Presentation is loading. Please wait.

Presentation is loading. Please wait.

Intro to Odonata Dragonflies and damselflies Online key: /michodo/test/Home.htm 5,500 spp. world 650 NA.

Similar presentations


Presentation on theme: "Intro to Odonata Dragonflies and damselflies Online key: /michodo/test/Home.htm 5,500 spp. world 650 NA."— Presentation transcript:

1 Intro to Odonata Dragonflies and damselflies Online key: /michodo/test/Home.htm 5,500 spp. world 650 NA

2 Adults near freshwater Larvae in many freshwater habitats –Few brackish Larvae are predators - capture prey with long, hinged labium

3 Mating - in flight, or perched Oviposition in tandem, or female alone Species where males remain attached more likely to get fertilization = sperm storage –Eggs fertilized during oviposition

4 Oviposition Some insert eggs into plant tissue Some drop eggs into water Some submerge

5 Incomplete metamorphosis (egg – nymph – adult) instars Wing pads appear after 6-7 molts Larval stage - few weeks to 5 years

6 Some univoltine = seasonal emergence at one time Some emerge through entire season Temporary pond species emerge quickly Some tropical species use tree holes or bromeliad pools

7 Larvae are generalized carnivores Early instars feed on protozoa Feeding sequence –Detection –Eject labium –Mandibles consume prey

8 Labium extended Grabs and holds prey - quickly Hooks, spines

9 Many odonate larvae are sit- and-wait-predators Conceal themselves by burrowing, climbing on vegetation, etc.Conceal themselves by burrowing, climbing on vegetation, etc.

10 Larval morphology Zygoptera = damselflies –More slender, head wider than thorax, 3 long tracheal gills at abdomen tip Anisoptera = dragonflies –Stout, head narrower than thorax, 5 short, stiff appendages at abdomen end

11 Head Labium = lower lip Antennae = 6-7 segments

12 Thorax Prothorax freely movable wingpads thorax tarsus tibia femur Lateral gill

13 Abdomen Zygoptera - epiproct and paraprocts form three gills wingpads thorax tarsus tibia femur Lateral gill

14 Abdomen epiproct paraproct Anisoptera - epiproct and paraprocts are dorsal to two cerci

15 Adults Compound eyes, short antennae Three ocelli

16 Adult wings Anisoptera - held horizontally at rest Zygoptera - wings above body at rest

17

18 Zygoptera = 3 families Calopterygidae Lestidae Coenagrionidae

19 Zygoptera families Calopterygidae –1st antennal segment long –Prementum with deep median cleft

20 Lestidae Short antennae Prementum stalked, spoon- shaped

21 Lestidae

22 Coenagrionidae Short antennae Basal half of prementum not narrowed

23 Anisoptera families Gomphidae Prementum and palpal lobes of labium flat No dorsal setae Antennae 4-segmented

24 Gomphidae

25 Petularidae Prementum and palpal lobes of labium flat Antennae 6- and 7-segmented Short, thick hairy antennae

26 Prementum and palpal lobes of labium flat Antennae 6- and 7-segmented Antennal segments short, bristle-like Aeshnidae

27

28 Cordulegastridae Prementum and palpal lobes spoon-shaped Distal edge of lateral lobe with irregular teeth

29 Corduliidae Prementum and palpal lobes spoon- shaped Distal edge of lateral lobe w/o irregular teeth Thick frontal horn, long metafemur

30 Corduliidae

31 Libellulidae Prementum and palpal lobes spoon- shaped Distal edge of lateral lobe w/o irregular teeth Shallow crenulations on lateral lobe of labium

32 Libellulidae


Download ppt "Intro to Odonata Dragonflies and damselflies Online key: /michodo/test/Home.htm 5,500 spp. world 650 NA."

Similar presentations


Ads by Google