(Haeckel, 1860)
Main spicules 4-winged, of equal length. Secondary spicules 1/2 to 2/3 as long as main, 4-winged. All spicules broaden near base, tapering distally, with 20 myonemes. Central capsule ellipsoidal, compressed, opaque, yellow to dark brown. Length of main spicules: 0.12-0.2 mm, width: 0.013-0.025 mm; secondary, length: 0.06-0.15 mm, width: 0.08-0.016 mm; central capsule, major axis: 0.1-0.15 mm, minor axis: 0.08-0.1 mm.