The Terrestrial Mandibulates




BIO190: The Class: Terrestrial Mandibulates: Lesson 21

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
1. head and trunk or
2. head, thorax, abdomen
  (appendages attached)
1 pair antennae
respiration
1. gills in aquatic insects
2. 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)
1. method of leg movement
2. modifications of legs
3. 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)
1. phytophagous
2. saprophagous
3. predaceous
4. 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
1. dioecious
2. internal fertilization
metamorphosis (figs. 21-21/21-24)
1. holometabolus
2. hemimetabolus
diapause
defenses
1. protective coloration
2. warning coloration
3. 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