Zoology week 3

Question 1

Arthropoda

Answer 1

Metamerism/tagmatisation, chitin exoskeleton, jointed appendages, reduced coelom, hemocoel

Question 2

Trilobitomorpha

Answer 2

subphyla of Arthropoda extinct, 3 longitudinal body segments, biramous appendages

Question 3

Chelicerata

Answer 3

subphyla of arthropoda: 2 tagmata (prosoma and opisthosoma), no antennae, chelicerae and pedipalps

Question 4

merostomata

Answer 4

class within Chelicerata: horshoe crabs

Question 5

Arachnida

Answer 5

class within Chelicerata: carnivorous (partial external digestion), malpigian tubules, book lungs or trachea

Question 6

scorpionida

Answer 6

arachnid order: scorpions, enlarged pedipals, dorsally curved post abdomen with stinger

Question 7

Araneae

Answer 7

arachnid order: spiders, indirect fertilisation with spermatophores and chelicerae with venom glands

Question 8

Opiliones

Answer 8

Arachnid order: harvestmen, direct fertilisation, no separation between tagmata, omnivores

Question 9

Acarina

Answer 9

arachnid order: mites and ticks, ectoparasites

Question 10

Myriapoda

Answer 10

Subphylum, 2 tagmata, damp terrestrial (lacking in wax)

Question 11

Diplopoda

Answer 11

myriapod class: millipedes, 2 pairs of legs per body segment, herbivores

Question 12

Chilopoda

Answer 12

myriapod class: centipedes, 1 pair of legs per segment, predators with venom

Question 13

Crustacea

Answer 13

arthropod subphylum: 2 pairs antennae, biramous appendages

Nauplius larvae in aquatic species which metamorphose into adults

Question 14

Malacostraca

Answer 14

crustacean class: crabs lobsters etc. reduced abdomens to crawl along substrate (aquatic), paired appendages in both body segment, statocysts for orientation

Question 15

Branchiopoda

Answer 15

crustacean class: waterless, freshwater, small and flattened with appendages for locomotion, respiration and feeding

Question 16

maxillopoda

Answer 16

crustacean class: barnacles and krill, 5 head segments, 6 thoracic segments and 4 abdominal segments

Question 17

hexapoda

Answer 17

arthropod subphylum: 3 tagmata, 5 pairs head appendages, 3 legs on thorax

Question 18

entognatha

Answer 18

hexapod class: mouthparts hidden inside head capsules that are not homologous with other groups, ametabolous development

Question 19

Insecta

Answer 19

hexapod class: trachea with closing spiracles, uric acid, non-homologous Malpighian tubules, can me ametabolous or metamorphic (hemimetabolous or holometabolous)

Question 20

Tardigrada

Answer 20

Ecdysozoan phylum: microscopic, coelomate, 8 unjointed legs tipped with setae

Question 21

Onychophora

Answer 21

Ecdysozoan phylum: velvet worms, damp terrestrial, coelomate, unjointed legs and slime glands