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con successive revisioni sistematiche, l’orca venne attribuita al genere grampus, proponendo il nome di grampus rectipinna per gli esemplari con pinna dorsale più sviluppata, ma oggi i biologi marini ed i tassonomisti indicano un’unica specie d’orca, l’ orcinus orca, suddivisa forse in diverse razze o sottospecie.
with successive systematic revisions, the orca was ascribed to the genus grampus, proposing the name of grampus rectipinna for the specimens having the dorsal fin more developed, but nowadays the marine biologists and the taxonomists indicate one only species, the orcinus orca, perhaps subdivided in different races or subspecies.