瓶筐石类的硬体构造及生物属性  

THE SKELETON STRUCTURE OF CALATHIIDS AND ITS BIOLOGICAL ATTRIBUTE

作　　者：刘秉理[1] 朱忠德[1] 姜衍文[1] 

机构地区：[1]江汉石油学院

出　　处：《石油与天然气地质》1996年第4期337-342,共6页Oil & Gas Geology

基　　金：国家自然科学基金

摘　　要：鄂西下奥陶统分乡组和红花园组产大量的Ｃａｌａｔｈｉｕｍ化石，因其具有下列特征：（１）以锥状或角状、杯状为特征，生长方向为锥端朝下，开口端朝上；（２）具多孔的双层体壁及其间的环形壁间腔；（３）不存在中轴，而具有一开阔的中央腔，其功能大约相当于出水孔；（４）多具发达的根状或瘤状壁外构造，功能为锚固、缠绕或平衡。表明应是一种较低级的滤食性动物，可能与古杯动物有一定亲缘关系，不应将其归属藻类。A large number of Calathium specimens were collected from west Hubei. They are characterized by: 1. The organism is in the shapes of inverted cone, born or cup with the opensides upward and the closed tips anchored on the sea bed; 2. Porous double-wall and ring-likeintervallum of the organism constitutes a water circulatory system similar to that of Archaeocyathids and sponge; 3. The organism has no axis but has a broad central cavity which actsprobably as a cloacal 4. Most specimens possess foot-like or tumour-like outgrowth structures with anchoring,twining or balanching function. All these features indicate that the organism should be a kind of lower class animal of filter feeder with certain affinity to Archaeocyathids but should not be classified into algae.

关 键 词：瓶筐石类 硬体构造 生物属性 地层 岩石 

分 类 号：P583[天文地球—岩石学]