In Ascaris the sperm cells donot have a tail..so how is their movement governed ?

Question

In Ascaris the sperm cells donot have a tail..so how is their movement governed and how do they decide the mobilty as distal centriole is absent??

Answer 1

They do so by throwing small pseudopodia. In other words, their movement may be called amoeboid.

Answer 2

Sperm of the nematode, Ascaris suum, crawl using
lamellipodial protrusion, adhesion and retraction, a
process analogous to the amoeboid motility of other
eukaryotic cells. However, rather than employing an actin
cytoskeleton to generate locomotion, nematode sperm use
the major sperm protein (MSP). Moreover, nematode
sperm lack detectable molecular motors or the battery of
actin-binding proteins that characterize actin-based
motility.