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(Haeckel, 1887)

Posterior main spicule usually slightly longer than anterior, both 4-bladed in cross section, with sharp tips. All secondary spicules of similar length, cylindrical, wide at base, tips sharp. Length of main spicules: 0.16-0.20 mm, width: 0.012-0.014 mm; secondary, length: 0.10-0.14 mm, width: 0.005 mm.

Amphibelone hydrotomica