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eu = extra urogomphi
Gene: eu
Feature/structure: Urogomphi [paired "horns" at posterior tip of abdomen of larvae and pupae]
Linkage Group:  2 
Origin: Spontaneous.
Description: • Supernumerary pair of urogomphi develop via homeotic transformation of abdominal segment 9 toward 10.
Illustration:  
Illustration of eu mutant
 
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