CLADOENDESIS OF EPHEMEROPTERA

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Kluge 2004: Fig.4

Figure 4. Winged stages of Siphlonurus/fg4 aestivalis [Siphlurus].

A male subimago, head and thorax, lateral view; B male imago, the same; C female imago, head, lateral view. (B, C from Kluge 2000)

Abbreviations: BS basisternum of mesothorax; fr face fold (frons); FS furcasternum of mesothorax; PCxsA anterior paracoxal suture of mesothorax; PhM middle phragma; pt patella; ta tarsus; ti telotibia; to1 stenothoracic tracheostium (first thoracic spiracle); to2 cryptothoracic tracheostium (second thoracic spiracle).