Abstract

• Studies on diversity of brachionid rotifers were conducted at Ye River Mouth (Lat. 15° 04′ N and Lat. 15° 12' N, Long. 97° 46' E and Long. 97° 48' E) in southern Mon coastal water from January to December 2018. Mon coastal water rotifers are least studied and authenticated records are not available for sufficing the data on their biodiversity. Rotifers were collected from brackish water to know their species diversity. A total of 12 species of branchionid rotifers identified during this study are Brachionus angularis Gosse, 1851, B. calyciflorus (Pallas, 1766), B. caudatus Barrois & Daday, 1894, B. diversicornis (Daday, 1883), B. donneri Brehm, 1851, B. falcatus (Zacharias, 1898), B. forficula Wierzejski, 1891, B. murrayi (Fadeew, 1925), B. plicatilis (Mu ller, 1786), B. quadridentatus Hermann, 1783, B. rotundiformis (Tschugunoff, 1921) and B. urceolaris (Mu ller, 1773). This is a primary record on brachionids of euryhaline water of Ye River Mouth. The detailed description of the rotifers recorded during the study in southern Mon coastal water is presented for substantiating the taxonomic relevance of the study.