Endemism at the generic level includes the palms "Howea", "Hedyscepe" and "Lepidorrhachis", a woody daisy "Lordhowea", the tree "Negria", the leech "Quantenobdella howensis", three annelid worm genera ("Paraplutellus", "Pericryptodrilus" and "Eastoniella"), an isopod shrimp "Stigmops", a hemipteran bug "Howeria", and a cricket "Howeta".