Diplommatina maduana maduana Laidlaw, 1949
“At first sight very like crosseana, and about the same size, but the last whorl descends and is of about the same diameter as the penultimate. Consequently the labial margin does not approach the suture between the two whorls so closely as it does in crosseana. Its place in this group is provisional.” (Laidlaw, 1949)
Laidlaw (1949) original descriptions on Diplommatina maduana – “Small fusiform shell of about 6½ whorls, not much inflated, descending regularly. Penultimate whorl only slightly wider than the last, and with about 30 fine ribs. Mouth a little angled at the junction of the labial an columellar limbs of the peristome which otherwise is rounded and scarcely expanded.”
Vermeulen (1993) descriptions on Diplommatina maduana maduana – “Shell dextral, fusiform, last two whorls widest; sides convex. Whorls 5-5 5/8, convex. Suture impressed. Constriction level with the parietal side of the peristome, with 1 parietalis, 1 longitudinal palatalis, 1 transversal palatalis, 1 columellaris. Tuba ¾-7/8 whorl. Radial ribs straight, rather distinct, rather low, rather thin, densely placed (7-12 ribs/0.5 mm on the penultimate whorl), often wider spaced on the tuba. Spiral striation inconspicuous. Umbilicus closed. Aperture hardly tilted with regard to the coiling axis; columellaris not or hardly visible. Peristome double, expanding; palatal side not or hardly sinuous, usually with a slight edge; basal side without edge; basal edge not sinuous, rather sharp or slightly protruding; outer peristome (slightly) expanding beyond the inner; inner peristome with a palatal lip, expanding over the shell on the columellar side, little expanding on the parietal side.”
Diplommatina maduana – “Length 1.7 mm. Breadth max. 0.9 mm.” (Laidlaw, 1949); Diplommatina maduana maduana – “Height 1.3-1.7 mm; width 0.7-0.9 mm; index 1.7-2.0. Height and width aperture 0.3-0.4 mm.” (Vermeulen, 1993)
Type locality – “Gua Madu, Kelantan” (Laidlaw, 1949)
Other localities – “Borneo. Sarawak. 1st Div.: small gorge 1 mile S. of Bau” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Doya 2 miles SE of Bau” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Kapur 6 km SE of Bau” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: SE end Bau limestone escarpment” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Jambusan 4 km SE of Bau” (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: Kpg. Beratok along road Kuching-Serian” leg. Auffenberg (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Wah S. of Braang, 23 miles S. of Kuching” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Gayu 23 miles S of Kuching” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: limestone hill 1 mile NE of Penkalan Ampat, 0.5 mile E of Temarang” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Lelat 1 mile SW of Nyabet, 24 miles SSE of Kuching” leg. Wilford (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Mas 0.5 mile W. of Nabet, 24 miles SSE of Kuching” (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: 7.5 km WNW of Kpg. Piching, near Serian” (Vermeulen, 1993); “Borneo. Sarawak. 1st Div.: G. Selabor, W. of Kpg. Lobang Batu, 12.5 km S. of Tebakang” (Vermeulen, 1993); “Borneo. Sarawak. 4th Div.: G. Mulu, lower Tutoh Valley” leg. Wilford (Vermeulen, 1993)
Gua Kapor, Sarawak, Malaysia.