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单词 proloculus
释义 proloculus Zool.|prəʊˈlɒkjʊləs|
Also erron. proloculum.
[f. pro-2 1 + loculus.]
In Foraminifera, the first chamber formed by the zygote.
1928J. A. Cushman Foraminifera ii. 12 The initial chamber in the foraminifera is known as the proloculum.1935Twenhofel & Shrock Invertebr. Paleontol. ii. 36 The zygote secretes a small shell around itself, the proloculum of the microspheric shell.1952R. C. Moore et al. Invertebr. Fossils ii. 40/2 The size of the proloculus of megalospheric forms varies considerably in certain species.1975Nature 18 Sept. 208/2 In random thin sections these seem to arise from a cluster of small chambers or from a large initial chamber which may be the proloculus.
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