Two new hadal bivalves of the family Thyasiridae from the plate convergent area of the Japan Trench
Two new hadal bivalves of the family Thyasiridae from the plate convergent area of the Japan Trench
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日本海沟板块汇聚区的两种新的 Thyasiridae 科深渊双壳类
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Kojima Shigeaki
中科院分区：
文献类型：
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作者：
Okutani Takashi;Fujikura Katsunori;Kojima Shigeaki
：Maorith}，as hadalis n. sp.和海南副甲丝孢Parathyasira kaireiae n. sp.（Thyasiridae）。这两个种均采自日本海沟超深海带。前种的特征是壳大，方壳，弯曲弱，后缘短，甚至凹，表面有同心螺纹韧化。后种的特征是喙小，喙形典型，前部略短，弯曲强，目前的发现可能是在异常大的深度出现了thyasirids，这表明与化学合成环境有关。
: Maorith},as hadalis n. sp. and Parathyasira kaireiae n. sp. (Thyasiridae) are described. These species were both cellected from hadal (ultra-abyssal) zone in the Japan Trench. The formcr spccies is churacterized by large quadrate shell with a weak flexure, tmn-cated or even concave posterior margin, and Toughened surface by concentric threads, The lat-ter species is small and typical shape for the genus wirh acutely prosogyrated beak, a slightly shorter anterior portion and a single strong flexurc, The presenr discoveries may be occurrences of thyasirids from unusually great depths suggesting an association with chemosynthetic environment.