Arthropod II Flashcards

1
Q

What type of taxon is Crustacea?

A

Paraphyletic

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2
Q

What have Hexapoda evolved from?

A

Crustacean ancestor

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3
Q

Pancrustacea

A

Hexapoda and crustaceans together

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4
Q

When did hexapodes emerge?

A

470 mya

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5
Q

Which two classes of Crustacea are more related to Hexapoda?

A
Cephalocarida (horseshoe shrimp)
Remipedia (class of blind crustacean)
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6
Q

Six major classes of Crustacean

A

Cephalocarida(horseshoe shrimp)
Remipedia

Maxillopoda (crabs, krill, wood lice, barnacles, copepods)
Branchiopoda (fairy shrimp, water fleas)

Ostracoda (seed shrimp)
Maxillopoda (tongue worms, fish lice)

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7
Q

What type of taxon are Maxillopoda (one of the major classes of Crustacea)

A

Polyphyletic

Tongue worms
Fish lice

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8
Q

Cephalocarida

A

Horseshoe shrimp

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9
Q

Remipedia

A

Type of blind crustacean

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10
Q

Malacostraca and Maxillopoda

A
Crabs
Krill
Woodlice
Barnacles
Copepods
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11
Q

Branchiopoda

A

Fairy shrimp

Water fleas

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12
Q

Ostracoda

A

Seed shrimp

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13
Q

Maxillopoda

A

Tongue worms

Fish lice

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14
Q

How many pairs of antennae do crustaceans have?

A

Two

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15
Q

What kind of metamorphosis do crustaceans have? XXX

A

Metamorphosis’s with nauplius larvae

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16
Q

How many body segments do crustaceans have?

A

At least two

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17
Q

Malacostraca

A

Largest class of the six classes of crustaceans with approximately 40k species

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18
Q

Describe the Tagmosis of malastraca

A

Standard head thorax abdomen with appendage son each

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19
Q

What is within the stomach of crustaceans?

A

Gastric mill which is good for grinding food

20
Q

Crustaceans exhibit

A

Lots of diversity in Tagmosis regions, segment numbers and segment fusion

21
Q

Uniramous appendages

A

Single series of segments (articles) attached end to end which are unbranched

22
Q

Biramous appendages

A

Branched Series of segments (articles)

23
Q

Ramus

A

Article branch

24
Q

What type of development do crustaceans use?

A

Both direct and indirect

25
Q

Direct development

A

Hatching with all segments and appendages

26
Q

Indirect development

A

Involves a larval stage

Don’t hatch with all the segments and appendages

27
Q

What variation is there in crustacean development?

A

Larval type
Larval stages
Number of moults

28
Q

What is nauplius larva

A

First planktonic larval form of some crustaceans (and most marine forms)

29
Q

The diversification of Arthropoda is what to insects?

A

Independent

30
Q

How many pairs of legs do Hexapoda generally have?

A

Two pairs on each segment (three segments)

31
Q

How many and what tagmata do Hexapoda have?

A

Abdomen
Thorax
Head

32
Q

What classes does Hexapoda include ?

A

Insecta

Entognatha

33
Q

Entognatha characterisation

A

Concealed mouthpart

Ametabolous development

34
Q

Insecta characterisation

A

Exposed mouthparts

35
Q

Ametabolous development

A

gradual increase in the size of young until adult dimensions are attained.

36
Q

Note to self to draw out the t’axons and learn by images

A

X

37
Q

Stages of hemimetabolous development

A

Egg nymph adult

38
Q

Stages of holometabolous development

A

Egg larva pupa adult

39
Q

Insect diversity statistic

A

200 million insects for every human

40
Q

What type of leg appendage is for walking

A

Cursorial foreleg

41
Q

What type of leg appendage is for jumping

A

Saltatorial leg

42
Q

What type of leg appendage is for digging

A

Fossorial foreleg

43
Q

What type of leg appendage is on a diving beetle

A

Natatorial hind leg

44
Q

What type of leg appendage is for a mantis

A

Raptorial foreleg

45
Q

9 specialisations of insect wings

A
Elytra (beetles)
Membranous (bees - lightweight)
Fringed (thrips) 
Tegmina (grasshopper)
Scaly (butterflies)
Stridulation (crickets)
Leaf like (leaf insects)
Halteres (flies)
Hemelytra (true bugs)
46
Q

Parasitoid

Example

A

Insect who’s larvae live as parasites that kill the host

Wasp and flies