"T . plagiata " is the world's largest dragonfly by wingspan and the female " T . plagiata " is probably the heaviest living odonate.
22.
The word " dragonfly " is also sometimes used to refer to all Odonata, but " odonate " is a more correct English name for the group as a whole.
23.
The structure of the penis suggests that, as with many other odonates, male " Megaloprepus " are able to displace sperm from previous matings, ensuring the paternity of the eggs.
24.
Many common insects of the Eastern United States can be found in West Virginia; 15 species of beetles, more than 70 species of Odonate, 12 species of stonefly, and about 17 moth species.
25.
Stomach contents of two adult specimens revealed a diet consisting of odonate larvae, snails of genus " Littoridina ", and amphipods ( " Hyalella gracilicornis " ); the last were the dominant group.
26.
Huang & Nel ( 2009 ) presented convincing evidence from a new fossil Tarsophlebiidae from China that the number of tarsomeres is only three as in modern odonates, but that the first tarsomere is about twice as long as the others.
27.
Bechly ( 1996 ) already discussed this possibility and suggested that such a long basal tarsomere, compared to the short basal tarsomere in protodonates and all Recent odonates, could still be a plesiomorphic state that could have resulted by the fusion of two basal tarsomeres.
28.
It is one of the few species in order Odonata in which males are larger than females, with abdomens up to 10 cm ( 4 in . ) long and wingspans of up to 19 cm ( 7.5 in . ) the greatest wingspan of all odonates.
29.
In some of the Hymenoptera a basal subdivision of the femur simulates a second trochanter, but the insertion of the reductor muscle on its base attests that it belongs to the femoral segment, since as shown in the odonate leg, the reductor has its origin in the true second trochanter.
30.
There are two substantially different insect flight mechanisms, and each has its own advantages and disadvantages-just because odonates have a more primitive flight mechanism does not mean they are less able fliers; they are, in certain ways, more agile than anything that has evolved afterward .-->
