|
Fig. 12
|
Photomontage
of Cerithium columna (Cerithiidae) Testis, showing cohort of paraspermatids
(P) adjacent to euspermatids (E). Paraspermatids have an acrosome like
structure (A), permanent tail brush (arrowhead), as well as nuclear remnant
(N). Scale bar = 2 m m. |
|
Fig. 13
|
Developing
lancet (L) and carrier (C) paraspermatocytes of Fusitriton oregonensis
are readily distinguished from euspermatocytes by pattern of chromatin
and invagination of nucleus. Scale bar = 2m m. |
|
Fig. 14
|
Paraspermatid
of Nodilittorina picta showing glycoprotein bodies (GB) and exocytotic
granular vesicle (GV) characteristic of caenogastropod parasperm. Scale
bar = 4 m m. |
|
Fig. 15
|
Parasperm
of Strombus gibberulus showing large glycoprotein bodies (GB) and
portions of undulating membrane (M) that contains various axonemes. Scale
bar = 4 m m. |
|
Fig. 16
|
Photomontage
of parasperm and eusperm of Fusitriton oregonensis. Carrier (C)
parasperm shown in longitudinal and cross sections, transports a cohort
of fertile eusperm (E) forming a 'spermatozeugma'. Adjacent lancet (L)
parasperm are independent. Carrier has a central core of axonemes (Ax),
whereas in lancet, axonemes are peripheral (large arrows). Carrier contains
large glycoprotein bodies (GB) and produces different exocytotic secretions
compared to lancet, which contains many small glycoprotein bodies and numerous
clear vesicles. Scale bar = 2m m |