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Longitudinal sections of Thaumatophyllum bipinnatifidum ovules showing early developmental stages of Arastichus gallicola. (a,b) Position of the wasp egg (arrows) relative to the ovule; (c–f) position of the first-instar larva (arrow) relative to the ovule; (e) detail of the larva near elements of the ovule funicle; (f) close-up of the larva. Abbreviations: end = endothelium, es = embryo sac, fun = funicle, it = inner integument, l = larva, loc = ovarian locule, nu = nucellus.
