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15. a) S3-S6 simple, without lateral foveae or swellings (Figure 27a); S5 with apical margin straight (Figure 28a) ….. Dufourea marginata (Cresson)
b) S3-S6 with lateral foveae or swellings (Figure 27b); S5 with apical margin concave (Figure 28b) ….. Dufourea fimbriata (Cresson) |
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Figure 27a: D. marginata (male), S3-S6 simple, without lateral foveae or swellings |
Figure 27b: D. fimbriata (male), S3-S6 with lateral foveae or swellings |
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Figure 28a: D. marginata (male), S5 with apical margin straight |
Figure 28b: D. fimbriata (male), S5 with apical margin concave |
