Name:
Eurhinodelphis
(Well-nosed dolphin).
Phonetic: Yu-rye-npe-del-fiss.
Named By: B. Du Bus - 1867.
Classification: Chordata, Mammalia, Cetacea,
Odontoceti, Eurhinodelphinidae.
Species: E. cocheuteuxi (type), E, longirostris.
Diet: Piscivore/Carnivore.
Size: 2 meters long.
Known locations: Worldwide in oceans across the
Northern hemisphere.
Time period: Miocene.
Fossil representation: Multiple specimens.
Sometimes
confused with the similarly named ichthyosaur
Eurhinosaurus,
Eurhinodelphis was a Miocene era cetacean
that
resembled a long
snouted dolphin. Another similarity to dolphins is the asymmetrical
brain which means one side was different than the other. Additionally
Eurhinodelphis had extremely well developed hearing
and is considered
to have possibly hunted by echolocation.
The
long jaws, particularly the upper which extends beyond the lower has
been interpreted as being the main prey killing adaptation. Like with
sword fish, palaeontologists think that Eurhinodelphis
would have
swum into a shoal of fish and thrashed its long snout about to inflict
injuries upon the fish. Once injured the fish could not swim and move
with the rest of the shoal and became easy prey.
Further reading
- Sur quelques mammiferes du crag d'Anvers. - Bulletins de L'Academie
Royale des Sciences, des Lettres et des Beaux-Arts 24:562-577 - B. Du
Bus - 1867.
- Systematic revision of the Miocene long-snouted dolphin Eurhinodelphis
longirostris Du Bus, 1872. - Bulletin de l'Institut royal des
Sciences
naturelles de Belgique, Sciences de la Terre 74:147-174 - O. Lambert -
2004.
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