ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).
Transcript of ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).
![Page 1: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/1.jpg)
ARTHRPPODS
ARTHRPPODSChapter 24Chapter 24
What is Entomology?The study of insects (and their near relatives).
![Page 2: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/2.jpg)
Review of Zoological Nomenclature
Taxonomic Categories
Kingdom - AnimalaePhylum - Arthropoda
Class - InsectaOrder - Coleoptera
Family - ScarabaeidaeGenus - Popillia
Genus & speciesPopillia japonica Newman
![Page 3: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/3.jpg)
Characteristics of the PhylumArthropoda
• Segmented bodies (e.g., head, thorax, abdomen).
• Paired appendages (e.g., legs, antennae) are jointed.
• Chitinous exoskeletion that must be shed.
• Bilateral symmetry.• The nervous system is dorsal (belly)
and the circulatory system is open and ventral (back).
24.1
![Page 4: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/4.jpg)
![Page 5: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/5.jpg)
Arthropod ExoskeletonsArthropod Exoskeletons• Joints are made
of stiff and flexible cuticle to allow movement.
• The exoskeleton is made of many layers of chitin.– hard material
that protects the body
– must be shed in order to grow
• Joints are made of stiff and flexible cuticle to allow movement.
• The exoskeleton is made of many layers of chitin.– hard material
that protects the body
– must be shed in order to grow
![Page 6: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/6.jpg)
Arthropod ClassificationArthropod Classification– Crustaceans—live in oceans,
freshwater streams, and on land
– Crustaceans—live in oceans, freshwater streams, and on land
– Chelicerates—specialized dagger-like
mouthparts
– Chelicerates—specialized dagger-like
mouthparts– Insects—most live on
land, have six legs – Insects—most live on
land, have six legs
– Myriapods—long bodies and many pairs of legs
– Myriapods—long bodies and many pairs of legs
![Page 7: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/7.jpg)
Crustaceans (Marine Arthropods)
Crustaceans (Marine Arthropods)
– two distinct body sections, cephalothorax and abdomen
–one pair of appendages per segment
– two pairs of antennae–exoskeleton–carapace
– two distinct body sections, cephalothorax and abdomen
–one pair of appendages per segment
– two pairs of antennae–exoskeleton–carapace
24.2
![Page 8: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/8.jpg)
Crustacean AppendagesCrustacean Appendages• Crustacean appendages are
used for a variety of functions.– collecting and manipulating food– attracting females– Protection– claws, antennae, walking legs,
swimmerets, and mandibles.
• Crustacean appendages are used for a variety of functions.– collecting and manipulating food– attracting females– Protection– claws, antennae, walking legs,
swimmerets, and mandibles.
![Page 9: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/9.jpg)
Types of Crustaceans. Types of Crustaceans. – Decapods such as lobsters and
crabs have ten legs.– Decapods such as lobsters and
crabs have ten legs.
–Barnacles are sessile filter feeders wrapped in a hard shell.
– Isopods such as pill bugs have flattened bodies and seven pairs of legs.
![Page 10: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/10.jpg)
Chelicerate Arthropod Characters:
• Pincher-like mouthparts - chelicerae
• NO antennae• Two body regions, usually -
cephalothorax & abdomen• Four pairs of legs• Horseshoe crabs and
arachnids are only living groups
poison gland
spinnerets
fangs
24.3
![Page 11: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/11.jpg)
Arachnids are the largest group of chelicerates. Arachnids are the largest group of chelicerates. • There are three major groups of
chelicerates.–horseshoe crabs–sea spiders–arachnids
![Page 12: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/12.jpg)
Arachnids -- SpidersArachnids -- Spiders
• All spiders make silk and produce venom.
• All spiders make silk and produce venom.
![Page 13: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/13.jpg)
MetamorphosisMetamorphosis
CHANGE IN FORM FROM EGG TO ADULT
![Page 14: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/14.jpg)
IncompleteIncompleteINCOMPLETE
METAMORPHOUS
Insects change shape gradually!
![Page 15: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/15.jpg)
CompleteMetamorphosis
Four stages that all look different
![Page 16: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/16.jpg)
Insects with Complete Metamorphosis
Insects with Complete Metamorphosis
• beetles• bees, ants, wasps• Flies• butterflies
• beetles• bees, ants, wasps• Flies• butterflies
EGG LARVA PUPA ADULT
![Page 17: ARTHRPPODS Chapter 24 What is Entomology? The study of insects (and their near relatives).](https://reader036.fdocuments.in/reader036/viewer/2022062409/5697bf7b1a28abf838c83cba/html5/thumbnails/17.jpg)
Insects with Incomplete Metamorphosis
Insects with Incomplete Metamorphosis
• fleas• grasshoppers &
crickets
• fleas• grasshoppers &
crickets
EGG NYMPH ADULT
Wings NOT fully
developed