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This work is a synthesis not only of the author’s studies but also of all studies undertaken in Vietnam from 1967 until 2013, and it is based on oribatid specimens obtained throughout the country. Its aim is to characterize the zoogeographical division of Vietnam based on its oribatid mite fauna. | TAP CHI SINH HOC 2015, 37(3): 353-361 Zoogeographical division of Vietnam DOI: 10.15625/0866-7160/v37n3.7592 ZOOGEOGRAPHICAL DIVISION OF VIETNAM BASED ON THE ORIBATID MITE (ACARI: ORIBATIDA) FAUNA Vu Quang Manh Hanoi National University of Education (HNUE), vqmanh@hnue.edu.vn ABSTRACT: Soil oribatid mites (Acari: Oribatida) had been collected throughout Vietnam, including 50 sites located in 27 provinces, and from all of the 8 natural geographical regions. Up to December 2013, the oribatid fauna of Vietnam is represented by 320 species (including four subspecies) belonging to 163 genera, 64 families (including two subfamilies), and 30 superfamilies. 34.68% of the total number is probably endemic species. 155 oribatid species, representing 48.44% of the total oribatid fauna, were recorded for the first time for the fauna of Vietnam. The oribatid fauna of Vietnam occupies 3.09% (320 vs. 10,342 species), 13.05% (163 vs. 1,249 genera), and 38.0% (62 vs. 163 families) of the World oribatid fauna. Based on the analysis of the oribatid mite fauna, from North to South the zoogeographical division of Vietnam can be divided into six sub-divisions, as follows: (1) Region between Northwest and Northeast (North Vietnam), (2) Region of the Red River Delta (North Vietnam), (3) Region of the Red River Delta: National Park Cat Ba Island (North Vietnam), (4) Region of North Central: National Park Ben En (North Central Vietnam), (5) Region between the Uplands of the Red River Delta and the National Park Phong Nha - Ke Bang (North Vietnam and Central North Vietnam), and (6) Region of Southern (the Mekong River Delta): the National Parks of Bu Gia and of Cat Tien (South Vietnam). Keywords: Acari: Oribatida, oribatid mite fauna, zoogeographical division, Vietnam. INTRODUCTION Oribatid mites (Oribatida van der Hammen, 1968) are small arachnids (0.1-0.2 to 1.0-2.0 mm), and are one of the dominant animal groups involved in the metabolic cycle of matter and energy flow in the soil .
