Popofsky, 1904
Two main diametral spicules 7-8 times longer than other 8. Main spicules thinner in center, gradually thickening distally, ending in 4-bladed arrow head-type structures. Length of main spicules: 0.34 mm, their thickness: 0.0048 mm; length of smaller spicules: 0.05 mm, thickness: 0.001 mm.