Eucyclops speratus. Female A abdomen, dorsal (Saint-Petersburg) B caudal rami, ventral (Udmurtia) C antenna, posterior (Saint-Petersburg) D coxobasis and first endopodal segment of antenna, anterior (Udmurtia) E coxobasis and first endopodal segment of antenna, posterior (Udmurtia) F P5, anterior (Saint-Petersburg). Scale bars: 100 μm (A); 50 μm (B–E); 20 μm (F).

 
 
  Part of: Novikov A, Sharafutdinova D, Abramova E, Mayor T, Chertoprud E (2025) An integrative approach to the delimitation of pseudocryptic species in the Eucyclops speratus complex (Copepoda, Cyclopoida) with a description of a new species. ZooKeys 1226: 217-260. https://doi.org/10.3897/zookeys.1226.138389