目的 研究辽宁省蚤类区系及其分布特征。方法 于2008－2015年对辽宁省境内不同自然地理区开展蚤类调查，对采集到的蚤类标本进行系统分类；运用动物地理学和自然地理学原理及方法，研究辽宁省蚤类在不同动物地理区的分布规律。结果 辽宁省发现蚤类47种，隶属于6科23属。其中干草原蚤种19种、林区蚤种17种、世界广布种6种和世界局部广布种5种。在世界区系分布中与东洋界共有蚤种16种，共有成分最多，关系最密切；其次是新北界9种；与其他界别共有蚤种全部为世界广布种，关系疏远。在古北界区系分布中分布东北亚界、中亚亚界、西伯利亚亚界、欧洲亚界和地中海亚界蚤种分别为46、42、35、9和7种。因此，辽宁省与西伯利亚共有蚤种数量最多，关系最密切，其次是欧洲亚界，与地中海亚界联系较少；国内区系分布中东北区、华北区、蒙新区、青藏区、华中区、西南区和华南区分布蚤种分别为41、42、38、15、15、10和9种。结论 蚤类与其他自然要素是环境不可分割的组成部分；辽宁省蚤类在各动物地理区的分布是与自然地理环境相适应的结果。

Objective To study faunal characteristic of flea in Liaoning province. Methods Field collection and supplement literature, investigation on flea in different natural geographic regions in Liaoning province during 2008-2015, the collected flea specimens were systematically classified. Using the principles and methods of animal geography and physical geography to study the distribution of fleas in different animal geography areas in Liaoning province. Results In total 47 species, 6 families 23 genera of fleas were found in Liaoning province, of which 19 species of grassland fleas, 17 species of forest fleas, 6 species of worldwide distribution, and 5 species of local distribution. In the distribution of the world flora, and 16 species shared with Oriental world the most common and the most closely related, followed by the new North sector of 9 species. And all the other groups of fleas were worldwide species, the relationship was distant. There are 46 species of fleas in Northeast Asia, 42 species of subcontinent in Central Asia, 35 species of Siberian subfamily, 9 species of subcontinent in Asia and 7 species of subcontinent in suburbs. Therefore, Liaoning and Siberia shared, the largest number of fleas and the most closely related, followed by the European sub-community, and the Mediterranean Asia with less connection; there are 41 species of flea, 42 species in North China, 38 species of Mengxin district, 15 species of Qinghai-Tibet area, 15 species of central area, 10 species of southwest area and 9 species in southern China. Conclusion Fleas, like other natural elements, are an integral part of the environment, the distribution of fleas in each animal's geographical area is the result of adaptation to the natural geographical environment.