PHYLUM ARTHROPODA

PHYLUM ARTHROPODA

ETYMOLOGY

Gk. “arthros”– joint + “podos”– foot

ETYMOLOGY

Gk. “arthros”– joint + “podos”– foot

• Common throughout marine, freshwater, terrestrial, and even aerial environments

• Body usually segmented and jointed externally (divided into 3 major parts: head, thorax, abdomen) with appendages that are equipped for feeding, sensory reception, defense, and locomotion; with hardened exoskeleton containing chitin and molted at intervals

• Common throughout marine, freshwater, terrestrial, and even aerial environments

• Body usually segmented and jointed externally (divided into 3 major parts: head, thorax, abdomen) with appendages that are equipped for feeding, sensory reception, defense, and locomotion; with hardened exoskeleton containing chitin and molted at intervals

GENERAL CHARACTERISTICSGENERAL CHARACTERISTICS

• Complete digestive tract (mandible-chewing

or proboscis- sucking) with a dorsal heart and a ventral nervous system

• Respiration through gills, trachea, book lungs or body surface

• Sensory organs include antennae and hairs, simple and compound eye

• Reproduces (mostly sexually), one to several larval stage

• Complete digestive tract (mandible-chewing

or proboscis- sucking) with a dorsal heart and a ventral nervous system

• Respiration through gills, trachea, book lungs or body surface

• Sensory organs include antennae and hairs, simple and compound eye

• Reproduces (mostly sexually), one to several larval stage

• The muscle system is more or less assisted by hydraulics originated from the blood pressure created by the heart

• Respiration through gills, trachea, book lungs or body surface

• With open circulatory system. Haemolymph that contains haemocyanin, a copper-based oxygen-carrying protein

• The muscle system is more or less assisted by hydraulics originated from the blood pressure created by the heart

• Respiration through gills, trachea, book lungs or body surface

• With open circulatory system. Haemolymph that contains haemocyanin, a copper-based oxygen-carrying protein

SUBPHYLUM TRILOBITOMORPHA

• CLASS TRILOBITA – Trilobites

SUBPHYLUM CHELICERATA

• CLASS ARACHNIDA – Spiders, Scorpions, Ticks

• CLASS MEROSTOMATA – Horseshoe crabs

• CLASS PYCNOGONIDA – Sea spiders

SUBPHYLUM TRILOBITOMORPHA

• CLASS TRILOBITA – Trilobites

SUBPHYLUM CHELICERATA

• CLASS ARACHNIDA – Spiders, Scorpions, Ticks

• CLASS MEROSTOMATA – Horseshoe crabs

• CLASS PYCNOGONIDA – Sea spiders

REPRESENTATIVE ORGANISMS: Ants, Butterfly, Grasshopper, Beetles, Lobsters,

Spiders etc.

REPRESENTATIVE ORGANISMS: Ants, Butterfly, Grasshopper, Beetles, Lobsters,

Spiders etc.

SUBPHYLUM MARIAPODA

• CLASS CHILOPODA – Centipedes

• CLASS DIPLOPODA - Millipedes

SUBPHYLUM HEXAPODA

• CLASS INSECTA – Insects

SUBPHYLUM CRUSTACEA

• Class Branchiopoda – Brine shrimp

SUBPHYLUM MARIAPODA

• CLASS CHILOPODA – Centipedes

• CLASS DIPLOPODA - Millipedes

SUBPHYLUM HEXAPODA

• CLASS INSECTA – Insects

SUBPHYLUM CRUSTACEA

• Class Branchiopoda – Brine shrimp

• CLASS CEPHALOCARIDA – Horseshoe shrimp

• CLASS MAXILLOPODA – Barnacles, andFish lice

• CLASS MALACOSTRATA – Lobsters, Crabs, and Shrimps

• CLASS CEPHALOCARIDA – Horseshoe shrimp

• CLASS MAXILLOPODA – Barnacles, andFish lice

• CLASS MALACOSTRATA – Lobsters, Crabs, and Shrimps

CLASS CRUSTACEA Lobsters, Crabs and Shrimps

CLASS CRUSTACEA Lobsters, Crabs and Shrimps

American lobster

Homanus americanus

American lobster

Homanus americanus

Blue crabCallinectes

sapidus

Blue crabCallinectes

sapidus

CLASS INSECTAAnts, Beetles and Bugs

CLASS INSECTAAnts, Beetles and Bugs

ORDER HYMENOPTERA

Fire antSolenopsis

invicta

ORDER HYMENOPTERA

Fire antSolenopsis

invicta

ORDER ORTHOPTERAMigrating locust

Locusta migratoria

ORDER ORTHOPTERAMigrating locust

Locusta migratoria

ORDER COLEOPTERAWeevil

ORDER COLEOPTERAWeevil

BeetleBeetle

MAJOR PARTS OF AN INSECTMAJOR PARTS OF AN INSECT

Insects that have piercing and sucking mouthparts are called BUGS while BEETLES are insects distinguished as those having forewings modified into hard wing cases that cover and protect the hind wings and abdomen!

Insects that have piercing and sucking mouthparts are called BUGS while BEETLES are insects distinguished as those having forewings modified into hard wing cases that cover and protect the hind wings and abdomen!

CLASS ARACHNIDA Spiders, Ticks and Scorpions

CLASS ARACHNIDA Spiders, Ticks and Scorpions

Wolf spiderLycosa tarentula

Wolf spiderLycosa tarentula

The Goliath Bird-eating tarantula (Theraphosa

blondi) But can grow as much as 1 ft in diameter!

The Goliath Bird-eating tarantula (Theraphosa

blondi) But can grow as much as 1 ft in diameter!

CLASS MEROSTOMATA Horseshoe crabs

CLASS MEROSTOMATA Horseshoe crabs

CLASS CHILOPODA Centipedes

CLASS CHILOPODA Centipedes

Peruvian GiantPeruvian Giant

CLASS DIPLOPODA Millipedes

CLASS DIPLOPODA Millipedes

Harpaphe haydeniana Harpaphe haydeniana

CLASS TRILOBITA Trilobites

CLASS TRILOBITA Trilobites

LIFE CYCLES OF SOME INSECTS

LIFE CYCLES OF SOME INSECTS

LIFE CYCLE OF A DRAGONFLY(CLASS INSECTA ORDER ODONATA)

LIFE CYCLE OF A DRAGONFLY(CLASS INSECTA ORDER ODONATA)

LIFE CYCLE OF A FRUIT FLY

(CLASS INSECTA ORDER DIPTERA)LIFE CYCLE OF A FRUIT FLY

(CLASS INSECTA ORDER DIPTERA)

LIFE CYCLE OF A BUTTERFLY

(CLASS INSECTA ORDER LEPIDOPTERA)LIFE CYCLE OF A BUTTERFLY

(CLASS INSECTA ORDER LEPIDOPTERA)

(Larva) Caterpillar

(Pupa) Chrysalis

LIFE CYCLE OF A GRASSHOPPER

(CLASS INSECTA ORDER ORTHOPTERA)LIFE CYCLE OF A GRASSHOPPER

(CLASS INSECTA ORDER ORTHOPTERA)

MIMICRY AND CAMOUFLAGEMIMICRY AND CAMOUFLAGE

Mimicry - take on the appearance of (another animal or plant) in order to deter predators

Camouflage - the natural coloring or form of an animal which enables it to blend in with its surroundings

Mimicry - take on the appearance of (another animal or plant) in order to deter predators

Camouflage - the natural coloring or form of an animal which enables it to blend in with its surroundings

ECOLOGICAL IMPORTANCEECOLOGICAL IMPORTANCE

• Serve as food source for both animals and humans

• Aid in the propagation of plant species by means of cross-pollination

• Control the population of some harmful organisms

• Some act as scavengers or saprotrophs

• Serve as food source for both animals and humans

• Aid in the propagation of plant species by means of cross-pollination

• Control the population of some harmful organisms

• Some act as scavengers or saprotrophs