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Issue:
fei bo ke ( zhu zuo )(verbeekina) ke de gou zao
Author(s):
Han Nai-ren
,
He Ling-yi and Zhou You-min
Pages:
423
-
426+463-464
Year:
1987
Issue:
4
Journal:
Acta Micropalaeontologica Sinica
Keyword:
拟旋脊
;
隔壁沟
;
立体标本
;
轴切面
;
壳圈
;
列孔
;
茅口组
;
登记号
;
伯克
;
原生质流动
;
Abstract:
本文所研究的费伯克得(竹蜓)标本系采自广西合山下二叠统茅口组的石灰岩,我们在研究其立体标本时发现,由于(竹蜓)壳内圈和外圈的包旋轴有微小的变化,使得至少有一部分拟旋脊延伸方向与前一壳圈上的隔壁沟斜交。拟旋脊常常时隐时现呈虚线状,甚至在列孔两侧的隔壁上并无拟旋脊出现,而只具有列孔,隔壁沟也不是完全平直,壁孔的孔经大约为列孔的十分之一。本文还阐述了Verbeekina的拟旋脊细微构造。
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