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KMID : 0378119760030010015
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Chungnam Medical Journal
1976 Volume.3 No. 1 p.15 ~ p.20
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Study on the Some Differences between the Bithynia misella Gredler, 1884 and Parafossarulus manchouricus Bourguignat, 1860.
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Abstract
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A study dealt with the distribution, classification and morphology of two species of Bithyniidae; Parafossarulus manchouricus Bourguignat, 1860 and Bithynia misella Gredler, 1884 in Daesan Myeon Haman, Korea.
P. manchouricus was found throughout most spots of the area, and it was common in the irrigation canals, drainages and ponds, while B. misella was only collected in the irrigation canals, and is here reported for the first time. Dencities of population, B. misella and P. manchouricus, were 24 and 280 individuals in the same lots (5m2) of irrigation canal and the proportion of both species was 1 by 11. 7. Adult shells of B. misella varied in length 5.89; 0.77mm, in width 3.46±0.29mm, and P. manch-ouricus were 11.19±0.82mm in length and 5.82±0.5mm in width.
B. misella was distinguished from young specimens of P. manchouricus by its well rounded whorls, deeply idented suture, mantle color pattern and the inner lip of aperture at the rim.
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