FIGURE 4 in Discrimination between two sibling species of Acroperus (Baird, 1843) from the Palearctic (Cladocera: Anomopoda: Chydoridae)

FIGURE 4. Acroperus harpae (Baird, 1834) from Russia, Murmansk Area, Khibiny Mountains, Lake Malyi Vud'yavr. A–E—parthenogenetic female: A—antennule, B—antenna, C–D—outer and inner part of thoracic limb I, E—endites of limb II; F—juvenile male of instar I, inner part of thoracic limb I; G–H - juvenile male of instar II, G—antennule, H—inner part of thorachic limb I; I–K—adult male, I—antenna, J–K—outer and inner part of thoracic limb I. Scale bars: 0.05 mm.