BIOL 312 Lecture Notes - Lecture 7: Sucking Louse, Mallophaga, Hippoboscidae
14 Nov 2017
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Lecture 7 neoptera continued and complete metamorphosis. Helpful phylogenetic tree: lots of genetics analyzed, good outgroups, breakdown of fully, partially winged or wingless. Makes it seem that re- evolution is common it is not! Maginnins: regeneration stunts wing growth and hinders flight performance in stick insects. Experimentally induced regeneration and measured wing growth and flight (clipped wings and dropped insects from 12 ft. ladders). Insects with regenerated legs had smaller wings, poorer flight. 45% of regenerated insects had crash landings, compared to 12% in controls. If losing legs is common, wings may be very costly. Sit and wait predators with modified raptorial forelegs (synapomorphy). Males smaller than females, sometimes consumed after mating. Scavengers or wood-eating, mostly tropical, nocturnal or diurnal, arboreal, some cave dwelling. Cockroaches harbour oligate intracellular bacterial endosymbionts in their ovaries and fat bodies (tissues used in storage and excretion). Maternally inherited, thought to be involved in uric acid recycling.
