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Taxon Pages
Plectostoma kubuensis Liew, Vermeulen, Marzuki & Schilthuizen, 2014
Nomenclature
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Family: DiplommatinidaeSubgenus: Plectostoma
SUMMARY
Apex. Shape: slightly to moderately convex.
Spire. Height: 1.6–2.0 mm. Width: 1.3–1.5 mm. Number of whorls: 3 5/8–4 1/4. Apical spire shape: depressed conical. Basal spire shape: ovoid. Whorl periphery: moderately to distinctly convex. Umbilicus: open or partially closed by tuba.
Constriction. Parietal teeth: none. Basal teeth: none.
Tuba. Coiling direction: type 3 and aperture visible in right lateral view. Tuba whorl length in proportion to spire last whorl: ca. 5/8–3/4. Proportion of tuba that attaches to spire: whole.
Aperture and peristome. Peristome: double peristomes. Outer peristome shape: similar to inner peristome, projected all around, except the posterior part, where the left lateral sides are slightly more projected than the anterior and right lateral side.
Spiral lines. Thick lines: absent. Thin lines: present.
Radial ribs. Rib density: 10–11 ribs per mm. Rib intensity: thin. Shape: straight to slightly curved. Inclination: moderately prosoclin.