Arthropods Flashcards
Arthropods 5 subphyla
trilobitomorpha, chelicerata, myriopoda, crustacea, hexapoda
Why metamorphosis
because less competition for resources between adults and larvae
Arthropods important things
Metameric and tagmatic, paired jointed appendages, ecdysis with growth, hemocoel, ventral nervous system, metamorphosis, open circulatory system, chitinous exoskeleton
Trilobitomorpha shape
extinct. Flattened body and head, thorax and pygidium. biramous appendages
chelicerata shape
no antennae, anterior prosoma (chelicerae and pedipalps), posterior opisthosoma
Chelicerata 3 classes
merostomata, arachnida, pycnogonida
Merostomata
have telson
pycnogonida
sea spiders
arachnida tubules
malphighian tubules
arachnida mono or diecious
diecious, direct development
Harvesters
oval body shape like daddy long legs
Subphylum myriopoda 2 classes out of 4
diplopoda, chilopoda
Myriopoda appendages
uniramous
Diplopoda
millipedes, 2 per segment, calm
Chilopoda
Centipedes, 1 per segment, mobile predators with claws and venom, sperm web
Subphylum crustacea important stuff
2 pairs antennae, biramous appendages (exopod longer)
Crustacea 3 classes
malacostraca, branchopoda, maxillopoda
Malacostraca body regions
cephalothorax and abdomen
Crayfish appendages
antennae 2 pairs, mandbles, maxillae 2 pairs, maxillipeds 3 pairs, pereopods 5 pairs, pleopods 5 pairs, uropods
Malacostraca circulatory system
open
branchiopoda respiratory appendages
leaflike
Maxillopoda body segments and mono vs dieocious
5 head, 6 thoracis, 4 abdominal, telson, monoecious
Hexapoda tagmata
head, thorax abdomen
Hexapoda classes
insecta
