| Brachionus quadridentatus: dorsal view; focus plane on the dorsal spines of the anterior part of the lorica. The median (M) spines are longer than the intermediate (Im) spines and the lateral (L) spines. (1) |
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| Brachionus quadridentatus: dorsoventral view; focal plane on the anterior ventral margin of the lorica. (1) |
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| Brachionus quadridentatus: dorsoventral view; the arrows point to the three ciliated lobes of the pseudotrochus. The arrowheads mark the lateral antennas (4) |
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| Brachionus quadridentatus: dorsal view;focal plane on two ??sensory?? bristles beside the median lobe of the pseudotrochus.. (6) |
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| Brachionus quadridentatus: malleate trophi. |
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| Brachionus quadridentatus: dorsoventral view; the length of the posterior spines may vary; see also here >>. (2) |
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| Brachionus quadridentatus: specimen with amictic eggs and peritrich ciliated epibionts (2). |
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| Brachionus quadridentatus: sometimes this species is infested by parasites, here: Bertramia asperospora (Plistophora asperospora) (3) |
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