Spinoncaea tenuis Böttger-Schnack, 2003, male (northeastern equatorial Pacific) A habitus, dorsal (outer basal seta on left side of P5-bearing somite missing) B urosome, dorsal (P5 and the outer seta of P5-bearing somite on left side missing, caudal seta V on both sides missing) C urosome, ventral, ventrolateral lobes on P5-bearing somite arrowed (P5 and the outer seta of P5-bearing somite on left side missing, caudal seta V on both sides missing) D maxilliped, anterior E antennule F P5 exopod and outer basal seta, lateral G Anal somite and caudal ramus of another specimen, ventral. seta IV on left side and seta V on right side omitted. Scale bars in μm.