Flashcards in Phylum Anthropoda Deck (80):
What is the largest phylum in animal kingdom
Sophisticated sense organs
Characteristics of crustaceans
What are Anthropods skeletons made of?
Can be tough or soft and flexible
Relatively impermeable to water
Flexible enough in joints to allow movement
What are the exoskeleton drawbacks?
Relatively heavy and it doesn't grow with the animal so the animal must molt
What happens during Ecdysis?
When the exoskeleton is ready, the animal contracts muscles and takes in air and water.
Animal swells until old exoskeleton splits usually along back
What is Ecdysis controlled and initiated by?
Controlled by hormones produced in the head
Initiated by changes in the environment
What are the 3 sections of the crustacean?
Sometimes the head and thorax fuse to form
How many pairs of walking legs?
What are the shorter antennas called?
Anthropods have extensive cephalization...
Antennae detect changes
How do Anthropods respirate
Gills, tracheal system, book gills
What does the Anthropod nervous system contain?
Double ventral nerve cord
Ganglia (control center for body)
Anthropods have what kind of circulatory system?
Body fluid is called
Anthropods have complete digestive tract that includes
Mouth, stomach, intestine, anus, and mandible
Mandibles open from
Side to side
What is the reproductive system like in Anthropods?
They are dioecious, they have internal fertilization, ostracods and Branchiopoda reproduce by parthenogenesis (eggs develop without sperm)
Subphylum Crustacea includes
Crabs, lobsters, etc.
Marine, freshwater and terrestrial
2 pairs of antennae
What are the classes within Crustacea?
Barnacles and Copepods
Crabs, lobster, shrimp, krill
Have flexible body plan that allows them to live in all biomes.
What are Copepods
Microscopic planktonic organisms
Important part of food web
Cause problems to ships by increasing drag
Largest group of crustaceans
Usually 8 legs, first 2 used for feeding
2 chambered stomach
Crabs lobster shrimp
5 pairs of walking legs
First pair is modified to form chelipeds which catch prey and defend animal
Shrimp like animals that are filter feeders and feed on zooplankton
Most species are bioluminescent
Found on bottoms
On land known as pill bugs
9 marine species
Contains 2 segments (cephalothorax and abdomen)
Contains only 4 species
Horseshoe crab more closely related to spiders than crabs
The blood is blue because it has cooper
Has enzyme which release a natural antibiotic to fight bacteria
Blood used to detect bacteria in medical supplies and drugs
Can't spin webs
Contains 4-6 pairs of legs
1300 known species
The process of fusion of the body regions in Anthropods
Class for horseshoe crab
The most important order of crustaceans for human
Which cell layer secretes the exoskeleton of crustaceans
Which body region of lobster do humans eat
What do you call the first pair of appendages on a horseshoe crab
Horseshoe crabs use this to turn themselves over and for defense
Head and thorax fused
To what body region are the legs of Decapoda attached
Fused specialized body regions in Arthropoda
Which organisms feed with a large suctorial proboscis?
Molting occurs most frequently during what life cycle?
Horseshoe crab respiratory organs are called
The exoskeleton of crustaceans is composed of this material
Chambers filled with fluid and lined with sensitive hairs that help with balance and equilibrium
Most female crustaceans brood their fertilized eggs on what body region?
The hard outer cuticle which covers and protects the body of a decapod
What is the first larval form for most crustaceans called
The ability of crustaceans to release an injured appendage
Structured with which barnacles feed
Larval stage of barnacle
Excretory and osmotegulatory organs located on the head of the crayfish
Subclass of Copepods
Subclass for barnacles
Which pair of mouth parts are jawed feet that situate and hold the food in front of the mouth
This part of the crayfishes stomach has calcareous teeth which grind food particles
The most common type of reproductive strategy used by crustaceans
Sexual external fertilization
This pair of mouth parts actually crush and grind the food so are involved in the actual ingestion
The two types of barnacles are stalked and
The abdominal appendages of lost crustaceans are used to carry eggs
Which of these is also called a decorator crab
The order in which the blue crab is found
The only pelagic Decapoda
When do shrimp typically migrate to the surface to feed
Evening and predawn
Crustaceans consume their cast off exoskeleton much of the time for needed protein and calcium carbonate
Barnacles are always sessile
Has an oversized claw used for combat or courtship display
All crabs are aquatic
The most powerful and agile swimmers of all marine crustaceans
Inhabit abandoned Gastropoda shells
Spiny lobster are protected from April to the end of July