I cannot find a single Loricatus Beetle Carapace on any of the Loricatus Beetles in New Trismus, both small and regular. I hunted them for over an hour and got nothing other than trophies, junk items, and thoraxes. This was after completing the quest 'Kerian's Quest: Learn how to technique a claw!', though considering that she gave you the technique 'Adventure: Dragon Breath I' to keep, I assume that it would be craft-able later on as well.
On another note, multiple times during the quest 'Kerian's Quest: Learn to technique a spell!', Agh'kuk Gatherers are still referred to as Sand Pygmies by both Kerian and the text that appears in the chat tab. Also, at one point the chat tab text commands that you hunt the pygmies for their ears, rather than to prove your strength as Kerian's dialogue states. I do have screenshots of these errors if proof is needed.