Pseudochitinopoma

Key to Pseudochitinopoma species

1. Tube with regularly spaced transverse ridges................................................................ 2

- Tube without regularly spaced transverse ridges, with longitudinal keel........................................... 3

2. Tube transverse ridges sharp straight, no longitudinal keel. Operculum topped with flat to slightly convex end-cap topping elongated opercular bulb.............................................................. P. amirantensis sp. nov.

- Tube transverse ridges rounded, alternating with longitudinally keeled parts. Operculum with elongated chitinous end-cap hav- ing numerous transverse striations...................................................... P. beneliahuae sp. nov.

3. Operculum with slightly convex to slightly conical end-cap; collar high................................ P. occidentalis

- Operculum with distinctly elongated end-cap; collar low...................................................... 4

4. Operculum with elongated conical chitinous end-cap bearing whitish granules, without striations........... P. pavimentata

- Operculum with elongated conical chitinous end-cap bearing longitudinal striations, no whitish granules........ P. capensis