CLADOENDESIS OF EPHEMEROPTERA
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Kluge 2019: Figs 1-3 4-11 12-16 17-21 22-28 29-35 36-40 41-43 44-50 51-58 59-69 70-74 75-80 81-82 83-88  

   

Fig. 4–11. Labrum of last instar larvae of Guajirolus ektrapeloglossa from Quebrada Barrigón. 4 – labrum; 5 – exuviae of labrum; 6 – longitudinal section of lateral part; 7–8 – one and the same median emargination differently compressed; 9–11 – fragments of exuviae of one labrum: 9 – with focus on distal margin; 10 – with focus on dorsal side; 11 – detached ventral cuticle (right side at right).