CLADOENDESIS OF EPHEMEROPTERA
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Figures 149–152. Crassolus. 149 – Centroptella (Crassolus) ingridae (holotype), fore wing; 150 – Centroptella (Crassolus) inzingae (lectotype) (gv – gonovectis; us – proximal margin of unistyliger), genitals; 151–152 – Centroptella (Crassolus) saxophila, gonovectes (specimens reared from larvae by N. Kluge in the Western Cape Province of South Africa).