Fig. 2

Wing base, thoracic pleura and legs of M. sharovi and recent mayflies. A Siphluriscus chinensis, lateral view of forewing base; B M. sharovi specimen 1700/386 + , lateral view of forewing base, photograph of dry specimen under oblique lighting; C M. sharovi specimen 212/26, lateral view of forewing base, photograph from ESEM; D M. sharovi specimen 212/26, lateral view of thorax, photograph under layer of ethanol; E body of M. sharovi specimen 212/26, with positions of detailed figures marked, photograph of dry specimen under oblique lighting; F M. sharovi specimen 212/26, foretarsi, photograph under layer of ethanol, numbers mark tarsal segments; G M. sharovi specimen 212/26, forewing base with arrows indicating spines on costa, photograph under layer of ethanol (in A-C, unmarked arrows point to basal curved part of radius adjacent to basal plate; scale bars represent A–D = 1 mm; E = 5 mm; F–G = 0.5 mm)