Data Sheet 1_Building the parasitic wasp Encarsia: a tale of three tails.pdf

Early development follows a predominantly peripheral cleavage pattern but is characterized by the precocious segregation of an apical blastomere at the eight-nuclei stage. Subsequently, a large portion of the blastoderm differentiate, giving rise to an extra-embryonic membrane that, together with the apical lineage, surrounds the embryo and later dissociates into numerous teratocytes. Comparative analysis reveals that E. lutea displays a combination of traits observed in two congeneric species, Encarsia formosa and Encarsia pergandiella, but follows a distinct developmental trajectory.

In particular, the origin and formation of the EEM differ markedly among species, highlighting alternative solutions to similar functional constraints. These findings provide further evidence that early embryogenesis in parasitoid wasps is evolutionarily labile, even at low taxonomic levels, and suggest that developmental diversification within the genus Encarsia is shaped by a complex interplay between nutritional strategies, life history, and genetic flexibility.</p>