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Haeckel, 1887

Spicules in distal half four-sided prismatic, thin, with pyramidal apex; in basal half much broader, four-winged, with large leaf-cross at base. From four wings of basal half variable number of slender teeth or triangular apophyses, commonly sixteen to twenty-four, often irregular (four to six from each wing). Length of spicules: 0.3 to 0.4 mm, breadth in distal part: 0.007 to 0.01 mm, in basal part: 0.02 to 0.03 mm.

Pristacantha polyodon