Ancyronyx sarawacensis A–F, H final instar larvae from the type locality, SEM micrographs and cleared microscopic slide mounts, G everted endophallus: A meso- and metathorax with legs, ventral view B right middle leg, detail, ventral view C detail of twin setae on tibiotarsus, ventral view D detail of pilose setae on femur, ventral view E detail of twin setae on pleurite VI, ventral view F terminal abdominal segment, ventral view G extruded endophallus, dorsolateral view. Abbreviations: Ds: dorsal sac-supporting sclerite, Vb: ventral bladder, Db: dorsal bladder, DpE: distal portion of endophallus, As: apical sclerite (according to Hayashi and Yoshitomi 2015).

  Part of: Kodada J, Jäch MA, Freitag H, Čiamporová-Zaťovičová Z, Goffová K, Selnekovič D, Čiampor Jr F (2020) Ancyronyx clisteri, a new spider riffle beetle species from Borneo, redescription of A. sarawacensis Jäch including a description of the larva and new distribution data for A. procerus Jäch using DNA barcodes (Coleoptera, Elmidae). ZooKeys 912: 25-64.