Conotubus Zhang et Lin, 1986

Emended diagnosis: Straight or sinuous conotubular tube preserved with a closed apex and an open aperture. Tube demarcated into a series of sections by constriction, abrupt bending, or change in orientation. Tube wall does not appear to be biomineralized, and it consists of nested funnel-shaped cylinders that are successively added at the apertural end. Tube does not branch or split. Tube length 3–80 mm, aperture diameter 0.3–12 mm, and apex diameter 0.1–4 mm.