Eutrichosoma mirabile immature stages. A Eggs of Eutrichosoma mirabile (small, stalked) laid on top of the eggs of their weevil host (large, unstalked) within a seed pod of Vachellia constricta; inset: Eutrichosoma mirabile egg B SEM ventrolateral habitus image of a planidium of Eutrichosoma mirabile C planidium attached to host weevil larva D setal map of a Eutrichosoma mirabile planidium, modified from an illustration by Darling & Miller (1991) E head capsule of planidium, dorsal and ventral views F planidium TIII–IV, ventral tubercles G head, anterolateral view, showing the labial structure H TXIII with cerci, dorsolateral view. Abbreviations: ant = antenna, cer = cerci, cs = cranial spine, lp = labial palp, man = mandible, plst = pleurostomal seta, prl = prelabium, psb = pleurostomal bridge, psl = postlabium, set = seta, spi = spiracle, spn = spine, tbs = tubercles, I–XIII = terga numbered from anterior to posterior.