Summary table for the three Australian species of Ammatomus, along with copies of the original species descriptions.

The Bembicini genera Argogorytes and Austrogorytes are superficially similar. Here's a definitive comparison for two WA species that I have previously struggled to differentiate from written descriptions alone.
(cover image: Kerry Stuart, iNaturalist sighting
https://inaturalist.ala.org.au/observations/235308189

Identification notes based on collected specimen

Identification notes based on collected specimen
[cover image a different individual: imaged nearby, 16/11/22]