CLADOENDESIS OF EPHEMEROPTERA
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Kluge 2013 Nonnullidens: Figs 1-3 4-10 11-16 17-22 23-28 29-31 32-38 39-40 41-44 45-48 49-50 51-53

Figs 51–53. Subimaginal exuviae of mesonotum. 51 – Nonnullidens variegatus, female; 52 – Nonnullidens niger, male (holotype); 53 – Nonnullidens reductus, male (holotype). Abbreviations: a – pigmented area antediad of mesonotal suture; p – area posteriad of mesonotal suture.