FIGURE 6. Limnosida frontosa Sars, 1862 in Redescription of Limnosida frontosa Sars, 1862 (Crustacea: Cladocera: Sididae), with evidence of possible incipient species differentiation

FIGURE 6. Limnosida frontosa Sars, 1862, males (Lake Kilometrovoe, Komi Republic, European Russia). A, general lateral view. B, antennule. C, proximal part of antennule, outer side. D, aesthetascs. E, distal end of antennule, inner view. F, the same, lateral view. G, H, antennules of juvenile males with body length 0.75 and 0.83 mm, respectively. I, distal end of antennal basipodite, outer side. J, endopodite of the thoracic limb of first pair (tl I) with clasping hook, inner view (terminal soft setae on the end of endopodite is indicated by arrow; naked seta of tl I is indicated as "ns", setules of filtering setae not shown). K, apical end of endopodite of the same limb, frontal view. L, the same, outer view.