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| Cephalodella rigida Donner, 1950 |
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| Cephalodella rigida, a species without eyespot, lateral view. Toe length medium size (total length : toe length < 5:1); tail covers foot (arrowhead); Specimen from (1) |
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| Cephalodella rigida, slightly compressed specimen, focal plane on the brain with pronounced retrocerebral organ (RCO); retrocerebral sac with light-refracting body. tail covers foot (arrowhead); Specimen from (2) |
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| Cephalodella rigida, crop of the above image. The arrow points to the light-refracting body (2) |
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| Cephalodella rigida, dorsoventral view. Specimen from (2) |
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| Cephalodella rigida, incus and manubrium of virgate trophi, type B. |
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| Cephalodella rigida, details of the trophi: upper left: focal plane on the U-shaped pleural rods between the manubria (1). Upper right: same trophi, focus plane on the fulcrum and one of the manubria (2); lower left: one of the rami (2); lower right: manubrium with lamellae and "fan-like" end (1) |
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