Fig. 4

Scanning electron micrographs of ‘Diphyllobothrium’ sprakeri n. sp. from Zalophus californianus, California, USA. a Capilliform filitriches on the lateral scolex surface. b Coniform spinitriches on the dorsoventral scolex surface. c–e Scoleces, dorsoventral view. f Scolex in apical view. g Ventral surface of gravid proglottids showing numerous papillae surrounding the genital atrium. h–i Eggs and surface of egg shell. j Detail of egg surface with pits