• The Korean Journal of Malacology
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• v.20 no.1
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• pp.1-6
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• 2004

An anatomical and ultrastructural study on the dart sac and the dart of a Korean snail Nesiohelix samarangae was conducted to understand their morphological characteristics with the help of the light microscope and electron microscopes, TEM and SEM. Nesiolelix samarangae had two darts which are pure white structures 6-8 mm in length, tapering from 0.6-0.8 mm to 0.15-0.3 mm. The dart sac had a long conic lumen subdivided into two by a septal wall, and the darts were centrally embedded in the thick muscular layers of the sac. The darts occupied each of the two luminal spaces one per each. The convexed surfaces of the darts had many crystal buds in the shape of the petals. Otherwise, the convexed surfaces of the darts had numerous crystal buds in the shape of candle or topaz. The luminal surface of the dart sac was covered with a single columnar epithelium. The epithelial cells possessed microvilli on their free surface.

• Proceedings of the Malacological Society of Korea Conference
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• 2003.11a
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• pp.21-22
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• 2003

• The Korean Journal of Malacology
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• v.10 no.1
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• pp.9-18
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• 1994

This study was conducted to compare the genital organs of 14 land snail species belonging to family Bradybaenidae in Korea. The species used for present experiment were characterized by well developed dart sac, accessory sacs and two mucous glands between accessory sacs. No flagellum in the snails of three species employed(Acusta despecta sieboldiana, Koreanohadra kurodana, K. koreana) was observed in this study. The similarity value between Koreanohadra kurodana and Koreanohadra koreana (S=0.834) was more higher than the other species pairs. The higher value followed was recorded between Aegista gottschei and Aegista pyramidata (S=0.761). The clustering type by anatomical genital organs was similar to that analysed by the shell morphologies.