Achanthiptera rohrelliformis, pseudocephalon of third-instar larva [SEM]. A anterior end of body, lateral view. B anterior end of body, ventral view. C antennal complex. D maxillary palpus. E facial mask, ventral view. F ventral organ. G spines on first thoracic segment. — Abbreviations: abr, antennal basal ring; an, antennal complex; and, antennal dome; as, anterior spiracle; asb, anterior spinose band; cir, cirri; cl, cleft; ko, Keilin’s organ; ll, labial lobe; lo, labial organ; mh, mouthhook; mp, maxillary palpus; ns1–2, first and second additional sensillum coeloconicum; pc, pseudocephalon; or, oral ridges; sb1–3, sensillum basiconicum 1–3; sc1–3, sensillum coeloconicum 1–3; t1, thoracic segment 1; t2, thoracic segment 2; vo, ventral organ.