Aspidosiphon (Paraspidosiphon) fischeri ten Broeke, 1925  

This species has a distinct anal shield composed of angled-plates regularly arranged, without furrows or grooves. Caudal shield is not well defined. Introvert up to two times the trunk length. The ill-defined muscles bands are visible through the trunk wall. Bidentate and unidentate hooks are present in rings. Compressed bidentate hooks arranged in rings; unidentate hooks may be present among the bidentates on the proximal rings. Scattered pyramidal hooks are present behind compressed hooks.