Birch trees. Russia
Moreover, the existing ones Due to the short time of isolation, the forms have probably not yet developed very divergingly. Indeed, we find such a correspondence that there is nothing better to wish for. So, in the Eocene we find almost everything suborders mammals in North America and also in Europe.
Similar distribution features are characteristic of other classes of animals.
The boundaries of the spread of continental ice in the Quaternary period. For the time before the complete separation of North America from Europe. According to A. Wegener.
A young family of earthworms (Lumbricidae) is distributed from Japan to Spain, and on the other side of the ocean – only in the eastern United States. Barley is found on the edges of the former contact of the continents in Ireland and Newfoundland and in areas adjacent to these islands on both sides. The percidae family and other freshwater fish are found in Europe and Asia, and in North America only in the eastern part.
Pearl Oyster Newfoundland
Pearl Oyster of Europe
Calluna uulgaris Newfoundland
Calluna uulgaris of Europe
Probably, one should also call the common heather (Calluna uulgaris), which is found in addition to Europe only on the island of Newfoundland and in the areas bordering it.
On the other hand, the distribution of a significant number of American plants is limited in Europe to the western part of Ireland. Although it is possible that the latter can be explained by the influence of the Gulf Stream; with regard to heather, such an explanation cannot be accepted. Especially noteworthy is the spread of field slugs from southern Germany through the British Isles, Iceland and Greenland all the way to the American side, where it, however, is found only on Labrador, Newfoundland.
