Zoology Chapter 15
Terms
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- Permitted insects as dominant terrestrial class of organisms
-
1) Flight
2) Waxy epicuticle
3) Flight
4) Dessication resistant eggs
5) Metamorphosis
6) High reproductive potential
7) Diversification of mouthparts & feeding habits - Which subphlyum more closely related to Crustaceans
- Hexapods
- Monophyletic phylum?
- Arthropoda
- Paraphyletic? subphylum
- Crustacean
- Metamerism, tagmatization, jointed exoskelton, ventral nervous syst
- Arthropoda
- Head & trunk, 4 pair head appendages, uniramous appendages
- Subphylum Myriapoda
-
Two pair of legs per segment, round
Millipedes - Class Diplopoda
-
One pair leg per segment, oval, poison claws
Centipedes - Class Chilopoda
- 11 segment, soft, 9 leg pairs
- Class Pauropoda
- Long antennae, centipede-like, 10-12 pair, no eyes, spinnerets
- Class Symphyla
-
Head, thorax, abdomen; 5 pair of head appendages, 3 pairs of uniramous appendages on thorax
Insects & co. - Subphylum Hexapoda
- Exposed & projecting mouth appendages, mandibles, well-developed Malpighian tubules
- Class Insecta
- Disgestion & absorption
- Midgut
- Modified like sucking, muscular pharynx
- Foregut
- Reabsorb water
- Hindgut