安徽贵池—青阳地区红花园组Calathium化石

<正> 笔者在安徽贵池—青阳—带下奥陶统红花园组发现扬子地台红花园组的常见化石Calathium(中译名称瓶筐石),其分类位置存在争议:一种归于海绵动物,一种归于藻类,另一种认为与古杯类、串管海绵类一起归于Archaeata低等多细胞生物)。贵池—青阳地区的Calathium化石采自贵池桃坡老屋里和青阳五溪马家岭红花园组,种类虽不

Calathium from the Honghuayuan Formation in the Guichi-Qingyang area, Anhui

A great number of specimens of Calathium were collected from the upper part of the Honghuayuan Formation in the Guichi-Qingyang area of Anhui.They are associated with nautiloid cephalopods Coreanoceras and Hopeiceras, brachiopods Tritoichia and Paurothis, gastropod Lesueurilla, sponge Arachaeoscyphia, echinoderm Cyclocyclicus, alga Nuia and cono-donts.The beds containing Calathium are assigned to the upper subzone of the Serratogna-thus 'divenus Zone and correspond to the Didymograptus filiformis Zone.Available data indicate that Calathium was one of the chief reef-building organisms during the Lower Paleozoic and had built a lot of reefs or organic builtups in many places of the world such as Kaili and Duyun of Guizhou, SW Hubei, Taxas and Oklahoma, indicating a tropical or subtropical environment with normal sdalinity and rich food.It is suggested that during that time the Guichi-Qingyang area was just being situated on the southeastern edge of the Yangtze platform.