海南自然保护区的陆生和淡水贝类

考察了海南自然保护区的陆生和淡水贝类资源 ,采获陆生贝类标本 2 4种 (包括 1未定种 ) ,隶属于 1纲 9科 19属 ;淡水贝类标本共 16种 ,隶属于 2纲 7科 11属 .区系分析表明 :海南的陆生和淡水贝类区系组成以东洋界种类为主 ,其中热带种类占优势 ;海南的陆生和淡水贝类区系与广东大陆有密切关系 ;海南自然保护区的热带季雨林中 ,随着海拔升高 ,淡水贝类的分布呈减少趋势 ;海南的陆生和淡水贝类的大型种类多 ,人畜寄生虫中间宿主螺多

The Land and Freshwater Molluscs of Natural Reserves in Hainan

The land and freshwater molluscs resource were investigated in natural reserves of Hainan.24 species of land snails and 16 species of freshwater molluscs were collected,which were subordinate to 19 genera of 9 families within a class and 11 genera of 7 families within two classes respectively. The analysis of fauna showed that:the land and freshwater molluscs fauna share the characters of the oriental area and these species uniquely distribute in tropical area;the molluscs fauna in Hainan island is in close relation to that in Guangdong mainland;the vertical dispersion of snails is obvious,the species number decreasing with the increase in latitude;the molluscs fauna in Hainan are characterized by a large percent of the species that are macrotype and as the intermediate hosts for human and animals.