Plectostoma panhai (Liew, Thor-Seng, Vermeulen, Jaap Jan, Marzuki, Mohammad Effendi bin & Schilthuizen, Menno 2014)
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- Plectostoma panhai Liew, Thor-Seng, 2014, ZooKeys 393: 35-36.
Description. Apex. Shape: moderately convex. Spire. Height: 2.1-2.2 mm. Width: 1.6-1.7 mm. Number of whorls: 4 1/2-4 5/8. Apical spire shape: depressed conical. Basal spire shape: ovoid. Whorl periphery: moderately convex. Umbilicus: open. Constriction. Parietal teeth: one. Basal teeth: none. Tuba. Coiling direction: type 1 and aperture visible from back view. Tuba whorl length in proportion to spire last whorl: ca. 3/4. Proportion of tuba that attaches to spire: whole. Aperture and peristome. Peristome: double peristomes. Outer peristome shape: same as inner peristome and uniformly projected all around, except the posterior part. Spiral lines. Thick lines: present. Thin lines: present. Radial ribs. Rib density: 8-9 ribs per mm. Rib intensity: thin. Shape: straight. Inclination: orthoclin.
Distribution. Type locality. Tham Krachaeng, Thailand (6°12'50"N, 101°12'9"E). The location description in the original publication is not completely correct "(06°55'022"N, 101°12'160"E)" (Maassen 2001). Distribution range. This species is only known from the type locality (Figure 18D).
Discussion. See discussion under Plectostoma christae.