Oogenesis in Cybister guaerini Anbe (Coleoptera): Studies on the Origin and Composition of Yolk

Abstract

Three categories of compound yolk bodies are formed during oogenesis of Cybister guaerini. The yolk of the first category originates from precursors at cortical ooplasm and is composed of carbohydrate, protein and RNA. The yolk of the second category originates from mitochondria and is composed of protein and RNA. The yolk of the third category develops de novo and contains protein, acid mucopolysaccharide and RNA.