"Pancala batanica pancala, a land snail with a left-spiraling shell, was formerly only found on the Hengchun Peninsula and in Taitung County. But in 1989 it unexpectedly turned up at Shihtan in Miaoli County." Wu cites a land snail called Leptopoma taivanum, the green mussel (Perna viridis) and a chiton named Acanthopleura spinosa as further specific examples of tropical mollusks whose distribution has advanced northward.
「陸棲貝類中的班卡拉左旋蝸牛，以往只分佈在恆春半島與台東，一九八九年卻在苗栗縣獅潭意外現身，」巫文隆細數，陸生的青山蝸牛、沿海的綠殼菜蛤、海膽石鱉，都是熱帶性貝類分佈向北延伸的實例。