Exam 2 Flashcards
Arthropoda
Precambrian-Rec
Myriopods, trilobites, crustacea, hexapods
Features of Arthopods
jointed legs: two division on end of leg, biamorous or uniamorous
compound eyes
metamorphosis
body segments
Body segments of arthopods
Head, thorax, abdomen OR
Cephalothorax and abdomen
Antannae, eye, carapice
Chelicerata animals and dates
Ticks, mites, arachnids, scorpions, sea spiders, horseshoe crabs. Cambrian to recent
Horseshoe crabs
c-rec
Eurypterids
O-perm
Spiders and scorpions
S- rec
meryarachne
thought to be a spider, but it was a sea scorpion the size of the head
Crustacea
Barnacles: O-red
Ostrocoda: O-rec; live in extreme conditions
Malacostraca: C- rec, crabs, crayfish, lobsters
Trilobitomorpha
Pc-Perm
Anterior, cephalon, thorax, pygdium, occipital ring, pleura, axial ring, pygdial border, posterior
Hexapoda
S-Rec
Insects
3 segmented parts
wings or no wings
antennae
Chilopoda
1 pair of legs per body seg
flattened
venom- carnivores
15 or more trunk segments
2 antennae/eyes compound
glow in dark
Myriapoda
Milies and Centies- Sil-Rec
Many footed
Elongated body w/many segments
single pair antennae
simple eyes
mandibles
maxillae
sexually dimorphic
nocturnal
Diplopoda
two pairs of legs
rounded bodies
25-100 seg
herbivores
curl into dfensive ball
acid spray, poison
Protists
Everything except prokaryots, animals, fungi, and vascular plants
autotrophs
organisms convert inorganic matter to food
heterotrophs
eat organic debris or other organisms
phytoplankton
obtain energy from photosynthesis, autotrophic
zooplankton
small metazoans that feed on other plankton. heterotrophs
nanoplankton
small, 2-20 microns, major food source of zooplankton
Autotrophic protists
Acritarchs, dinoflagellates, coccolithophores, diatoms
Heterotrphs
formanifera, radiolaria
Acritarchs
bigger, spiky
50-100 um
hollow, projections on exterior
marine phytoplankton
composition: organic material
cyst stages in the life cycle of planktonic algae
great index fossils in early Paleozoic, better in Pc
Pc-rec?
Dinoflagellates
Motile stage
Benthic stage
Sil-rec
eukaryotic
marine phytoplankton
zooxanthellae
organic
red tides, luminescent
similar to architarchs, fresh + marine
algal cysts
tolerant to diff temps/salinities