Megasecoptera
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Megasecoptera is a paleozoic insect order. There were 22 families of megasecopterans with only about 35 known genera.
Like all other paleodictyopteroids, the megasecopterans had sucking mouthparts. The suctorial mouth parts were used to pierce plant casings and extract high-quality plant materials, such as spores and pollen.
Megasecoptera bore two pairs of wings (some very basal palaeopterans had three), which are nearly of the same size. The wings probably were held horizontally, as in dragonflies (Odonata, Anisoptera). The wing bases tend to be very slender and petiolated, as in damselflies (Odonata, Zygoptera). The body is long and thin. The genus Protohymen is rather stouter and shorter than a typical megasecopteran.
During their relatively brief period of existence, the Megasecoptera were rather successful. It has been estimated that this insect order accounted for 50% of the insect biomass in some locations, but the available evidence might be misleading.[citation needed].
[edit] Sources
http://www.palaeos.com/Invertebrates/Arthropods/Insecta/Paleoptera.html
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