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Zoology 2040 > Ch. 13: Arthropods > Flashcards

Ch. 13: Arthropods Flashcards

1
Q

Body symmetry

A

Bilateral

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2
Q

Are they diploblastic or triploblastic?

A

Triploblastic

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3
Q

Divided regions of the body are called

A

Tagmata

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4
Q

4 main innovations

A
  1. Appendages: flexible, jointed
  2. Exoskeleton: cuticle
  3. Reduced coelom: no hydrostatic skeleton
  4. Growth by molting: way to grow with endoskeleton
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5
Q

Digestive system

A

Complete

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6
Q

Circulatory system

A

Open; hemocoel

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7
Q

Excretory system

A

Insects: Malphigian tubes
Spiders: Coxal glands
Crustaceans: Green glands

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8
Q

Subphylum’s of Arthropoda

A
  1. Subphylum Chelicerata

2. Subphylum Crustacea

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9
Q

Subphylum Chelicerate

A
  • Cephalothorax (head + thorax)
  • 6 pairs of appendages
  • 1st pair: chelicerae 2nd pair: pedipalps
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10
Q

Classes in Subphylum Chelicerate

A
  1. Class Merostomata
  2. Class Picnogonida
  3. Class Arachnida
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11
Q

Class Merostomata

A

Phylum Arthropoda; Subphylum Chelicerata

  • Horseshoe crab
  • Large carapace
  • Abdomen with telson
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12
Q

Class Picnogonida

A

Phylum Arthropoda; Subphylum Chelicerata

  • Sea spiders
  • Elongated cephalothorax
  • Reduced abdomen
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13
Q

Class Arachnida

A

Phylum Arthropoda; Subphylum Chelicerata

- Spiders, scorpions, mites, ticks

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14
Q

Spiders

A

Class Arachnida

- Narrow waist

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15
Q

Scorpions

A

Class Arachnida

- Terminal stinger

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16
Q

Subphylum Crustacea

A
  • Biramous appendages
  • Pairs 1+2: antennae
  • Pair 3-5: mandibles + maxillae
17
Q

Classes in Subphylum Crustacea

A
  1. Branchiopoda
  2. Ostracoda
  3. Copoda
  4. Cirripedia
  5. Malacostraca
18
Q

Class Branchiopoda

A

Phylum Arthropoda; Subphylum Crustacea

- Shrimp

19
Q

Class Ostracoda

A

Phylum Arthropoda; Subphylum Crustacea

- Seed shrimp

20
Q

Class Copoda

A

Phylum Arthropoda; Subphylum Crustacea

- Zooplankton

21
Q

Class Cirripedia

A

Phylum Arthropoda; Subphylum Crustacea

- Barnacles

22
Q

Class Malacostraca

A

Phylum Arthropoda; Subphylum Crustacea

  • Crabs, crayfish, shrimp
  • 5 pairs of walking legs
  • Eggs brooded in most
23
Q

Subphylum Hexapoda

A

Phylum Arthropoda

  • six legs
  • 3 tagmata: head, thorax, abdomen
  • 1 pair antennae
  • Mandibles, maxillae
24
Q

Ametabolous

A

No metamorphosis

  • Insect emerges from egg looking like adult
  • Adults are wingless
25
Q

Hemimetabolous

A

Incomplete metamorphosis

  • Egg, nymph, adult
  • Very young lack wings
  • Adults have full wings
    e. g. grasshopper
26
Q

Holometabolous

A

Complete metamorphosis

  • Egg, larva, pupa, adult
    e. g. butterflies, bees
27
Q

Adaptations of insects

A
  1. Avoidance of desiccation: waxy cuticle, excretion of uric acid
  2. High mobility
  3. Small in size
  4. Mouthparts: allows for different feeding

Zoology 2040 (15 decks)

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