Tudge, C.C., Scheltinga, D.M. and
1999c. Spermatozoal ultrastructure in the Hippoidea (Anomura,
Decapoda). Journal of Submicroscopic Cytology and Pathology 31, 1-13.
Three species of anomuran mole and sand
crabs (Albunea sp., Emerita talpoida and Hippo pacifica) in the
Hippoidea are investigated for spermatozoal ultrastructure. Each
species has a
different spermatozoal morphology but shares, with the others, three
apomorphies - a thickened, multi-layered operculum, a perforatorial
a central acrosome zone. The spermatozoa of A. sp. (family Albuneidae)
numerous perforatorial spikes which emanate from the anterior of the
perforatorium and contain electron-dense tubes of longitudinally
granules. These densely filled perforatorial spikes are not found in
species, E. talpoida and H. pacifica, from the family Hippidae.
of E. talpoida are distinct in
having an elongate acrosome vesicle, a
chambered perforatorium and a conical operculum. All three taxa share
significant spermatozoal characters which unite them, but their
to other investigated anomuran crabs is still unknown.