Phylum
Arthropoda
2 (of 3) 
Subphylum
Crustacea
The following questions will
help you to review the material from the lecture, the laboratory, as
well
as the text.
-
Give examples of animals
found
in the subphylum Crustacea.
-
In what kind of environments
would
you expect to find these kinds of animals?
-
Characterize the subphylum
Crustacea.
How do these animals differ from members of the subphyla
Chelicerata, Myriapoda and Hexapoda?
-
What is meant by biramous
appendages?
What is the significance of this concept in the subphylum Crustacea?
-
What are endopodites and
exopodites?
Are all the appendages of a typical crustacean similar? If not, how
do
they differ from each other?
-
What are the main classes
in this subphylum?
-
Use the class Malacostraca to
illustrate the typical features and life history of the Crustaceans.
-
Describe the external anatomy
of a crayfish. Name all the major body regions as well as types of
appendages.
-
What are the different types
of
appendages used for?
-
What is the evolutionary
significance
of the enormous modification that has occurred in the different
types of
appendages found in this group of animals?
-
How does one distinguish
between
a male and a female crayfish?
-
How does a crayfish differ
from
a crab in terms of overall external anatomy?
-
Label the internal anatomy of
a crayfish. Label major organs and know their function.
-
Describe the digestive system
of a crayfish. What are gastric teeth? How do the digestive glands
aid
digestion in these animals?
-
What do crustaceans feed on?
-
How do these animals perform
gas
exchange?
-
There are several species of
crustaceans
that have become successful on land. How can they survive on
land
if they use gills for gas exchange? Explain.
-
What kind of circulatory
system
do you find in these animals?
-
Briefly describe the nervous
and
sensory system of these animals. How do these animals sense the
world?
-
Describe the molting process
in
a Crustacean. How does the exoskeleton in Crustaceans differ compared
to the subphyla Chelicerata,
Myriapoda and Hexapoda?
-
What kind of excretory system
does a crayfish have? Where in the body is it located?
-
Most crustaceans are
dioecious.
True or false? Explain.
-
What is the role of
planktonic
life stages in the life cycle of these animals?
-
Give examples of different
species
found within the class Malacostraca.
-
Briefly describe the types of
Crustaceans found within the following classes: Malacostraca,
Branchiopoda, and Maxillopoda?
-
What is the ecological
significance
of the copepods?
-
What do copepods feed on?
What
kind of animals feed on copepods?
-
Why are the members of the
subclass
Cirripedia such an extreme example of a Crustacean? How do they
differ
from a "typical" crustacean?
-
Describe a barnacle? How do
they
feed? What do they feed on? How do they reproduce?
-
Describe the life cycle of a
barnacle.
-
How is the life cycle of a
barnacle
similar to the Cnidarian Aurelia (moon jellies)? How is it
different?
-
What is a cyprid? A nauplius?
-
Summarize: What are
the
characteristics of the subphylum Crustacea?
-
Summarize: What are
the
names of the different taxa that you encountered in this section?
Make
a table. Memorize the taxa.
