The bisexual species Luffia lapidella has a pseudogamic (or gynogenetic) form, which is thelytokous and very similar to the parthenogenetic L. ferchaultella, but its egg needs the stimulation of the sperm. The inseminated egg restores its diploid chromosomal number in performing the same kind of restitutional first meiotic division as ferchaultella does. The second division, although already diploid, is normal and is followed by the formation of two nuclei, one of them degenerating as a polar body. The sperm starts developing as in the normal egg, but by metaphase II, it stops growing to a pronucleus and remains as a contracted and pycnotic body. Although attracted by the central female nucleus, it does not fuse with it. The male centriole behaves normally, it possibly plays a role in the first cleavage mitosis. The egg divides diploid and without any paternal chromosomes.