Aquatic worms With almost 200 described species, including more than 160 endemics, the center of diversity for aquatic freshwater oligochaetes is Lake Baikal.Segers, H.; and Martens, K; editors (2005). The Diversity of Aquatic Ecosystems. pp. 43–44. Developments in Hydrobiology. Aquatic Biodiversity. A smaller number of other freshwater annelids is known: 30 species of leeches (Hirudinea),Kaygorodova, I.A.; and N.M. Pronin (2013). New Records of Lake Baikal Leech Fauna: Species Diversity and Spatial Distribution in Chivyrkuy Gulf. ScientificWorldJournal. 2013(2013): 206590. and 4 polychaetes. Several hundred species of nematodes are known from the lake, but a large percentage of these are undescribed.
Aquatic worms With almost 200 described species including more than 160 endemics the center of diversity for aquatic freshwater oligochaetes is Lake BaikalSegers H; and Martens K; editors (2005) The Diversity of Aquatic Ecosystems pp 43–44 Developments in Hydrobiology Aquatic Biodiversity A smaller number of other freshwater annelids is known 30 species of leeches (Hirudinea)Kaygorodova IA; and NM Pronin (2013) New Records of Lake Baikal Leech Fauna Species Diversity and Spatial Distribution in Chivyrkuy Gulf ScientificWorldJournal 2013(2013) 206590 and 4 polychaetes Several hundred species of nematodes are known from the lake but a large percentage of these are undescribed