| Otostephanos monteti, swimming specimen (therefore the corona is expanded); dorsoventral view, (2) |
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| Otostephanos monteti, swimming specimen (corona is expanded); ventral view, focal plane on the 3 rows of small spinules on the first neck opseudosegment (see detail in image below). (2) |
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| Otostephanos monteti, lateral view, (2) |
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| Otostephanos monteti, two aspects of the anterior part of whirling specimen, dorsoventral view. Left: Focus plane on the one-lobed upper lip (crop of the first image). Right: focus plane on the "knob" (2) |
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| Otostephanos monteti, left: aspect of the anterior part of creeping specimen (corona retracted) view; in contrast to Otostephanos macrantennus this species has 3 rows of small spinules posterior of the mouth on the ventral integument of the 1st neck pseudo-segment (2). Right: another specimen from (3). |
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| Otostephanos monteti, foot with triangular spurs with interspace (the last trait is also different from O. macrantennus with triangular spurs without interspace). (2) |
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| Otostephanos monteti, ventral integument; contrast-enhanced image. (2) |
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| Otostephanos monteti, trophi. left: cephalic view; dental formula DF: 8/8; right: caudal view; ramus lenghth (RaL): 19µm. (2) |
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