†Spongulus Marcucci & Salvini 1994

Marcucci & Salvini 1994. Early Late Cretaceous radiolarian deposits in the Northern Apennines: biostratigraphy and mineralogical data from the "Scisti Policromi" in the Tuscan succession near Monsummano, Tuscany. Palaeopelagos, 4 1995: 23-34