The terrestrial microsnail genus Aulacospira Moellendorff, 1890 (Eupulmonata, Stylommatophora, Hypselostomatidae) in Thailand with key to Thai species Author Dumrongrojwattana, Pongrat Department of Biology, Faculty of Science, Burapha University, Bangsaen, Chonburi 20131 Thailand https://orcid.org/0000-0002-2544-6979 oldsnails@hotmail.com Author Tanmuangpak, Kitti Program of Biology, Department of Science, Faculty of Science and Technology, Loei Rajabhat University, Loei 42000 Thailand text ZooKeys 2020 980 23 42 http://dx.doi.org/10.3897/zookeys.980.54100 journal article http://dx.doi.org/10.3897/zookeys.980.54100 1313-2970-980-23 78EED563089C4804A91087DAF1B3D2EB FD77063CAE3F5DDFA5D3A7714A674E83 Aulacospira lampangensis Panha & Burch, 2002 Figure 2D Aulacospira lampangensis Panha and Burch 2002: 70, fig. 3. Type locality. Thailand, Ban Thasee, an isolated limestone hill of Lampang Province; 18°25'18.8"N , 99°45'11.6"E . Material examined. ZRCBUU 0403 (2 shells); Thailand, Ban Thasee, an isolated limestone hill of Lampang Province; 18°25'18.8"N , 99°45'11.6"E ; 3.vi. 2012; leg. Meesukko, C. Measurements. H = 1.6-1.8 mm, W = 2.0-2.3 mm. Diagnosis. Shell minute, depressed, with rounded whorls; spire moderately high; brownish. Protoconch smooth; teleoconch smooth; body whorl large, with two prominent spiral carinae; tuba projecting downward; peristome expanded; aperture with five teeth, columellar, parietal lamellae, upper and lower palatal plicae, and basal plica (Fig. 2D ). Radula. Unknown. Reproductive anatomy. Unknown. Distribution. This species appears limited to the type locality (Fig. 1 ).