Nghiên cứu ghi nhận được 15 loài nhện thuộc 12 giống, 6 họ dựa trên kết quả phân tích 512 cá thể thu được trong vụ hè thu và vụ thu đông ở ruộng lúa trong và ngoài đê bao thuộc địa phận xã Lương Phi, huyện Tri Tôn, tỉnh An Giang. Trong đó, ba loài nhện Argiope dang (Araneidae), Clubiona coreana (Clubionidae) và Oxyopes sertatus (Oxyopidae) lần đầu tiên được ghi nhận cho khu hệ nhện Việt Nam. | Thành phần loài và các chỉ số đa dạng sinh học của khu hệ Nhện trên ruộng lúa xã Lương Phi, huyện Tri Tôn, An Giang VNU Journal of Science: Natural Sciences and Technology, Vol. 35, No. 2 (2019) 80-86 Original Article The Species Composition and Biodiversity Indices of Spider Fauna in the Rice Field of Luong Phi Commune, Tri Ton District, An Giang Province Dinh Minh Quang , Tran Thi Anh Thu, Nguyen Tuan Khanh Department of Biology, School of Education, Can Tho University, Campus 2, 3/2 street, Xuan Khanh, Ninh Kieu, Can Tho, Vietnam Received 30 April 2019 Revised 11 June 2019; Accepted 13 June 2019 Abstract: The study records 15 species belonging to 11 genera, 6 families based on the data analysis of 512 individuals collected during summer-autumn and autumn-winter seasons in the rice field both inside and outside the flood protection barrier in Luong Phi commune, Tri Ton district, An Giang province. Of these, Argiope dang, Clubiona coreana and Oxyopes sertatus belonging to Araneidae, Clubionidae, and Oxyopidae families, respectively, were firstly recorded for the spider- fauna in Vietnam. Clubiona sp., Erigone sp., Carrohtus sp. and Rhene sp. belonging to Clubionidae, Linyphiidae, and Salticidae families, respectively, were identified up to the genus level. Comprising 5 species, Araneidae was the largest family, followed by the family Salticidae with 4 species among the 15 identified species. That Araneus inustus and Oxyopes sertatus were found during summer-autumn and autumn-winter seasons, with the former of 257 individuals, shows that Araneus inustus was the most abundant species and could be the dominant species or the best-adapted species of the spider community. The number of species found in the autumn- winter season inside the barrier (9 species) was larger than that in summer-autumn season outside the barrier (5 species). Values of Margalef (d), Pielou (J’), Shannon-Weaver (H’) and Simpson
