A New Species of the Genus <i>Lanceolaria</i> (Bivalvia: Unionidae) from Japan

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  • 日本産ササノハガイ属（二枚貝綱：イシガイ科）の1新種
  • A New Species of the Genus Lanceolaria (Bivalvia: Unionidae) from Japan

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Abstract

<p>A new unionid species Lanceolaria kihirai n. sp. is described from the Futatsukawa Creek, Yanagawa City, Fukuoka Prefecture and the Matsuura River, Karatsu City, Saga Prefecture, Kyushu, Japan. L. kihirai n. sp. differs from L. triformis and L. lanceolata in having a non-twisted shell, and from L. oxyrhyncha and L. grayii in having a round posterior ridge. Moreover, the posterior ridge is prominent from beak to the posterior end in L. oxyrhyncha, L. grayii, L. gladiola and L. acrorrhyncha, while gradually becoming obscure toward the posterior end in L. kihirai n. sp.</p>

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