Topic 14 Flashcards
Superphylum ectidozoa
- most species rich animal group
-they molt
difference between locaphotrochozoans and ectidozoans
ectido- molting
lacaphotrochozoans- lacremental growth
Ecdysis and what is does to cuticle
-Process of molting the cuticle(nonliving) in order to grow
-cuticle sclerolized
layers of cuticle and whats underneath
Epicuticle: surface layer
Exocuticle:outside
Endocuticle:inside
-The epidermis is underneath the cuticle
Phylum nematoda
morphology similar to annelids.
-Moult
-pseudoceolomate
-Eutelic: fixed number of cells reach maturity
-muscles on side(longitudinal) so they can move n shi
medically important
many paracites
Variation in gene + ecological opportunity=
Diversity
Phylum anthropoda
-most species rich
- cephalization
-open circulatory system
-jointed
-segmented body
-schlerotized(CHITIN EXOSKELETON)
Tagmatization
main groups of arthropods
-Chelicerata
-Myriapoda
-Crustacea
-Hexapoda
Subphylum Chelicerata(things in it) AND CHARACTERISTICS
how many legs
what is cephalothorax covered by
how many antenna
how many limbs
horseshoe crabs, spider, scorpions, mites, and relatives
-Lack antenna
-Chelicerae as main mouthparts(venom)
-have 2 main tagma(segments)
cephalothorax(covered by carapase){
-abdomen
-have 4 legs
-have 2 pedipalps
}
tracheae
Subphylum Myriapoda characteristics
diplopod vs chilopod
reduced tagmatta
classes:
diplopoda:herbivorous 2 pairs of legs per segment
Chilopoda:carnivorous, longer legs, 1 pair of legs per segment
Crustacean “Subphylum”
how many antennae
what is cephalothorax covered by
Exoskeleton?
how do they breathe? terrestrial vs aqua
crabs,lobsters, etc
seperate sexes. highly variable morphology
2 pairs of antennae
cephalothorax covered by a carapase’
-mandibles= main mouthparts(single segmented)
breathe through tracheae or gills
similarities between hexapod and myriapod
tracheae
one pair of antennae
mandible
Hexapod
how many segments??
how many legs?
antennae??
1 antennae
6 legs
Tagmatization- 3 segmentation
1. head- 1 antennae
2.thorax- 1 antennae
3.abdomen
Hexapod
how many segments??
how many legs?
antennae??
1 antennae
6 legs
Tagmatization- 3 segmentation
1. head- 1 antennae
2.thorax- 1 antennae
3.abdomen
class insecta(Hexapod) characteristics
how do they see??
what were primative ones like?
cerci:trerminal appendages
Compound eyes
Ocelli: for detecting light
primative lacked wings
most ahve wings as aduts
WINGS ARE A SYNAPOMORPHY
