Fig. 22 in Fossil freshwater sponges: Taxonomy, geographic distribution, and critical review

Fig. 22. Spicular remains of Spongillidae. Miocene, Lacustrine deposit at Oviatt Creek, northern Idaho, USA. Megascleres (A–F, S, W–AB), microscleres (L–N), and gemmuloscleres (G–K, P–V), ascribed originally to several genera: Anheteromeyenia, Corvospongilla, Eunapius, Radiospongilla, Spongilla, Trochospongilla; X, originally enlarged × 1200, AB, originally enlarged × 700. O. Axial canal of a broken spicule, originally enlarged × 5300. G, O, P, SEM images. Modified from Williams (1985).