N1
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Ovoid
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Oriented backward, with an anterior terminal spine, without terminal fringe
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S1 conspicuous
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Triangular and short rami
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N2
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Elongated
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Opened laterally. Two terminal spines. Fringe of joined setae
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S1 conspicuous
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Elongated, thick and close rami
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First third without setule
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Two distal third with numerous setules
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N3
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Elongated
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Opened laterally. Two terminal spines and fringe of setae individualized
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S1 inconspicuous
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Slender and diverged rami
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Two distal third with spaced setules
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N4
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Elongated
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Opened laterally. Two terminal spines and fringe of setae individualized
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S1 absent
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One tubercle with setules between rami, in ventral view
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N5
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Elongated
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Opened laterally. Two terminal spines and fringe of setae individualized
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S1 absent, S5 inconspicuous
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One large tubercle with setules between rami
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Two symmetrical and lateral notches with spine
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