Arthropod diversity Flashcards
1
Q
two types of eyes in arthropods?
A
- Compound
- ocelli
2
Q
What are ocelli eyes?
A
simple eyes, only one lens, that are not image forming
3
Q
Arthropoda is a ______ group
A
monophyletic
4
Q
arthropods make up ____ of animal species
A
85%
5
Q
What are the 3 subphylum’s under Arthropoda?
A
- Trilobitomorpha
- chelicerata
- mandibulata
6
Q
Defining features under subphylum trilobitomorpha?
A
- 3 tagmata (body regions)
- 3 “lobes” (lateral and central portions of the body
- all extinct
7
Q
What are the defining characteristics of subphylum chelicerata?
A
- no antennae
- 2 body regions/2 tagmata
- chelierae
8
Q
What are chelicerae?
A
- defining characteristic of subphylum chelierata
- pair of mouth parts used for grasping prey and delivering venom
9
Q
3 classes under subphylum chelicerata?
A
- Class Merostomata (Horse shoe crabs)
- Class Arachnida (spiders, scorpions, ticks, mites)
- Class Pycnogonida (sea-spiders)
10
Q
What is class merostomata?
A
- under subphylum chelicerata
- horseshoe crabs
- less than 10 species
- uses their blood in medical testing
11
Q
what is class arachnida?
A
- under subphylum chelicerata
- spiders, scorpions, ticks, mites
- many predators or parasites, all terrestrial
12
Q
What is class pycnogonida?
A
- under subphylum chelicerata
- sea spiders
- all marine with weak tagmatization
