Robison, W.G. 1990 1.2.3.2 Sperm ultrastructure, behaviour, and evolution.. Armored Scale Insects, Their Biology, Natural Enemies and Control [Series title: World Crop Pests, Vol. 4A]. Elsevier Amsterdam, the Netherlands 384 pp.

Notes: Abstract: Unique sperm features include filamentous structure with no distinct head, middle-piece or tail, and lack of important cell organelles such as acrosome, centrioles or mitochondria; 25 spp. mentioned. Keywords: anatomy; cytology.