fins were small in relation to the body,‭ ‬which suggests that Dapedium were not especially fast swimming fish.
       Dapedium had small but robust teeth with additional crushing teeth on the palate.‭ ‬These teeth are suggestive of a diet that included small shelled molluscs and crustaceans,‭ ‬a diet that also supports a slower less active lifestyle and therefore lack of a need for faster swimming adaptations.

Further reading
-‭ ‬Hypsisomatic Semionotidae‭ (‬Pisces,‭ ‬Actinopterygii‭) ‬from the Upper Triassic of Lombardy‭ (‬N.‭ ‬Italy‭)‬.‭ ‬-‭ ‬A.‭ ‬Tintori‭ ‬-‭ ‬1983.
-‭ ‬A new species of Dapedium Leach,‭ ‬1822‭ (‬Actinopterygii,‭ ‬Neopterygii,‭ ‬Semionotiformes‭) ‬from the Early Jurassic of south Germany.‭ ‬-‭ ‬D.‭ ‬Thies‭ & ‬R.‭ ‬B.‭ ‬Hauff‭ ‬-‭ ‬2011.


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