On megaspores, Charophyta fruits and some other small fossils from the Cretaceous

Abstract

Megaspores found in boring IJsselmonde, I, the Netherlands, have been compared with the spore content of some other borings in the Netherlands and of boring Kingscleke, Great Britain, which are Wealden in age. Convincingly it could be proved that the samples studied from boring IJsselmonde must belong to the Wealden. Some new specimens were noticed, of which Triletes gryensis has been found by Dr. Gry in the Lower Wealden from Bornholm, Denmark, by which fact the age of boring IJsselmonde, I, may belong to the Lower Wealden. Moreover, a number of non-calcified Charophyte fruits have been found in that boring. Some new records of borings in Belgium, the Netherlands and Egypt have been mentioned. The most interesting result may be that Pyrobolospora lobata does not only occur in the Senonian, but also in the Palaeocene, whereas its horizontal spreading is also very wide (from W. Europe to Egypt). Finally, this spore is closely related, probably identical with Rodeites dakshini from India.