Ok, my turn to vent a bit.
In the middle of last century, there was this scientist named Jovan Hadzi who established his own system with some funky groups you probably never heard of. They are grouped together on characteristics such as number of somites. So you have ameria, polymeria and oligomeria. They no longer hold any water (for decades) but we’re still using it (for teaching purposes). A few more definitions to learn by heart. Why must we learn something that we’ll never ever use? The names (and definitions along with it) are nothing but old relics that need to be buried.
What is the most absurd thing you had to learn in college?
key words: Oligomeria, polymeria, ameria - this is the only place on the net that you’ll read these words as higher taxons. There is a genus of snails named Oligomeria, a genus of flowers called Polymeria from family Malvaceae and Dianthus armeria from Caryophyllaceae. At least that’s what I found with 2 minutes of google.