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| Otostephanos macrantennus de Koning 1947 |
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| Otostephanos macrantennus, whirling specimen; dorsoventral view, focal plane on the conspicuous long dorsal antenna (1) |
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| Otostephanos macrantennus, same specimen; dorsoventral view, focal plane on the triangular-shaped upper lip. (1) |
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| Otostephanos macrantennus, crop of the above image. Ramate trophi with dental formula (DF): 9/9. (1) |
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| Otostephanos cf macrantennus, whirling specimen; ventral view. The arrowheads point to a distinct dentated structure on the ventral side the 1st neck pseudo-segment, which is in contrast to the 3 rows of spinules in the 1st neck pseudo-segment Otostephanos monteti. (1) |
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| Otostephanos cf macrantennus, whirling specimen; dorsoventral view, with focus on the mastax (2) dorsal view; the arrowheads point to the characteristic long dorsal antenna. |
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| Otostephanos cf macrantennus, whirling specimen; dorsoventral view, with focus on the mastax (2) ventral view, (2) |
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| Otostephanos cf macrantennus, specimen with retracted corona. (2) |
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| Otostephanos cf macrantennus, ventral view of foot with 3 toes and triangle-shaped spurs. In contrast to Otostephanos monteti there is no interspace beween spurs. (2) |
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| Otostephanos cf macrantennus, ramate trophi, dental formula (DF) 9/9. (1) |
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