Genus Laeosopis Rambur

(Fig. 4 A, B)

The single species of the genus, Laeosopis roboris (Esper), has an egg with a characteristic volcano profile, with the annular area elevated and the rest sunken, with the equator occupying a basal position. The micropyle is found within a circular depression, surrounded by tiny rounded cells and a crown of grooves. The transition zone has thick walls, a character shared with T. betulae . The tubercle-aeropyle zone is made up of rounded regularly shaped cells, surrounded by elevated walls with prominent, blunt corners (Verhulst 1986).