The Korean Journal of Malacology (한국패류학회지)
- Volume 3 Issue 1
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- Pages.35-43
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- 1987
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- 1225-3480(pISSN)
Morphological Differences of the Shells of Parafossarulus manchouricus ( Prosobranchia : Birthyniidae ) in Korea
한국산 쇠우렁 ( Parafossarulus manchouricus ) 패각의 형태학적 비교
Abstract
Morphological variations of six Korean and one Japanese populations of Parafossarulus manchouricus were observed. Mean length of shell was 9.36mm(n=376), and mean width was 8.0mm. Average aperture length and width were 4.72 and 3.78mm, respectively. Number of whorl ranged from 3.5 to 5.25(at most 4.5)in all popuiations . Yangsoori population had no spiral line or spiral keel, but ther populations had spiral lines. Number of spiral line on their penultimate shorls ranged 4 to 14.The lips of aperture were generally thickened, except in some Chongpyong, Haman and Fukuoka populations. The most of shell was eroded in only apex part and/ or in othker sculpture, especially Yangsoori population was heavily eroded.
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