ORIGIN OF THE PELECYPOD FAMILY GLYCYMERIDAE
ORIGIN OF THE PELECYPOD FAMILY GLYCYMERIDAE
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盘足类 Glycymeridae 的起源
DOI：
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发表时间：
1950
期刊：
影响因子：
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通讯作者：
D. Nicol
中科院分区：
文献类型：
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作者：
D. Nicol
Glycymeridae可能是在晚侏罗纪时期从一个cucullaeid种群进化而来的。对这两个科的形态特征的研究证明，它们非常相似，特别是当考虑到白垩纪物种时。年代学和地理学证据证实了形态特征所显示的数据。如果只对成熟的标本进行检查，则两个科的铰齿似乎不相关。然而，一个年轻的cucullaeid经历了一个牙齿发育的阶段，就像Glycymeridae一样。
The Glycymeridae evolved from a cucullaeid stock probably during late Jurassic time. A study of the morphologic characters of both families proves that they are remarkably similar, particularly when Cretaceous species are con- sidered. The chronogenetic and geographic evidence confirms the data shown by the morphologic characters. If only mature specimens are examined, the hinge teeth of the two families appear unrelated. A young cucullaeid, however, goes through a stage of tooth development which is like that of the Glycymeridae.