Diagnosis of the genus Schellencandona (modified after Meisch 1996, 2000)
Carapace small, 0.4–0.6 mm long. Valves trapezoidal, subtrapezoidal, triangular or reniform, in some species LV and RV strongly asymmetrical in lateral view. Valves smooth or with shallow pits. Eye pigment absent. Male antenna dimorphic: penultimate segment subdivided and with male bristles (t2 and t3-bristles transformed). Setal group on the second segment of the mandibular palp with three setae; externo-distal seta (gamma-seta) of the penultimate segment smooth. Mx respiratory (branchial) plate with two setae. Cleaning leg: basal segment (protopod) with two setae (d1 and dp); penultimate segment with one distal seta (seta g); terminal segment with one short (h1) and two long setae (h2 and h3). Zenker organ with four+two rings of spines. M-process of the penis very flat.