Arthropod II Flashcards
What type of taxon is Crustacea?
Paraphyletic
What have Hexapoda evolved from?
Crustacean ancestor
Pancrustacea
Hexapoda and crustaceans together
When did hexapodes emerge?
470 mya
Which two classes of Crustacea are more related to Hexapoda?
Cephalocarida (horseshoe shrimp) Remipedia (class of blind crustacean)
Six major classes of Crustacean
Cephalocarida(horseshoe shrimp)
Remipedia
Maxillopoda (crabs, krill, wood lice, barnacles, copepods)
Branchiopoda (fairy shrimp, water fleas)
Ostracoda (seed shrimp)
Maxillopoda (tongue worms, fish lice)
What type of taxon are Maxillopoda (one of the major classes of Crustacea)
Polyphyletic
Tongue worms
Fish lice
Cephalocarida
Horseshoe shrimp
Remipedia
Type of blind crustacean
Malacostraca and Maxillopoda
Crabs Krill Woodlice Barnacles Copepods
Branchiopoda
Fairy shrimp
Water fleas
Ostracoda
Seed shrimp
Maxillopoda
Tongue worms
Fish lice
How many pairs of antennae do crustaceans have?
Two
What kind of metamorphosis do crustaceans have? XXX
Metamorphosis’s with nauplius larvae
How many body segments do crustaceans have?
At least two
Malacostraca
Largest class of the six classes of crustaceans with approximately 40k species
Describe the Tagmosis of malastraca
Standard head thorax abdomen with appendage son each