KEY TO IPHIONE SPECIES KINBERG, 1856 RECORDED IN HAWAII (MODIFIED AFTER PETTIBONE 1986)

1 Elytra with lateral fringe of papillae ............................................................................................................. 2

— Elytra without lateral fringe of papillae; elytral macrotubercles spine-like, arranged in 3-8 concentric rows, neurochaetae unidentate .............................................................................................. I. ovata Kinberg, 1856

2(1)Elytral macrotubercles spine-like, arranged in 4-5 concentric rows; neurochaetae unidentate ......................... .......................................................................................................... I. muricata (Savigny in Lamarck, 1818)

— Elytral macrotubercles projected as blunt lobes, or low conical or cushion-like lobes ................................... 3

3(2)Neurochaetae unidentate ............................................................................................................................. 4

— Neurochaetae bidentate; macrotubercles low ridges, arranged in 3-4 concentric rows ..................................... ................................................................................................................... I. coriolis? Hanley & Burke, 1991

4(3)Macrotubercles projected as blunt lobes, arranged in a single series, without long spines; marginal fringe with papillae short (up to twice longer than wide) ...................................................... I. treadwelli Pettibone, 1986

— Macrotubercle low ridges with 2-4 long blunt spines, arranged in up to 10 concentric rows; marginal fringe with papillae long (3-5 times longer than wide) ................................................... I. henshawi Pettibone, 1986