At the time Lu was doing some field surveys, so when he went out he also kept an eye out for the worms. Thus he discovered that tubellaria were to be found from the coastal plain at Kenting right up to a cirque lake 3600 meters high on Mt. Nanhu. But the only way he could get them identified was to send them off to Japan.
當時勤於野外調查的呂光洋，出門就順帶留意，結果發現台灣由平地墾丁到三千六百公呎的南湖大山圈谷水池都有渦蟲，但他只能寄到日本請人鑑定。