Chapter 19: Phylum Arthropoda, Subphylum : Chelicerata, Class: Arachnida Flashcards Preview

Zoology > Chapter 19: Phylum Arthropoda, Subphylum : Chelicerata, Class: Arachnida > Flashcards

Flashcards in Chapter 19: Phylum Arthropoda, Subphylum : Chelicerata, Class: Arachnida Deck (15)
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1
Q

Most are __ living and more common in __, __ regions

A
  • free, warm, dry
2
Q
  • They are divided into two tagmata: a ___ and an ___.
A

-cephalothorax, abdomen

3
Q
  • The cephalothorax bears a pair of ____, a pair of ____and four pairs of ___.
  • They do not have ___ or ___.
A
  • chelicerae, pedipalps, walking legs

- antennas or mandibles

4
Q

Most are predaceous and have ___, __, __ or ___.

A
  • claws, fangs, poison glands or stingers
5
Q

They have sucking mouthparts which ingest ___ and ___ from bodies of their prey.

A
  • fluids and soft tissue
6
Q

-Spiders have a specialized type of gland called what?

A
  • spinning glands
7
Q
  • A few spiders may have a ___ abdomen which is considered a ___ characteristic
A
  • segmented , primitive
8
Q
  • ___ of males are modified sometimes elaborately for sperm transfer
A
  • pedipalps
9
Q

What type of organisms are found in this class? (4)

A
  • mites, ticks, spiders, scorpions
10
Q

Scorpions first appeared on land in the ___, mites and spiders by the end of the ___ era.

A
  • Silurian

- Palaeozoic Era

11
Q

Most are harmless to humans and provide essential control of ___.

A
  • harmful insects
12
Q
  • Some spiders are ___ and can cause pain or death in humans.
A
  • venomous
13
Q

Ticks may carry ___.

A
  • human diseases
14
Q
  • Mites can be __ pests.
A
  • crop
15
Q

What are the orders of Class Arachnida? (3)

A
  • Araneae ( spiders )
  • Scorpionida (obv)
  • Acari ( ticks and mites)

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