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 Major Groups | Insecta (insects) | Hemiptera (bugs)

 
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12(1). Rostrum (R) short, broadly triangular, non-segmented with transverse sulcation; fore tarsus (T) 1-segmented (sometimes fused with tibia), fore tarsi modified to be scoop- OR sickle- OR spoon-shaped, with ventral fringe (F) of long hairs; head overlapping pronotum (P) anterodorsally

Note: Cnethocymatia is an exception, in that, rostrum is without transverse sulcation and fore tarsus is elongate, almost cylindrical
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rostrum triangular
non-segmented

Corixidae 

fore tarsi scoop-shaped
fore tarsi with fringe

Corixidae 

fore tarsi sickle-shaped

Corixidae 

fore tarsi spoon-shaped

Corixidae 

head overlapping pronotum

-Rostrum (R) cylindrical to conical, distinctly segmented, without transverse sulcation; fore tarsus (FT) cylindrical, with 1 or more segments, without a fringe of long hairs; head never overlapping pronotum (P) anterodorsally
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Notonectidae 

rostrum cylindrical, segmented

Notonectidae 

fore tarsus cylindrical
fore tarsus without fringe

Belostomatidae 

head not overlapping pronotum