Lophotrochozoa (protostomia) Flashcards Preview

BIOL 1030 > Lophotrochozoa (protostomia) > Flashcards

Flashcards in Lophotrochozoa (protostomia) Deck (22):
1

P. Chaetognatha

Arrow worms; predators of marine plankton

Mysterious relation to Protosomia and Ecdysozoa

2

Lophotrochozoa

Do not molt

Grow by extending size of skeleton

3

Ecdysozoa

Molt

4

Platyzoa

Contains P. Platyhelminthes and P. Rotifera

5

P. Ectoprocta

Moss animals

Coelomate

Secrete and live in a chitinous chamber (zoecium)

6

P. Platyhelminthes

"Flatworms"

Acoelomate, no circulatory system, most hermaphroditic

7

P. Rotifera

Pseudocoelmate parasites

Have corona; jaws in pharynx

Hydrostatic skeleton

8

P. Annelida

Segmented worms

Coelomate, hydrostatic skeleton, septa, setae

9

P. Nemertea

Ribbon worms

10

P. Phoronida

Horseshoe worms

Coelmate

Secrete and live in a chitinous tube

11

P. Brachiopoda

Have two calcified shells that superficially resemble clams

Anchored by stalk

12

P. Mollusca

(snails, slugs, clams, oysters, chitons, cuttlefish, etc.)

13

C. Turbellaria

Only free-living flatworms

Use pharynx to feed

Include planaria

14

C. Trematoda

Flukes

15

C. Cestoda

Tapeworms

Scolex - head
Proglottids - hermaphroditic units

16

C. Polychaeta

Polychaetes

More cephalized

Parapodia, separate sexes

17

C. Oligochaeta

Earthworms

Hermaphroditic with clitellum

18

C. Hirudinea

Leeches

Hermaphroditic with clitellum

19

C. Polyplacophora

Chitons

Marine with 8 calcaeous plates for a shell

20

C. Gastropoda

Snails and slugs

Operculum - "door" when it withdraws

21

C. Bivalvia

(clams, oysters, scallops, mussels)

22

C. Cephalopoda

(octopuses, squids, cuttlefish, nautilus, etc.)

0-1 internal or external shells