19 Georissa leucococca sp. n. 19A Frontal view, shell 0.85 mm high 19B Frontal view, shell 1.05 mm high (19A Malaysia, Sabah, Interior Province, Sepulut valley, Gua Pungiton, RMNH.5003956, holotype 19B Malaysia, Sabah, Interior Province, Sepulut valley, Gua Sanaron, V 8068) 20 Georissa nephrostoma sp. n. Frontal view, shell 1.35 mm high (Malaysia, Sabah, Sandakan Province, Kinabatangan valley, Batu Keruak 2 near Sukau, RMNH.5003955, holotype).