Heterochromatinization of paternal haploid set of chromosomes in the male embryonal cells of Nipaeococcus delassusi (Balachowsky, 1925) (Coccinea: Pseudococcidae), K 1276, Morocco (vicinity of Tangier); 2n = 12, heterochromatinized chromosomal sets are arrowed. Scale bar: 10 µm.