Michael Rasser's HOME OF FOSSIL CORALLINE ALGAE:
Davide Bassi's Late Eocene Algae from the Calcare di Nago (Northern Italy)

Sporolithon aschersoni

warty growth forms showing sporangial sori
scale: 500 µm

sporangial sori, overgrown by core filaments
scale: 200 µm

sporangial structures and paraphyses
scale: 50 µm