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A new species of Arca (Bivalvia : Arcidae) from Taiwan

台灣產的魁蛤一新種(雙殼綱:魁蛤科)

摘要


A new species of Arcidae is described and named as Arca taiwanensis. This new species is discovered from the shallow seas of eastern Taiwan. The unique features of the new species include: (1) Shell is small. (2) Shell is flat and subtriangular in side view. (3) Shell is very inflated and ovate in dorsal view. (4) It seems that it lacks umbo. (5) Shell outer surface is poor in sculpture. (6) Digamental area is very wide. (7) Byssal gape is wide and elongated. The holotype is deposited in National Taiwan Museum in Taipei. Some Taiwanese species of genus Arca are illustrated for comparison.

關鍵字

New species Bivalvia Arcidae Arca Taiwan

並列摘要


大約三十年前,我們在台灣東部淺海域採集到一些不知名的魁蛤標本,附著於珊瑚礁塊上,但無法鑑定其種名。這種魁蛤比較小型而且形態獨特,最近經作者研究,可能是魁蛤科的新種,今以本文描述之。本新種貝殼將被命名為台灣魁蛤(Arca taiwanensis),以紀念其產地。大多數的Arca屬魁蛤貝殼都比較大型和修長,但此新種魁蛤比較小型,殼長約16-18 mm,而且形態獨特,沒有殼頂,殼表缺乏雕刻,足絲孔甚大,正模式標本保存於台北市的國立台灣博物館。

並列關鍵字

雙殼類 魁蛤科 新種 台灣

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