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Adults have non-functional mouthparts so cannot feed.
Adults have non-functional mouthparts so cannot feed.
Both ''G. haemorrhoidalis'' and ''G. nasalis'' have spikes on the ventral surface of the larval segments arranged in two rows. ''G. intestinalis'' have mouth parts that are not uniformlu curved dorsally and the body spikes present have blunt ended tips.
Both ''G. haemorrhoidalis'' and ''G. nasalis'' have spikes on the ventral surface of the larval segments arranged in two rows. ''G. intestinalis'' have mouth parts that are not uniformly curved dorsally and the body spikes present have blunt ended tips.
===Life Cycle===
===Life Cycle===