Fig. 3.

MicroCT head scans of Prosoeca sp. displaying the cibarial pump (blue) and the pharyngeal pump with oesopharynx (both green). a, b Lateral and frontal view with cibarial valve, cibarial dilator and cibarial–pharyngeal valve. c, d Frontal and lateral view with pharyngeal dilator and compressor muscles together with oesopharyngeal dilators. e, f Cibarial protractor and retractor attached to a dorsolateral cuticular ledge on the cibarium. Cb cibarium, cpv cibarial–pharyngeal valve, mcc musculus clypeo-cibarialis, mcpd m. clypeo-pharyngealis dorsalis, mcpv m. clypeo-pharyngealis ventralis, mfc musculus fronto-cibarialis, mfp m. fronto-pharyngealis, mgc m. geno-cibarialis, mlc m. labro-cibarialis, mtod m. tentorio-oesopharyngealis dorsalis, mtol m. tentorio-oesopharyngealis lateralis, oe oesopharynx, ph pharynx