瓶筐石类的硬体构造及生物属性

THE SKELETON STRUCTURE OF CALATHIIDS AND ITS BIOLOGICAL ATTRIBUTE

刘秉理 朱忠德 姜衍文

Liu Bingli Zhu Zhongde Jiang Yanwen

鄂西下奥陶统分乡组和红花园组产大量的化石,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 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.

10.11743/ogg19960414