He also collected fossils on Cyprus (1930), in England and Scotland (1934), and Estonia (1936). Säve-Söderbergh went on to study the biostratigraphy of the East Greenland Palaeozoic and the problem of skull bone homologies among fishes and tetrapods.
Säve-Söderbergh's fossil collection included sites in Cyprus (1930), England and Scotland (1934), and Estonia (1936). He subsequently delved into the study of East Greenland's Palaeozoic geological history, examining the connections between fish and tetrapod skull anatomy.