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biology 108 > Lecture 24: Arthropoda I > Flashcards

Lecture 24: Arthropoda I Flashcards

1
Q

Phylum Arthropoda traits

A

Most species-rich phylum of any organism
Open circ system
Segmented
Jointed appendages

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2
Q

Cephalization?

A

Nervous system becomes concentrated towards head.

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3
Q

Tagmatization?

A

Segmented body & jointed appendages arranged into functional units w/ specialized function

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4
Q

Arthropod groups?

A 
Trilobita
Crustacea
Myriapoda
Chelicerata
Hexapoda
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5
Q

Crustacea?

A 
Crabs, lobsters and shrimp
Mostly marine
Compound eyes and two antenna
Cephalothorax
Carapace
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6
Q

Cephalothorax?

A

Head and thorax merged

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7
Q

Carapace

A

Shields lateral and dorsal sides as well as abdomen

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8
Q

Thoracic limbs?

A

Locomotion in crustacean

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9
Q

Abdominal limbs?

A

Filter feeding, carrying eggs, swimming in crustacean

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10
Q

Crustacean exoskeleton is strengthened with?

A

Calcium carbonate

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11
Q

Aquatic crustacea use ___, terrestrial use ___?

A

gills, trachae

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12
Q

Crustacean life?

A

Separate sexes
Variable
Sperm transfer via copulaton

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13
Q

Ecology?

A

Diverse
Some filter feed
Some predatory (feed on fish)
Some are commensals or parasites of vertebrates or invertebrates

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14
Q

Hexapod and myriapod similarities?

A

One pair of antennae
Mandibles
Trachae for gas exchange

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15
Q

Hexapods traits?

A

6 legs

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16
Q

Hexapod morphology?

A 
Head with one pair of antennae
Thorax with 3 pairs of legs
Abdomen
Cerci (segmented appendages)
Compound eyes
some have ocelli (simple eyes)
17
Q

Incomplete metamorphosis?

A

Grasshoppers and dragonflies

Nymphs share morphology of adults but grow wings over time

18
Q

Complete metamorphosis?

A

Wings develop all at once in a pupa

Morphology of adult is different

19
Q

Moulting in hexapods

A

Shedding all ectodermally-derived cuticle

20
Q

Hexapoda sex?

A

Different sexes
Collembolans and apterygote insects transfer sperm indirectly
Pterygotes copulate

21
Q

Importance of hexapods?

A

Polliation
Important decomposers
Predators, herbivores, vectors, and parasites

biology 108 (29 decks)

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