Lab 6: Arthropoda 1 Flashcards
when did subphylum tribolita go extinct
Permian
3 longitudinal sections of Trilobites dorsal shield
axial lobe and 2 lateral ones
three transverse parts of Trilobites shields
- cephalon
- thorax
- pygidium
what type of appendages do Trilobites have
biramous (2-branched)
do chelicerates have antennae?
no
what two types of appendages are specific to the chelicerata
- pedipalps
- chelicerae
two body regions of chelicerates
- cephalothorax (prosoma)
- abdomen (opisthoma)
eurypterida lasted from the ? to the ? period
Ordovician, Permian
how many eyes on a xyphosura and how many are visible
9, 2
xyphosura telson is like a
tail
pycnogonida are sea
“spiders”
pycnogonida mouth location
on the proboscis
carapace
prosoma covering on an arachnid
arachnida eye type
simple
what are the claws in order scorpiones
pedipalps
pectines
comb-like structures on the ventral side of a scorpion posterior to the legs
pectines funct
detect ground vibrations prod by prey
what are aranea (spider) fangs
chelicerae
pedicel
stalk like structure connecting the prosoma and opisthosoma
how do male spiders transfer sperm
pedipalps
what do spiders use to draw their liquid food in
pumping stomach
what is the name for an acari head
gnathosoma
what bears the legs on an acari
idiosoma
acari resp
tracheal resp system
pseudoscorpiones differences (3)
- small
- broad opisthosoma
- lack a sting(er)
2 diffs btwn a harvestman and a spider
- no pedicel btwn the prosoma and the opisthosoma
- extremely long legs that carry body high above substrate
how do harvestmen deter predators
repugnatorial glands
solpugida/solifuges defining characteristics (2)
- huge forward pointing chelicerae like jaws
- leg like pedipalps with suckers
myriapoda incl
millipedes and centipedes
chilopods have appendages on the first trunk segment called
poison fangs
centipede legs (2)
- splayed out
- one per segment
millipede legs
2 per segmet
gnathochilarium
a part of a millipede on its head
millipede exoskeleton material
CaCO3
2 smelly substances of diplopoda
- repugnant substances to scare away predators
- noxious vapours
ametabolous metamorphosis
immature instars differ from the adults only in size and development of the gonads and external genitalia
hemimetabolous meta
young nymphs that lack gonads, external genitalia, and wings
holometabolous meta
immature instars completely different than the adults (larvae -> pupa -> adult)
what are mandibulate mouthparts in hexapods for
chewing solid matter
haustellate mouthparts funct
sucking
fat body in an orthopteran
white-coloured blobs floating inside the haemocoel
elytra
protective structures adapted from forewings in beetles
what type of development do beetles and lepidopterans have
holometabolous
what do lepidopterans feed with
rolled up proboscis
flies have how many wings
2
what is the second set of wings in flies replaced with
halteres, counterweights
what type of development do orthoperta and odonata and true bugs have?
hemimetabolous
what type of development do silverfish have
ametabolous
