This is similar in location on the wing to a true pterostigma but is crossed by veins and is only defined by its paler colour compared to surrounding areas of the wing.
22.
The overall sizes of both pterostigma and prestigma are different then seen in members of Electrobombini, while the apical area is papillate, showing small bumps, as seen in Bombini.
23.
Unlike " Eickwortapis " the inner metatibial spur on " Nesagapostemon " is hooked and the inner border of the " C " vein is double the length of the pterostigma.
24.
Male " S . fonscolombii " can be mistaken for " Crocothemis erythraea " as both are very red dragonflies with yellow bases to the wings, red veins and pale pterostigma.
25.
The size and shape of the pterostigma are similar to those of the Apinae tribes Anthophorini and Centridini though the rounded shape of the wing and the sizes of the cells formed by the wing veins make it closer to Anthophorini.
26.
The remaining genera of the family were placed into a third subfamily, "'Mesoraphidiinae "', all with the shared character of a Sc vein which ends about midway towards the wingtip and a pterostigma that does not have any crossveins.
27.
All species in the genus are noted for the small size of the pterostigma when compared to other raphidiopteran species . " P . hopkinsi " and " P . gomezi " were described by James E . Jepson and Edmund A . Jarzembowski in a 2008 paper published in the journal " Alavesia " . " P . hopkinsi " is known from a fossil found in deposits of the Late Hauterivian stage of the Lower Cretaceous.
