Haeckel, 1887
Two main spicules compressed, lanceolate, two-edged, tapering from broader middle towards two ends; apex simple, base a small pyramid, without leaf-cross. Eighteen smaller spicules sword-shaped, only two thirds or one half as long, and one third or one half as broad, each with two opposite teeth in distal part. Central capsule ellipsoidal. Length of 2 major spicules 0.13 mm; breadth 0.2 mm; length of the 18 secondary spicules 0.1 mm.