Arthropod diversity 2 Flashcards
(19 cards)
What are the three superclasses under subphylum mandibulata?
- myriapoda
- hexapoda
- crustacea
What are the defining characteristics of subphylum mandibulata?
- mandibles (pair of mouthparts on 3rd head segment)
- 8 retinular eyes in compound eye
Classificatioon of subphylum mandibulata are based on ……
number and arrangement of appendages
the superclasses under Mandibulata’s appendages can be….
- branched (Crustaceans)
- unbranched (hexapods and myriapods)
what is superclass myriapoda?
- under subphylum Mandibulata
- low degree of tagmatization with many legs
- unwaxed cuticle, stay in moist environments to present dessication
- poor vision
- 2 major orders
What are the two orders under superclass Myriapoda?
Order Chilopoda (centipedes)
Order Diplopoda (Millipedes)
orders under superclass myriapoda are distinguished based on:
- legs per segment
- trophic level
- locomotory ability
Differences between Order Chilopoda (centipedes) and Order Diplopoda (Millipedes)
Centipedes: 1 leg per segment, predators, very fast
millipedes: 2 legs per segment, herbivores/detritovores, slow
What is superclass hexapoda?
- under subphylum Mandibulata
- 6 legs and 3 body regions
- ## legs all located on thorax
two classes under superclass hexapoda are distinguished on …
- mouthpart position
- abdominal appendages
- cuticle and gas exchange
What are the two classes under superclass Hexapoda?
class enthognatha and class insecta
why are class insecta restricted to small size?
- because the surface area of the trachea makes them vulnerable to water loss, and the trachea is relied on for oxygen, their size is restricted
defining characteristics of class insecta?
- labium (lower lip)
- loss of abdominal appendages
class _____ were the first to evolve powered flight
INSECTA
what is superclass crustacea?
- under subphylum Mandibulata
- 5 pairs of appendages (2 pairs antennae, 3 pairs of mouth parts)
- nauplius larva
What are the 6 major classes under superclass crustacea?
- malacostraca
- branchiopoda
- ostracoda
- copepoda
- pentastomida
- cirripedia
examples of class malacostraca?
- mantis shrimp, krill, isopods, lobsters
defining characteristics of class oentastomida?
- exclusively parasitic
- 2 pairs of appendages
defining characteristics of class cirripedia?
- sessile as adults
- body withdrawn inside exoskeleton
- cirri
- no abdomen
- ‘upsidedown’ crustaceans
