A R T H R O P O D A

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Information about A R T H R O P O D A

Published on March 23, 2009

Author: erinNly

Source: slideshare.net

Description

A brief presentation concerning 3 major classes (subphlyla) within the phylum Arthropoda

The ARTHROPODS

ARTHROPODA=> segmented invertebrates jointed appendages have exoskeleton most numerous AND diverse phylum slow growth (must shed exoskeleton… called “molting”) some have compound eyes (movement) Simple eyes (ocelli)

segmented invertebrates

jointed appendages

have exoskeleton

most numerous AND diverse phylum

slow growth (must shed exoskeleton… called “molting”)

some have compound eyes (movement)

Simple eyes (ocelli)

3 main classes

CRUSTACEA=> 67,000 described species Many consumed by humans – 10,000,000 tons A few are hermaphrodites, but most have separate sexes lobsters, shrimps, crabs, barnacles, pillbugs, daphnia, krill Mostly marine, but a few freshwater and terrestrial 2 body regions: cephalothorax & abdomen

67,000 described species

Many consumed by humans – 10,000,000 tons

A few are hermaphrodites, but most have separate sexes

lobsters, shrimps, crabs, barnacles, pillbugs, daphnia, krill

Mostly marine, but a few freshwater and terrestrial

2 body regions: cephalothorax & abdomen

CRUSTACEA=> APPENDAGES: (sensing, chewing &holding, catching & defense, walking, swimming) Decapods

APPENDAGES: (sensing, chewing &holding, catching & defense, walking, swimming) Decapods

 

Missouri’s crayfish species

 

CRUSTACEA=> GREEN GLAND – regulates salt & water levels in the blood

GREEN GLAND – regulates salt & water levels in the blood

CRUSTACEA=> GREEN GLAND – regulates salt & water levels in the blood barnacles - sessile crustaceans

GREEN GLAND – regulates salt & water levels in the blood

barnacles - sessile crustaceans

hermit crab

 

Caribbean Spiny Lobster

 

Mammalian intellect?

 

 

 

“ cleaner” shrimp

 

isopod on soldierfish

ARACHNIDA=> Phylum: Arthropoda, Class: Arachnida spiders, scorpions, mites, ticks, horseshoe crabs 8 legs, 4 mouthparts (2 pedipalps to hold & chew + 2 fangs (chelicera)

Phylum: Arthropoda,

Class: Arachnida

spiders, scorpions, mites, ticks, horseshoe crabs

8 legs, 4 mouthparts (2 pedipalps to hold & chew + 2 fangs (chelicera)

 

ARACHNIDA=> Phylum: Arthropoda, Class: Arachnida “ book lungs” – modified gills made of folds of tissue that hang below (surface area) “ malpighian tubules” – excretory organs that filter wastes water conservation!

Phylum: Arthropoda,

Class: Arachnida

“ book lungs” – modified gills made of folds of tissue that hang below (surface area)

“ malpighian tubules” – excretory organs that filter wastes

water conservation!

 

 

 

ARACHNIDA=> TICKS & MITES – most all are parasites impt. in transmission of disease Lyme Disease, Rocky Mountain Spotted Fever mites are smaller (dust mites)

TICKS & MITES – most all are parasites

impt. in transmission of disease

Lyme Disease, Rocky Mountain Spotted Fever

mites are smaller (dust mites)

 

 

 

 

 

ARACHNIDA=> SCORPIONS – long, segmented abdomen w/stinger at end 2,000 species pedipalps are modified into claws few are truly dangerous to humans

SCORPIONS – long, segmented abdomen w/stinger at end

2,000 species

pedipalps are modified into claws

few are truly dangerous to humans

ARACHNIDA=> 2 Main body Regions Cephalothorax and abdomen Only truly dangerous scorpion in US is Arizona Bark Scorpion

2 Main body Regions

Cephalothorax and abdomen

Only truly dangerous scorpion in US is Arizona Bark Scorpion

… but this really seems a bit much.

… but this really seems a bit much.

ARACHNIDA=> SPIDERS – “ hunting” spiders have thick, hairy legs and good eyes “ web building” spiders have long, thin legs and poor eyesight

SPIDERS –

“ hunting” spiders have thick, hairy legs and good eyes

“ web building” spiders have long, thin legs and poor eyesight

ARACHNIDA=> SPIDERS – tend to have 8 simple eyes “ web building” spiders have long, thin legs and poor eyesight

SPIDERS –

tend to have 8 simple eyes

“ web building” spiders have long, thin legs and poor eyesight

 

 

ARACHNIDA=> HORSESHOE CRABS – are not crabs ancient, gill-bearing arthropods no malpighian tubules… why would they need them?

HORSESHOE CRABS – are not crabs

ancient, gill-bearing arthropods

no malpighian tubules… why would they need them?

INSECTA=> Phylum: Arthropoda Class: Insecta 75% of all known animal species 1 st to develop flight 1 st to truly use “communication” 3 types: SONIC, VISUAL & CHEMICAL

Phylum: Arthropoda

Class: Insecta

75% of all known animal species

1 st to develop flight

1 st to truly use “communication”

3 types:

SONIC, VISUAL & CHEMICAL

INSECTA=> 3 distinct body regions: HEAD, THORAX & ABDOMEN one pair of antennae one pair of cmpd. eyes (up to 3 simple)

3 distinct body regions:

HEAD, THORAX & ABDOMEN

one pair of antennae

one pair of cmpd. eyes (up to 3 simple)

 

INSECTA=> three pair of mouthparts most have one or two pairs of wings modified exoskeleton

three pair of mouthparts

most have one or two pairs of wings

modified exoskeleton

INSECTA=> RESPIRATION: Trachea - tubes connected to spiracles Spiracles are observable openings on exoskeleton

RESPIRATION:

Trachea - tubes connected to spiracles

Spiracles are observable openings on exoskeleton

INSECTA=> RESPONSE: best sensory systems of all arthropods some have receptors on bottom of feet (taste) compound eyes sensitive antennae

RESPONSE:

best sensory systems of all arthropods

some have receptors on bottom of feet (taste)

compound eyes

sensitive antennae

INSECTA=> DIGESTION & EXCRETION: after gizzard is a midgut and hindgut before the anus Excretion - malpighian tubules

DIGESTION & EXCRETION:

after gizzard is a midgut and hindgut before the anus

Excretion - malpighian tubules

INSECTA=> METAMORPHOSIS: a series of changes in which young insects change into adults Complete metamorphosis Incomplete metamorphosis

METAMORPHOSIS:

a series of changes in which young insects change into adults

Complete metamorphosis

Incomplete metamorphosis

INSECTA=> Complete metamorphosis

Complete metamorphosis

INSECTA=> Incomplete metamorphosis

Incomplete metamorphosis

 

 

 

 

 

Something new you learned Something you still have questions about Information you still Need Something we haven’t covered that you would like to learn about (arthropods)

Something new you learned

Something you still have questions about

Information you still Need

Something we haven’t covered that you would like to learn about (arthropods)

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