• The Korean Journal of Malacology
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• v.13 no.2
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• pp.117-123
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• 1997

S study on the distribution of land snails in Kangweon-Do was carried out from May 1990 to July 1995. Mirus sp, and Aegista gottschei kongoensis were unrecorded in Korea and south Korea, respectively, As a result of this stududy, 21 families and 62 species of land snails are reported from Kangweon-Do, Korea.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.25 no.3
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• pp.83-95
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• 2022

This study aims to present primary data for habitat restoration and artificial breeding conditions of L. unmunsana by identifying the habitat conditions and the larvae's food sources. In order to investigate the habitat characteristics of the adult L. unmunsana and land snails, which are the primary food sources for the larvae, field surveys were conducted on a total of 10 habitats in south-central parts of Korea including Sanseongcheon, Jeonju. The results revealed that the L. unmunsana habitat in the Sanseongcheon area had a broadleaf forest with a multi-layered vegetation structure, adjacent water features, and the north/northeast/northwest slopes with little effect of artificial lighting. The adult L. unmunsana in the Sanseongcheon area appeared from the end of May to the end of June, and was especially intensively observed around the middle of June. The most active time was from 23:30 to 00:30 with a temperature range of 19~22℃ and higher than 80% humidity. The peak count of the observed adults L. unmunsana was a total of 774 on June 11, 2021. In the case of land snails, 11 families and 23 species were observed in 10 habitats of L. unmunsana, and Euphaedusa fusaniana was the most extensive and the most observed in the five survey areas. The land snails of L. unmunsana habitats are mostly found under the organic layers of leaves and a fallen tree branch in broadleaf forests, where a thick organic material layer buffers temperature changes and provides high humidity for various snails. These habitat conditions are suitable for the larva of L. unmunsana and land snails to inhabit, feed, hide and hibernate.

• Proceedings of the Zoological Society Korea Conference
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• 1994.10a
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• pp.105.2-105
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• 1994

No Abstract, See Full Text

• Korean journal of applied entomology
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• v.49 no.4
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• pp.423-428
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• 2010

The species of land snails (Stylommatophora) that feed on perilla plants were observed under leaf perilla greenhouses cultivated in the Milyang and Busan areas. Four species of land snails were recorded. Among them, three species were slugs, Meghimatium bilineatum in Phlomycidae, Deroceras reticula tum, and Limax marginatus in Limacidae, and one species was the snail Acusta despecta sieboldiana in Bradybaenidae. D. reticulatum occurred most frequently followed by A. despecta sieboldiana, L. marginatus and M bilineatum. Annually, land snails showed two peaks in the middle of April and in late November for D. reticulatum, early May to middle November for A. despecta sieboldiana, and middle April and early November for L. marginatus. M bilineatum, however, did not show any clear peak because of its low population occurrence.

• Parasites, Hosts and Diseases
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• v.53 no.5
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• pp.647-651
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• 2015

The aim of this study was to determine the presence and prevalence of larval stages of Dicrocoelium dendriticum and Brachylaima sp. in the first intermediate host, a species of land snail, Helix aspersa, in Turkey. A total of 211 snails were collected in April-May 2014 from pastures in Mersin District. Larval stages of D. dendriticum were identified under a light microscope. Hepatopancreas from naturally infected H. aspersa snails were examined histologically. The prevalence of larval stages of D. dendriticum and Brachylaima sp. in H. aspersa snails was found to be 2.4% and 1.9%, respectively, in Mersin, Turkey. Cercariae were not matured in sporocysts at the beginning of April; however, it was observed that cercariae matured and started to leave sporocysts by early-May. Thus, it was concluded that H. aspersa acts as an intermediate host to D. dendriticumin and Brachylaima sp. in Mersin, Turkey. A digenean trematode Brachylaima sp. was seen for the first time in Turkey.

• The Korean Journal of Malacology
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• v.10 no.2
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• pp.1-9
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• 1994

Molluscs from the Neolithic shell middens (Sugari, Pudjeong, Tongsamdong, Sangnodaedo, Sandeung, Yondaedo, Songdo and Kupyongri) in the southern coast, Korea, consisted of marine, fresh-water and land molluscs. Among these, intertidal species were exploited most abundantly as food resources, indicating a high dependence of intertidal shellfish collection activities. Especially oysters were the most abundant in these sites except Tongsamdong where mussels were predominant, indicating oysters were the most important food resources. Land snails from the sites consisted of woodland and open land species. Woodland species were more abundant than openland species, suggesting that there was a woodland environmint around the sites. Marine and land mollusc species from the sites are common in these rigions today, indicating no large-scale emvironmental changes have occurred since these middens formation period.

• The Korean Journal of Malacology
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• v.9 no.2
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• pp.44-56
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• 1993

These studies were conducted to compare the external morphologies of 15 species of land snails in 8 genera of family Bradybaenidae in Korea. Principal component analyses of 15 species can be divided into five groups based on the morphological characters and the result of cluster analyses were in accord with the principal component analyses. The morphological intraspecific similarity of Nesiohelix samarangae of Mitan and Cheju population(S=0.999) proved to be highest. The degree of interspecific similarity between Aegista(Plectotropis)divesa and Aegista(plectotropis)quelpartensis(S=0.970)were more similar than the other interspecies.

• Animal Systematics, Evolution and Diversity
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• v.39 no.4
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• pp.295-299
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• 2023

Two land snails, Aegista chejuensis (Pilsbry and Hirase, 1908) and Plectotropis quelpartensis (Pilsbry and Hirase, 1908), are endemic to Korea and were collected from Hataedo and Jodo Islands in the Yellow Sea of South Korea, respectively. Many terrestrial snail habitats have been confirmed in Korea; however, their genetic sequences have rarely been reported. This study describes the mitochondrial cytochrome c oxidase subunit I gene (COI) sequences of two species, followed by an analysis of the genetic distance between these two species and their congeners. As a result, there was no intra-species variation in both species A. chejuensis or P. quelpartensis. However, the inter-species variation was clear (10.3-31.5%). We provide photographs and a brief diagnosis for morphological verification.

• The Korean Journal of Malacology
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• v.30 no.4
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• pp.391-397
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• 2014

Previously, we have reported expressed sequence tags (ESTs) analysis on the land snail, Nesiohelix samarangae (Ns). Of these ESTs, we have identified four partial fragments of N. samarangae cytochrome oxydase I (NsCO-I) gene which lead to obtain an 852 bp partial cDNA. Since NsCO-I is one of the best-known molecular phylogenetic markers, we have attempted to conduct comparative in silico analysis by using the NsCO-I gene. The combined results from BLAST analyses, multiple sequence alignment and molecular phylogenetic study of NsCO-I cDNA indicate that N. samarangae has similarity to three land snails such as Elona quimperiana, Euhadra herklotsi and Euhadra idzumonis.

• 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.