A 5000-YEAR FOSSIL RECORD OF LARVAL SHELL MORPHOLOGY OF SUBMARINE CAVE MICROSHELLS

Takao Ubukata; Akihisa Kitamura; Mayumi Hiramoto; Tomoki Kase

doi:10.1111/j.1558-5646.2008.00546.x

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Takao Ubukata,^1,2 Akihisa Kitamura,^1,3 Mayumi Hiramoto,^4,5 Tomoki Kase^6,7

¹1Institute of Geosciences, Shizuoka University, 836 Oya, Suruga-ku, Shizuoka 422-8529, Japan
²2E-mail: sbtubuk@ipc.shizuoka.ac.jp
³3E-mail: seakita@ipc.shizuoka.ac.jp
⁴4Toshin Juken Coorporation, 1-3-18 Takamido, Inazawa 492-8628, Japan
⁵5E-mail: mayu-hi-117@ka.tnc.ne.jp
⁶6National Science Museum, 3-23-1, Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan
⁷7E-mail: kase@kahaku.go.jp

Abstract

A 5000-year fossil series of minute submarine cave bivalves was studied using morphometric and evolutionary analyses. The obtained results indicate that the shapes of larval shells of studied species were labile, whereas the size of the larval shell was stable in each species studied. This result is different than that previously reported in most other studies in which size change is more common than shape change. This unique evolutionary pattern of these bivalves might be attributed to their refugial lifestyle.

Citation Download Citation

Takao Ubukata, Akihisa Kitamura, Mayumi Hiramoto, and Tomoki Kase "A 5000-YEAR FOSSIL RECORD OF LARVAL SHELL MORPHOLOGY OF SUBMARINE CAVE MICROSHELLS," Evolution 63(1), 295-300, (1 January 2009). https://doi.org/10.1111/j.1558-5646.2008.00546.x

Received: 9 February 2008; Accepted: 1 September 2008; Published: 1 January 2009