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