1) conulariids
锥石类
1.
,a three sided protoconulariid from the Maidiping Member of the Tongying Formation(Emei County,Sichuan Province,China),is described and compared with four sided Carinachitids and six sided hexangulaconulariids.
本文描述了我国四川峨嵋灯影组麦地坪段原始锥石类中的一个罕见的具有三个柱面的Emeiconulariatrigemmegen。
2) protoconulariids
原始锥石类
1.
of protoconulariids are described from Kuanchuanpu Member of the Dongying Formation near the Sinian-Cambrian boundry of Ningqiang Country, Shaanxi Province.
对陕西宁强宽川铺地区灯影组宽川铺段原始锥石类carinachitids两个新种Emeiconularia amplicanalis sp。
3) acmite
['ækmait]
锥辉石
4) debris cone
倒石锥
5) pumice cone
浮石锥
6) lacroixite
[lə'krwɑ:zait]
锥晶石
补充资料:锥石类
锥石类 Conulata 一类已绝灭的海生无脊椎动物。体锥形,基切面多呈正方形,亦有呈长方形和菱形者,少数呈五边形或三角形,锥面顶角一般小于30°。壳薄,由几丁磷灰质组成。壳表布满横脊或横纹,锥面中线部位可具面中沟或面中脊,壳内在相对位置上可具纵向隔壁。壳口有折叠型口盖,有的类别锥顶可有附着痕。推测锥石类营自由游泳或底栖固着生活。自早寒武世延续至三叠纪,各大洲都有发现。锥石类目前一般认为属腔肠动物门钵水母纲,列为一目,下分2~3亚目及3~5科。 |
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参考词条