Detail
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Class
Gastropoda 
 
Class_C
腹足綱 
Order
Archaeogastropoda 
Order_C
原始腹足目 
Family
Pleurotomariidae 
Family_C
翁戎螺科 
Genus_C
翁戎螺屬 
Scientific Name
Entemnotrochus rumphii
Nomenclator
(Schepman, 1879) 
Chinese Name
龍宮翁戎螺 
Common_C
 
Synonym
urashima Shikama & Oishi, 1977 
Common_E
 
World Distribution
台灣、日本、印尼沿岸
 
Taiwan Distribution
台灣東北角,釣魚台,東沙島東北方 
Habitat
深海 
Character
龍宮翁戒螺出現於古生代寒武紀,距今約五億七千萬年至四億九千萬年前; 繁盛於中生代,而由新生代開始漸趨絕跡。在民國57年開始陸續有漁船在東沙群島、釣魚台、台灣海峽撈獲活體,故可稱之為「活化石」。其主要特徵為殼口有一道裂縫,罅裂達殼底周圍之一半。口蓋比殼口大,殼呈黃色帶火焰色彩,直徑約10-23公分。
 The Entemnotrochus rumphii are supposedly one of the most ancient of the Gastropods, being found as far back as the Cambrian era, about five hundred and seventy million to four hundred ninety million years ago. The most enormous population occurred at Mesozoic Era, and almost disappeared at Cenozoic era. In 1968, fishermen in Taiwan began to catch the living Entemnotrochus rumphii around off-shore islands of Taiwan, like Donshan Islands(Pratas), Diaoyutai Islands, and Taiwan Strait sea area.
Reference
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