• Title/Summary/Keyword: Pleuroceridae

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Study on Radulae of Seven Species of the Family Pleuroceridae in Korea (한국산 다슬기 과 7 종의 치설 연구)

  • 고정호;이준상;권오길
    • The Korean Journal of Malacology
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    • v.17 no.2
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    • pp.105-115
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    • 2001

  • These studies were conducted to compare the external radulae of seven species (Semisulcospira gottschei, S. coreana, S. forticosta, S. tegulata, S. ibertina, Koreanomelania nodifila and Koreoleptoxis globus ovalis) of freshwater snails in three genera of the family Pleuroceridae in Korea. Under a microscope of 100 magnifications, observation of seven species can be distinguished sharply between three genera of Semisuicospira, Koreanomelania and Koreoleptoxis, and the morphological characters of radulae can be used as taxonomic tool in genus level of Pleuroceridae. Besides SEM photograph of the radulae based on the morphological characters in seven species can be verified a new criteria for classification of genus' unit grade in accord with firsthand drawing sketch under a microscope of 100 magnifications. But it is difficult that all of the species can be detected sharply the difference of interspecies by comparisons of radulae in the family Pleuroceridae in Korea. Therefore, the morphological characters of radulae can not be set a criteria for classification of species level.

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Allozyme Variability in Tree of Genus Semisulcospira(Prosobranchia: Pleuroceridae) (다슬기속 3종(Prosobranchia: Pleuroceridae)에서의 도위효소 변이)

  • 정영헌;박준우;정평림;박갑만;김재진;민득영
    • The Korean Journal of Malacology
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    • v.15 no.1
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    • pp.13-20
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    • 1999

  • A horizontal starch gel electrophoresis for enzyme proteins extracted from three Korean species and one Chinese species of Semisulcospira was carried out in order to elucidate their genetic relationships. A total of 10 enzymes were employed in three different of buffer systems. Two loci from each enzyme of GAPDH, GOT, ICDH, IDH and PEP(VL); three loci from each of three enzymes, EST, PEP(LGG) and PGDH; and five loci from GPI were observed. Most of the loci in three pleurocerid species employed showed homozygous monomorphic banding patterns and some of them were specific as genetic markers between two different species. However, EST-2, PEP(LGG-3) and PGDH-1 loci in Korean S. libertina and PEP(LGG-3), PGM-1 and PGM-2 loci in Chinese S. libertina showed polymorphic banding patterns. Three Korean Semisulcospira species including S. libertina were more closely clustered in a dendrogram within the range of genetic identity values of 0.818-0.936, and these clusters were lineated with Chinese S. libertina at the value of 0.621.

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Karyotypes on three species of Chinese mesogastropod snails, Semisulcospira libertina, S. dolichostoma and Viviparus rivularis

  • Park, Gab-Man;Kim, Jae-Jin;Chung, Pyung-Rim;Wang, Yong;Min, Duk Young
    • Parasites, Hosts and Diseases
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    • v.37 no.1
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    • pp.5-11
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    • 1999

  • Three species of the families Viviparidae and Pleuroceridae, the first intermediate host of paragonimiasis, metagonimiasis and echinostomiasis were studied cytologically. The observed diploid chromosome number was as follows: Semisulcospira libertina 36, S. dolichostoma 34, and Viviparus rivularis 64. The mitotic chromosome complement of S. libertina has nine metacentric pairs and nine submetacentric pairs, and S. dolichostoma has three metacentric pairs and 14 submetacentric pairs of chromosomes. Viviparus rivularis showed two metacentric pairs and 30 submetacentric pairs of chromosomes.

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Isozyme Variation in Two Species of Freshwater Pleurocerid Snails in Korea: Koreanomelania nodifila and Koreoleptoxis globus ovalis (한국산 다슬기과 (Family Pleuroceridae) 2 종의 등위효소 변이)

  • 이준상;고정호;권오길
    • The Korean Journal of Malacology
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    • v.17 no.2
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    • pp.117-123
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    • 2001

  • A genetic analysis using starch gel electrophoresis was peformed to clarify the degrees of genetic differentiation among two species of the genus Koreanomelania and Koreoleptoxis (Gastropoda, Pleuroceridae). The average genetic similarity coefficients (S) among the populations of K. nodifila was S=0.848 (0.805-0.905) and K. globus ovalis was S : 0.755 (0.666-0.860). The genetic similarity coefficients between Semisulcospira gottschei and K. nodifila, S. gottschei and K. globus ovalis, and K. nodifila and K. giobus ovalis were 0.194, 0.301, and 0.301, respectively. So between K. nodifila and K. globus ovalis seems to be genetically two distinct taxa.

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