摘要：We investigated the diversity of brachionid rotifers in Thailand.Rotifers were collected from a wide range of habitat types (294 sites, 508 samples) including canals, lakes, peat swamps, ponds, reservoirs, rice fields, rivers, swamps and temporary ponds from April 1998 to January 2004.Twenty-eight species including 11 infrasubspecific forms belonging to five genera were identified.The most frequently encountered species was Brachionus falcatus (50.7% of the sampling sites), followed by Keratella cochlearis (50%), B.angularis (49.7%), K.tropica (46.3%) and B.forficula (45.9%).Less frequently encountered species were B.caudatus , B.durgae and B.urceolaris .These species were found in low abundances and only in a single site.Two sites in the Northeast – Nong Changpeuak and Bueng Srithat – recorded the greatest richness with 15 taxa, whereas no brachionid rotifers were found in 31 sites.On average, the species richness was five taxa per sampling site.A key to the genera and species of Thai brachionid rotifers is provided.
