Phaedusa filicostata tenuicosta (Nevill, 1878)
Size:
Phaedusa filicostata tenuicosta from Tambun, Perak– “Shell: length 19.8-22.0, diam. 4.3-4.4, Aperture: height 4.2-4.6, width 3.4-3.7, number of whorls 11 ½-13.” (Loosjes, 1963); Phaedusa filicostata tenuicosta from Mount Kaki, Perlis – “Shell: length 24.2, diam. 4.4-4.6, Aperture: height 4.9-5.1, width 3.9-4.0, number of whorls 13.” (Loosjes, 1963)
Habitat:
Other localities – “Perak: hill near the hot springs, about 400 m off the highway Tanjong Rambutan-Ipoh, near Kota Tambun, on the ground under leaves.” Leg. J. Drijver/1946 (Loosjes, 1963); “Perlis: Mount Kaki” (Loosjes, 1963)