Kingdom Animalia- ARTHROPODA Protostome Coelomate Animals BIO102

Arthropoda

Phylum in which organisms (are):

-aquatic, terrestrial, or aerial

-all bilaterally symmetrical

-all motile as adults

-triploblastic

-coelomate

-protostomes

-exhibit unequal segmentation

-have jointed body and appendages

Bilateral

Symmetry

Motile

Arthropods are ____ as adults.

Triploblastic coelomate protostomes.

Arthropods are classified as ____ ____ ____.

Unequal

What kind of segmentation do arthropods exhibit?

legs

The appendages all arthropods possess are called ________, the number of which varies between subphyla

Pleopods/swimmerettes

Appendages that are present under the abdomen of most aquatic arthropods. (There are two possible names (alphabetical order))

Wings

Appendages present in aerial arthropods, one or two pairs of which exist

Antennae

Appendages present on the heads of some arthropods

Chelicerae

Arthropod mouth parts that are feeding appendages outside of the mouth used to move food closer/inside

Mandibles

Arthropod mouth parts that are a pair of jaws used to mechanically break down food

cephalothorax, abdomen

Arachnids, horseshoe crabs, and crustaceans possess two major body regions called ________________ and ______________. (anterior to posterior order)

Head, Thorax, Abdomen

Insects, centipedes, and millipedes possess three major body regions called _____________, _____________, and _____________. (anterior to posterior order)

exoskeleton

All arthropods possess a(n) _____________ which is an armor-like protective outer covering which is restrictive in regards to growth

chitin

The exoskeleton of arthropods is made of...

Ecdysis

The process involving the removal/shedding of the exoskeleton allowing for growth of the arthropod is called ____________. (also known as molting)

open

Arthropods possess a(n) __________ circulatory system.

leg, habitat, mouth part

The subphyla of phylum Arthropoda are classified based on _______ number, ____________, and which _________ _________developed first embryonically.

Chelicerformes

-8 legs

-mostly terrestrial

-develop chelicerae first embryonically

Arachnids, horseshoe crabs

Subphylum Chelicerformes contains what two types of organisms? (alphabetical order)

Myriapoda

-Many legs

-Terrestrial

-Develop mandibles first embryonically

Centipedes, millipedes

Subphylum Myriapoda contains what two types of organisms? (alphabetical order)

Hexapoda

-6 legs

-terrestrial

-Develop mandibles first embryonically

Insects

Subphylum Hexapoda contains what type of organisms?

Crustacea

-10 legs

-Mostly aquatic

-Develop mandibles first embryonically

Arachnida, Merostomata

The two Classes of subphylum Chelicerformes are... (alphabetical order)

Merostomata

Class ____________:

-Marine

-Chelicerae are exhibited as feeding pinchers outside the mouth

-Horseshoe crabs

-in subphylum Chelicerformes

Feeding pincers outside

What are Class Merostomata’s chelicerae?

Living fossils

What is a defining characteristic of class Merostomata?

Arachnida

Class ____________:

- terrestrial

-Chelicerae are exhibited as fangs used to pierce prey

-Spiders, scorpions, ticks, mites

-in subphylum Chelicerformes

fangs

What are Class Arachnida’s chelicerae?

Chilopoda, Diplopoda

The two Classes of subphylum Myriapoda are... (alphabetical order)

Chilopoda

Class ____________:

-Terrestrial

-Possess one pair of legs per body segment

-Carnivores

-Centipedes

-In subphylum Myriapoda

One

How many pair of legs do class Chilopoda have per body segment?

Carnivores

Class Chilopoda are ____.

Diplopoda

Class ____________:

-terrestrial

-Possess two pairs of legs per body segment

-Herbivores

-Millipedes

Two

How many pair of legs do class Diplopoda have per body segment?

Herbivores

Class Diplopoda are ____.

Insecta

Class ____________:

-Most are capable of flight

-All possess Malpighian tubules

-Many undergo metamorphosis

-only class of Subphyla Hexapoda

Escape predators, search for new food sources, search for new mates

Three advantages of flight in Class Insecta: (alphabetical order)

Malpighian Tubules

Excretory tubules that filter liquid and gaseous waste out of the blood and empty it into the intestine for expulsion out of the anus along with fecal matter. All insects possess these.

Complete metamorphosis

Many insects undergo ____________ ___________, a complete change from larval stage to adult.

Gradual Metamorphosis

Some insects undergo ____________ ____________, where the juvenile looks like the adult, but is smaller in size.

Crustacea

Subphyla ____________ contains crabs, lobsters, crayfish, shrimp, barnacles, etc. Most are aquatic and have 10 legs. (Do not need to know specific classes)

8

How many legs do Subphylum Chelicerformes have?

Many

How many legs do Subphylum Myriapoda have?

6

How many legs do Subphylum Hexapoda have?

10

How many legs do Subphylum Crustacea have?