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早白垩世地中海海域内,分布着一个大型的、引人注目的腕足类化石Peregrinellamulticarinata(Lamarck),阿格(Ager,1964,1973)曾把它和三叠纪的Halorella比较,同称为“昙花一现的化石”。认为它们具有广泛、断续的地理分布,在地史上忽然出现,突然消失,既不了解它的祖先,又未见其后代。这种现象决不能单纯用“相化石”解释,而是和生命环境的瞬息改变相联系。据现有文献记载,Peregrinella动物群最早记录
In the Early Cretaceous Mediterranean Sea, a large and striking brachiopod fossil, Peregrinellamulticarinata (Lamarck), was distributed. Ager (1964, 1973) compared it with Triassic Halorella, and is called “Ephemeral Fossil ”. They think that they have a wide and intermittent geographical distribution, suddenly appear in the history of the earth, suddenly disappear, neither understand its ancestors nor see its offspring. This phenomenon can never be explained solely by “fossil facies,” but rather by a transient change in the life environment. According to the existing literature, Peregrinella fauna was first recorded