5: Arthropoda part 2 Flashcards
(44 cards)
arthropoda subphylum:
- dominant aquatic
- only arthropod w 2 pairs of antennae
- most have cephalothorax + abdomen
- have mandibles as mouthparts
- exoskeleton reinforced w calcium carbonate
crustacea
the closest related subphylum to insects and other hexapods together form this clade
pancrustacea
- plate that covers cephalothorax
- in some groups covers entire body
- many crustaceans have this
carapace
crustaceans have ___ appendages or 2 branches
biramous
balance organ found in the antennae
statocyst
compound eyes made up of many of this
ommatidia
most diverse crustacean class
malacostraca
malacostraca order:
- only fully terrestrial
- dorsoventrally flattened
- no carapace
- many can roll into ball
Isopoda
malacostraca order:
- lack carapace
- laterally compressed
- typically marine w some beach dwelling, freshwater, parasitic species
Amphipoda
malacostraca order:
- only 90 species but are important as planktonic organisms
- most bioluminescent
- major part of diets of many fish, baleen whales
euphausiacea (krill)
malacostraca order:
- crabs, lobsters, crayfish, “true” shrimp
- 5 pairs of walking legs
- economically important
decapoda
crabs distinguished by 2 things
- broad cephalothorax
- reduced abdomen
the crab body plan evolved multiple times out this “true crabs”
brachyura
the process of non-crab crustaceans independently evolving crab-like forms
carcinization
arthropoda subphylum:
- most numerous
- 6 walking uniramous legs
- 3 tagmata: head, thorax. abdomen
hexapoda
class in hexapoda: bases of the mouthparts enclosed within the head capsule
class entognatha
class in hexapoda:
- largest group of animals
- found in almost every habitat
- only invertebrates capable of flight
- usually 2 pairs attached to thorax
class insecta
hindwings true flies have modified that aid in balance during flight
halteres
study of insects
entomology
simple light-detecting organs
ocelli
butterflies and moths have a coiled ____ for feeding on nectar
proboscis
mouthpart usually tube-like and are adapted for piercing tissue
sucking mouthparts
mouthpart adapted for seizing and crushing food
chewing mouthparts/mandibles
house flies have these mouthparts w a large pair of lobes for consuming liquid food
sponging
