Insect Mouthparts Quiz

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Questions and Answers

What are the 5 main mouthparts of an insect?

Labrum, Mandibles, Maxillae, Labium, Hypopharynx

Which of the following is NOT a type of insect mouthpart?

  • Maxillae
  • Palpiger
  • Labrum
  • Antennae (correct)

Match the type of insect mouthpart with its function.

Labrum = Upper lip Mandibles = For chewing and grinding Maxillae = Used for manipulating food and tasting Labium = Lower lip Hypopharynx = Tongue-like structure for tasting and swallowing

Which insect mouthparts are present in both biting and chewing insects and piercing and sucking insects?

<p>Maxillae and Labium (C)</p> Signup and view all the answers

The housefly's mouthparts are classified as biting and chewing.

<p>False (B)</p> Signup and view all the answers

The insect order Hymenoptera, like honeybees, typically have asymmetrical mouthparts with a right mandible absent.

<p>True (A)</p> Signup and view all the answers

Which mouthpart type is used by insects to suck liquid food by using a styletle?

<p>Haustellate (B)</p> Signup and view all the answers

Which of the following insect orders commonly exhibits larva stages known as caterpillars?

<p>Lepidoptera (B)</p> Signup and view all the answers

What type of mouthparts are used by the naiad of a dragonfly ?

<p>Masked (B)</p> Signup and view all the answers

Flashcards

Labrum

The upper lip of an insect, often paired.

Mandibles

The primary jaws of insects, used for chewing and biting. They are usually paired.

Maxillae

The secondary jaws of insects. They assist in handling food and often have sensory palps. They are usually paired.

Labium

The lower lip of an insect, usually composed of several fused segments. It often has sensory palps and helps guide food to the mouth.

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Hypopharynx

A tongue-like structure found in some insects, located inside the mouth. It helps in lapping up liquids and sometimes acts as a sensory organ.

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Biting & Chewing

A type of mouthparts found in insects like grasshoppers and locusts. They are adapted for biting and chewing solid food.

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Piercing & Sucking

A type of mouthparts found in insects like mosquitoes and bugs. They are adapted for piercing through skin or plant tissue and sucking up fluids.

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Sponging

A type of mouthparts found in houseflies. They are adapted for lapping up liquid food. They do not have mandibles.

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Siphoning

A type of mouthparts found in butterflies and moths. They are adapted for sucking up nectar from flowers. They have a long, coiled proboscis.

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Rasping & Sucking

A type of mouthparts found in thrips. They are adapted for scraping and sucking up plant sap. They have an asymmetrical mouth with a reduced mandible.

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Chewing & Lapping

A type of mouthparts found in honey bees. They are adapted for chewing and lapping up nectar and pollen. They have a specialized tongue-like structure called a glossa.

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Caterpillar

The larval stage of a butterfly or moth. It is characterized by a cylindrical body with several pairs of legs and a chewing mouth.

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Grub

The larval stage of a beetle. It is often C-shaped and has a fleshy body with chewing mouthparts.

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Maggot

The larval stage of a fly. It is usually legless and has a soft, cylindrical body with a reduced mouth.

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Naiad

The larval stage of a dragonfly. It is aquatic and has a streamlined body with a distinctive 'masked' mouth structure.

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Nymph

The larval stage of an insect in the order Hemiptera. It shares traits with the adult and often has a sucking mouth.

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Mandibulate

A type of mouthparts found in insects like ants and wasps. They are adapted for biting and chewing solid food.

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Haustella

A type of mouthparts found in insects like aphids and sucking lice. They are adapted for piercing through skin or plant tissue and sucking up fluids. They have a specialized stylet for piercing.

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Study Notes

Mouthparts

  • Mouthparts are structures used for feeding
  • Labrum (upper lip)
  • Mandible (jaw/1st jaw, lower jaw)
  • Maxillae (and lower/false jaw)
  • Labium (lower lip)
  • Hypopharynx (tongue-like structure)

Types of Mouthparts

  • Biting and Chewing:

    • Examples include grasshoppers, locusts, and cockroaches.
  • Piercing and Sucking:

    • Examples include mosquitos and bugs; mouthparts are called stylets
    • Housefly mandibles are absent.
  • Sponging:

  • Example includes houseflies

  • Mouthparts are modified to absorb liquids.

  • Siphoning:

    • Examples include butterflies and moths.
    • Maxillary palps and labia are modified for sucking flower nectar
  • Rasping and Sucking:

    • Examples include thrips
  • Chewing and Lapping:

    • Examples include honeybees
  • Piercing and Sucking: Example includes some beetles

  • Degenerate type:

    • Examples include maggots.
    • The mouthparts are not fully developed
  • Masked type:

    • Examples include naiads of dragonflies
    • The mouthparts are modified for catching prey

Feeding Mechanisms

  • Mandibulate: Solid foods; mandibles are used to crush food.
  • Haustellate: Liquid foods; mouthparts such as stylets for sucking are used to suck up liquids
  • Various larval forms have specific mouthpart modifications.

Larval Forms and Insects

  • Lepidotera: Caterpillars
  • Coleoptera: Grub
  • Diptera: Maggot
  • Odonata: Naiad
  • Hemiptera: Nymph

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