Portal:Insects

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The Insects Portal

Insects (from Latin insectum) are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes, and a pair of antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. (Full article...)

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Two Belgica antarctica adults

Belgica antarctica, the Antarctic midge, is a species of flightless midge, endemic to the continent of Antarctica. At 2–6 mm (0.08–0.2 in) long, it is the largest purely terrestrial animal native to the continent. It also has the smallest known insect genome as of 2014, with only 99 million base pairs of nucleotides and about 13500 genes. It is the only insect that can survive year-round in Antarctica. (Full article...)

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... that species in the fossil ant genus Myrmeciites are named for Hercules, Goliath, and a river?
... that Euploea alcathoe, the common crow butterfly, may pass through several generations in a year?
... that the female sand wasp Ammophila sabulosa digs burrows in sandy ground, provisioning each burrow with a food supply of paralysed caterpillars, always laying one egg on the first caterpillar?
... that larvae of the toadfly make their way through the nostrils of the common toad and eat its flesh?
... that the rice stink bug, a major pest of rice kernels, can possibly be ignored when found on standing maize?

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The following are images from various insect-related articles on Wikipedia.

Image 1
Insect morphology
Legend of body parts
Tagmata: A – Head, B – Thorax, C – Abdomen.
1. antenna
2. ocelli (lower)
3. ocelli (upper)
4. compound eye
5. brain (cerebral ganglia)
6. prothorax
7. dorsal blood vessel
8. tracheal tubes (trunk with spiracle)
9. mesothorax
10. metathorax
11. forewing
12. hindwing
13. mid-gut (stomach)
14. dorsal tube (heart)
15. ovary
16. hind-gut (intestine, rectum & anus)
17. anus
18. oviduct
19. nerve cord (abdominal ganglia)
20. Malpighian tubes
21. tarsal pads
22. claws
23. tarsus
24. tibia
25. femur
26. trochanter
27. fore-gut (crop, gizzard)
28. thoracic ganglion
29. coxa
30. salivary gland
31. subesophageal ganglion
32. mouthparts
(from Insect morphology)
Image 2Generalized arthropod biramous limb. Trueman proposed that an endite and an exite fused to form a wing. (from Insect flight)
Image 3Venation of insect wings, based on the Comstock-Needham system (from Insect morphology)
Image 4Larva of beetle, family Cerambycidae, showing sclerotised epicranium; rest of body hardly sclerotised (from Insect morphology)
Image 5Mandibles of Rhyniognatha hirsti, it may be an oldest insect, but also possible to be a myriapod. (from Evolution of insects)
Image 6The abdominal terminus of male scorpionflies is enlarged into a "genital bulb", as seen in Panorpa communis (from Insect morphology)
Image 7Reconstruction of a Carboniferous insect, the palaeodictyopteran Mazothairos (from Insect flight)
Image 8Indian moon moth (Actias selene) with some of the spiracles identified (from Respiratory system of insects)
Image 9Stylized diagram of insect digestive tract showing malpighian tubule, from an insect of the order Orthoptera. (from Insect morphology)
Image 10Scanning electron micrograph of a cricket spiracle valve (from Respiratory system of insects)
Image 11Male genitalia of Lepidoptera (from Insect reproductive system)
Image 12Hoverfly (Philhelius pedissequum) has indirect flight musculature. (from Insect flight)
Image 13Larva of Syrphid fly, member of Cyclorrhapha, without epicranium, almost without sclerotisation apart from its jaws. (from Insect morphology)
Image 14Frenulo-retinacular wing coupling in male and female moths (from Insect flight)
Image 15Mazothairos, a Carboniferous member of the now extinct order Palaeodictyoptera. (from Evolution of insects)
Image 16A pie chart of described eukaryote species, showing just over half of these to be insects (from Insect biodiversity)
Image 17The Odonata (dragonflies and damselflies) have direct flight musculature, as do mayflies. (from Insect flight)
Image 18Reconstruction Strudiella devonica as a possible hexapod (from Evolution of insects)
Image 19Fossil gnat in amber, a well-preserved insect fossil. (from Evolution of insects)
Image 20Mayfly nymph with paired abdominal gills (from Insect flight)
Image 21Closeup of a fire ant, showing fine sensory hairs on antennae (from Insect morphology)
Image 22The female genitalia of Lepidoptera (from Insect reproductive system)
Image 23The development of insect mouthparts from the primitive chewing mouthparts of a grasshopper in the center (A), to the lapping type (B) of a bee, the siphoning type (C) of a butterfly and the sucking type (D) of a female mosquito.
Legend: a – antennae
c – compound eye
lb – labium
lr – labrum
md – mandibles
mx – maxillae (from Insect morphology)
Image 24Bumblebee defecating. Note the contraction of the anus, which provides internal pressure. (from Insect morphology)
Image 25Queen Alexandra's birdwing (Ornithoptera alexandrae) of Papua New Guinea (from Insect biodiversity)
Image 26A tau emerald (Hemicordulia tau) dragonfly has flight muscles attached directly to its wings. (from Insect flight)
Image 27Direct flight: muscles attached to wings. Large insects only (from Insect flight)
Image 28Variety of male structures in Phlebotominae (Diptera, Psychodidae) (from Insect reproductive system)
Image 29Cross-section of wing vein (from Insect morphology)
Image 30Evolution has produced astonishing variety of appendages in insects, such as these antennae. (from Evolution of insects)
Image 31Head of Orthoptera, Acrididae. a:antenna; b:ocelli; c:vertex; d:compound eye; e:occiput; f:gena; g:pleurostoma; h:mandible; i:labial palp; j:maxillary palps; k:maxilla; l:labrum; m:clypeus; n:frons (from Insect morphology)
Image 32Diagram of a typical insect leg (from Insect morphology)

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Credit: Noodle snacks

The Meadow Argus, Junonia villida (Lepidoptera: Nymphalidae), is a butterfly commonly found in Australia. It is also known as Albin's Hampstead Eye in the United Kingdom, where it has occurred only as an accidental import.

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WikiProject Insects

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