Welcome back Arthro-Poders! Today we chat with Louis Nastasi about gall wasps. Louis recently defended his PhD dissertation at Penn State, which focused on the herb gall wasps (Cynipidae: Aulacideini), especially species of Antistrophus on Silphium. A number of the chapters have already been published, including a catalogue of North American herb gall wasps, key to herb gall wasps and their inquilines, and a revision of the Antistrophus rufus species complex. We start with an introduction to galls and gall wasps, then talk about some of the specifics of his work.   Show Notes You can find show notes on the blog.   Get the show through Apple Podcast, Spotify, or your favorite podcatching app! If you can spare a moment, we appreciate when you subscribe to the show on those apps or when you take time to leave a review!   Older episodes can be accessed through Archive.org.