CLADOENDESIS OF EPHEMEROPTERA
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Figs 26–31. Labium of Demoulinia crassi. 26 – cross section of glossae and paraglossae; 27 – labium and maxilla; 28–31 – exuviae of glossae, paraglossae and labial palp: 28–29 – with focus on ventral side; 30–31 – with focus on dorsal side (gl:dl – dorso-lateral row of stout setae on glossa; gl:m – median row of stout setae on glossa; gl:vm – setae corresponding to ventro-median row of glossa; pg:dm – dorso-median row of long setae on paraglossa; pg:la – latero-apical long setae of paraglossa; pg:vm – long setae corresponding to ventro-median row of paraglossa).