The dragonflies of northern Taiwan are similar to those of East Asia, especially Japan, but the relatives of Potamarcha congener congener and Cratilla lineata assidua of Kenting in southern Taiwan, and of Agrionoptera insignis similis of Orchid Island, live at the subtropical southern tip of the Ryukyu Islands, and in the Philippines.
北部的蜻蜓族譜與東亞日本近似，南部墾丁的溪神蜻蜓、線紋蜻蜓，蘭嶼的八仙蜻蜓，則與亞熱帶琉球南端、菲律賓同一家族。