 The abdomen is long and cylidrical in many species, but in the Libellulidae it may be relatively short and broad.It has ten segments (S1-S10), terminating with appendages on S10.Males have both upper appendages (cerci) and lower appendages (epiprocts in dragonflies and paraprocts in damselflies), which are used to hold females while mating; these are also termed claspers.