Pericharax peziza Dendy, 1913

Dendy (1913: 15) described this from Cargados Carajos as a species similar in spiculation to P. orientalis (as P. heteroraphis), but with a cup-shaped form, size 3.7 cm diameter and a height of the cup of 2.9 cm. The cup walls are 0.7 cm in thickness and are smooth, unfurrowed. Burton (1963) synonymized the two, but Van Soest & De Voogd (2015) considered it a separate species, following Dendy’s decision. The inside of the cup has numerous oscular openings. The giant triactines have actines of 1400 x 70 µm, small choanosomal triactines have actines of 180 x 5 µm, cortical triactines are 100 x 5.5 µm, tetractines of the surfaces of the inner wall and canals up to 290 x 12 µm, apical actines slightly crooked, up to 75 µm.