This paper presents the first full morphological description of Macron
europteris macrophylla, the type species of its genus. The fronds are
very similar in size to the more widely distributed Neuropteris, but a
re significantly less divided; the M. macrophylla pinnules are homolog
ous to segmented, tertiary pinnae in Neuropteris. M. macrophylla is kn
own only from westernmost Europe and easternmost North America.