Caulibugula exilis is recorded from Australia, New Guinea, and the Solomon Islands.
Original description: Stirparia exilis MacGillivray, 1890.
Locality: Port Phillip Heads, Victoria, Australia.
Lectotype: BMNH 1897.5.1.347-349; Paralectotypes: NMV 45558 (part), 63471, 63472.
Description from Tilbrook, 2006. (PDF file)