地瓜上的蝸牛: 白色的曾文型台灣煙管蝸牛

曾文型台灣煙管蝸牛是1987年由張寬敏及巫文隆所發表的一種台灣煙管蝸牛新變異型(new form)，作者以深紫色外殼及稍為粗短的外殼認定是一種新變異型。

根據第四版的國際動物命名公約(International Code of Zoological Nomenclature)的15.2條規定1960年之後創建的變異、型將被排除在規約之外，原文如下：

Nemes published afer 1960 with the term "variety" or"form" excluded. A new name published afer 1960 expressly as the name of a " variety" or "form" is deemed to be infrasubspecific and as such is not regulated by the Code [Art. 1.1.1] and is excluded from its provisions [Art. 1.3.4, 45.6.3]

另外相關重要條文45.6.3原文：it is deemed to be infrasubspecific if it was first published after 1960 and the author expressly used one of the terms "variety" or "form" (including use of the terms "var.", "forma", "v." and "f".);

現在先不管曾文型台灣煙管蝸牛適法性的問題，這枚於曾文型台灣煙管蝸牛模式產地發現的白色個體，再次證明我的理論─台灣煙管蝸牛不論在外型及顏色都有極大的變異，不應建立許多亞種。