The Terrestrial Mandibulates
(another Arthropoda group)
Insects far outnumber all the other species of animals in the world combined.
Some scientists have estimated that there are 200 million insects for every
single human alive today. Insects have an unmatched ability to adapt to all land
environments and to virtually all climates.
Subphylum Uniramia (5 classes)
The members of the Subphylum Uniramia are primarily terrestrial
arthropods. Only a few have returned to aquatic life, usually in fresh
water.
- all appendages uniramous
- mostly terrestrial
- tagmata
- head and trunk or
- head, thorax, abdomen
(appendages attached)
- 1 pair antennae
- respiration
- gills in aquatic insects
- tracheae
- excretion
(Malpighian tubules)
Class Chilopoda
The Chilopoda or centipedes (fig. 21-1 are landforms with somewhat flattened
bodies that may contain from a few to 177 somites.
- centipedes
- poison claws
- moist, dark habitats
- carnivores
Class Insecta
The Insecta are the most diverse and abundant of all the groups of
arthropods; this class is the largest class in the animal kingdom.
- largest class in animal kingdom
- most diverse and abundant of all arths
Entomology: the study of insects
For additional information browse this web site:
Iowa State Entomolgy Image
Gallery
- 3 pairs of legs (fig. 21-6 --> 21.8)
- method of leg movement
- modifications of legs
- location on thorax
- 2 pairs of wings (pp. 410-411)
(indirect and direct flight muscles)
- distribution (pg. 407)
- adaptability (pg. 407)
- antennae (fig. 21-5)
- mouth parts vs nutrition (fig. 21-16)
- phytophagous
- saprophagous
- predaceous
- parasite
- circulation (fig. 21-13)
- respiration (fig. 21-17)
- excretion (fig. 21-18)
- nervous system
- mechanoreception
- auditory
- chemoreception
- visual
For additional information visit this web site:
View the World through
a Bee's Eye
- reproduction
- dioecious
- internal fertilization
- metamorphosis (figs. 21-21/21-24)
- holometabolus
- hemimetabolus
- diapause
- defenses
- protective coloration
- warning coloration
- mimicry
- behavior/communication
(pheromones)
- tactile
- visual signals
(bioluminescence)
- social behavior
- interaction between insects and humans
View the web sites below for information on mosquitoes and ticks:
Mosquitoes of the Midwestern
US
Ticks
- control of insects
Phylogeny/adaptive radiation (pp. 426-429)
Once you have completed the lesson, you should go to Assignment 21-1.
E-mail Sylvester Allred at
Syl.Allred@nau.edu
Copyright 1997
Northern Arizona University
ALL RIGHTS RESERVED
