Morphological characteristics of four different types of Fridericia bulboides. For indexes 1a–3d each numeral indicates a specific organ (1 sperm funnel 2 male gland (only outline shown) 3 end of spermathecal ectal duct and spermathecal ectal gland), letter corresponds to morphological type (a “classical” F. bulboides b F. bulboides with large spermathecal ectal gland c F. bulboides with big floppy sperm funnels, large male bulbs and compact glandular field near spermathecal ectal gland d F. bulboides with medium-sized male bulbs and compact glandular field near spermathecal ectal gland) 4 coelomocytes of F. bulboides with refractile vesicles at coelomo-mucocyte periphery (types a, b) 5 coelomocytes of F. bulboides without refractile vesicles at coelomo-mucocyte periphery (types c, d).