EVOLUTION OF DEEP-SEA PROTOBRANCH BIVALVES
EVOLUTION OF DEEP-SEA PROTOBRANCH BIVALVES
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DOI：
10.1098/rstb.1978.0076
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发表时间：
1978-01-01
期刊：
影响因子：
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通讯作者：
ALLEN, JA
中科院分区：
文献类型：
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作者：
ALLEN, JA
世界大陆架上的原鳃类物种数量占双壳类物种总数的10%至15%。这与深海的双壳类动物群形成对照，深海的双壳类动物群远离较低的大陆坡，以原鳃类为主。原鳃类可包括样品中超过70%的双壳类物种和超过95%的存在的双壳类样本总数。原鳃亚纲有着最长的地质历史记录，其持续的成功，特别是在深海，可能是由于一套生理特征，使其能够在相当深的深度和压力下利用低和难处理的食物供应。可能是由于缺乏来自较新起源的双壳类的竞争以及它们的环境长期稳定的结果，深海双壳类显示出与大陆架上较新进化的板鳃类相似的形式和习性的辐射。深海双壳类动物群的研究有助于了解晚寒武世和早奥陶世贝类的演化和生态。
The number of protobranch species of the continental shelves of the world comprise between 10 and 15 % of the total number of bivalve species present. This is in contrast to the bivalve fauna of the deep sea which, distant from the lower continental slopes, is dominated by the protobranchs. The protobranchs may comprise more than 70% of the bivalve species in a sample and more than 95 % of the total number of bivalve specimens present. The Subclass Protobranchia has one of the longest recorded geological histories and its continuing success, particularly in the deep sea, is probably due to a suite of physiological characters that enable it to utilize a low and refractory food supply at considerable depths and pressures. Probably as a result of the lack of competition from bivalves of more recent origin as well as the long stability of their environment, the deep sea bivalves show a radiation of form and habit that is analogous to that shown by the more recently evolved lamellibranchs of the continental shelf. The study of the bivalve fauna of the deep sea helps in the understanding of the evolution and ecology of the Mollusca of late Cambrian and early Ordovician periods.