Figure 19 from: Freitag H, Balke M (2011) Larvae and a new species of Ancyronyx Erichson, 1847 (Insecta, Coleoptera, Elmidae) from Palawan, Philippines, using DNA sequences for the assignment of the developmental stages. ZooKeys 136: 47-82. https://doi.org/10.3897/zookeys.136.1914

Figure 19 - Ancyronyx helgeschneideri Freitag & Jäch, 2007, larva (SEM photographs): A lateral portion of abdominal segment VI with posterolateral trichoid tooth and spiracle, dorsal, B head, dorsal, C head portion with labrum, frontodorsal, D head, frontoventral, E maxillae & labium, ventral, F thoracic segments, ventral, G hindleg, ventral, H portion of abdominal segments, ventral, I abdominal posterolateral projections, ventral, J abdominal segment VIII & IX, dorsal, K abdominal segment IX, ventral, L operculum, ventral.