Composition of Cladocera Species Diversity and the Redescription of Species Grimaldina Braizza Richard, 1892 (Macrotricidae, Anomopoda, Branchiopoda) for Zooplankton Fauna of Vietnam

Abstract

Cladocera is investigated in waterbodies of Vinh Long province during 2013 to 2014. Samples were collected from eight stations. 18 cladocera species belonging to 14 genus, 7 family, 2 order and 1 class were observed. In that, 14 species were recorded in 2013, and 15 species were recorded in 2014. The species composition of order Anomopoda always dominates in waterbodies. The species Grimaldina brazzai Richard, 1892 (Macrotricidae, Anomopoda, Branchiopoda) are redescribed from material collected in Co Chien river of Vinh Long province in 2013. The results have identified 04 female individuals, but no male individuals of G. brazzai are recorded. Morphological characteristics of G. brazzai are as descriptive as Richard (1892), Brook (1956) and Idris (1983). Morphological characteristics of Grimaldina và G. brazzai female are described and illustrated details by Optikam and Adobe Illustrator CS5. Some morphology characters used to identify, e.g., eye, head pores, Labral plate, Antennule I - II, postabdomen. The genus Grimaldina comprises only one species G. brazzai. This species has been recorded in lakes and rice fields of Brazil, Thailan, Lao, Philippines, Indonesia, Malaysia, Cambodia and Singapore, rare species. The first time in Vietnam Shirota (1966) was recorded this species in South Vietnam, but he has not describe.