A comparison of morphological adaptations in the cardiid bivalves Cardium and Budmania
A comparison of morphological adaptations in the cardiid bivalves Cardium and Budmania
复制标题
心形双壳类 Cardium 和 Budmania 形态适应的比较
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Jenny Sälgeback
中科院分区：
文献类型：
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作者：
E. Savazzi;Jenny Sälgeback
摘要对新近纪的布马尼亚虫与新近纪的Cardiinae，特别是Cardium costatum Linnaeus进行了比较，结果表明，它们在相对较低的壳厚度、明显的内部中空龙骨和整体壳几何形状方面具有相似性。然而，Budmania缺乏二次壳再吸收和相关功能中发现Cardinae，和推理分析的适应意义的壳形态揭示了两个类群之间的进一步差异。特别是C.中肋骨的优化双重功能，作为机械加强和作为锚在沉积物中，但只有后者的功能在Budmania。
Abstract A comparison of the Neogene lymnocardiine Budmania with Neogene to Recent Cardiinae, and especially Cardium costatum Linnaeus, shows homoplasy in the relatively low shell thickness, presence of conspicuous, internally hollow keels and overall shell geometry. However, Budmania lacks the secondary shell resorption and associated features found in Cardiinae, and an inferential analysis of the adaptive significance of shell morphology reveals further differences between the two taxa. In particular, the keels in C. costatum are optimised for a dual function as mechanical strengthening and as anchors within the sediment, but only for the latter function in Budmania.