Characteristics of phyla and classes

Question 1

Platyhelminthes

Answer 1

many not segmented, incomplete gut, rhabdite cells, worm like (tricladia, trematoda, planaria)

Question 2

Trematoda

Answer 2

All parasitic, nutrition through absorption, contains schistosoma - blood fluke)

Question 3

turbellaria / planaria

Answer 3

free living class of platyhelminthes, as opposed to parasitic, mostly aquatic

Question 4

cestoidia

Answer 4

tapeworms, repeated units of proglottids (this is NOT the same as segmentation)

Question 5

Rotifera

Answer 5

aquatic, ciliated corona, has jaw structures called trophi

Question 6

Ectoprocta aka Bryozoa

Answer 6

Moss animals, aquatic and live in colonies, have lophophora, sessile with some CaCo3 skeletons

Question 7

Brachipoda

Answer 7

aquatic, lophophore, has CaCo3 shell, brachiopods have a groove in their shell which is different from bivalves

Question 8

Mollusca

Answer 8

mantle covers visceral mass, many with CaCO3 shells, has a coelom, radula

Question 9

polyplaophora

Answer 9

many plates. (yes that’s it)

Question 10

Gastropodia

Answer 10

coiled shell, univalve, exhibit torsion, (stomach-foot is translation if that helps)

Question 10

Cephalopda

Answer 10

tentacles modified from feet, has radula and a chitin beak, uses jet propulsion for movement

Question 11

bivalvia

Answer 11

has 2 valves or halves, SAF bilateral symmetry, filter and pedal feeders, many have parasitic glochidia larva

Question 12

Annelida

Answer 12

“segmented worms” , displays metamerism, have flexible support and efficient movement, have a coelom, paired epidermal setae (in some), clitellum in some

Question 13

Hirudinea

Answer 13

Leeches, have 34 segments, have anterior and posterior suckers

Question 14

oligochaeta

Answer 14

Few setae, clitellum

Question 15

polychaeta

Answer 15

parapodia with setae, some sessile, some predatory, trochophore larvae

Question 16

Ecdysozoa

Answer 16

have multi-layer cuticle (ectoderm exoskeleton) - performs ecdysis

Question 17

Nematoda

Answer 17

Free-living, parasitic, psuedocolomate, not segmented

Question 18

Tardigrada

Answer 18

psuedocolomate, four pairs of UNJOINTED appendages

Question 19

Nematomorpha

Answer 19

free living and parasitic, infects insects, must return to water (and explode out of a mantis butthole)

Question 20

Arthropoda

Answer 20

probably first aquatic organism to be on land, segmentation AND tagmatization, chitonous exoskeleton, epicuticle, procuticle, JOINTED appendages (uniramous or biramous)

Question 21

Myriapodia

Answer 21

many legs, 1 set antennae, contains diplopoda (2 pairs per segment), and Chilopoda (one pair per segment) C = cent .

Question 22

Trilobitomorpha

Answer 22

marine, extinct, inner lobe for mobility, outer lobe for respiration

Question 23

Chelicerata

Answer 23

two tagmata, 4 pairs of walking legs (contains arachnida, and merostomata (horseshoe crab)

Question 24

Crustacea

Answer 24

two pair of antennae, biramous appendages, pair of mandibles (Contains branchiopoda (fairy shrimp) and maxillopoda ( barnacles and copepods as well as malacostraca )

Question 25

Hexapoda

Answer 25

uniramous appendage, one pair of antenna, 3 pairs of walking legs, a pair of mandibles

Question 26

Chaetognatha

Answer 26

protostome that is neither lophophore or exdysozoa, marine, is zooplankton. akak arrow worm.