Biology - Unit 2: Protostomes

Porifera

Sponges

Ctenophora

Ctenophores

Cnidaria

Jellyfish, sea anemones, hydras, box jelly fish

Rotifera

Rotifer

Platyhelminthes

Flatworms

Annelida

Annelids

Mollusca

Molluscs

Nematoda

Round worms

Tardigrada

Tardigrades; water bears

Onychophora

Velvet worms

Arthropoda

Arthropods

Who am I?

Demospongiae

Who am I?

Hexactinellida

Choanocytes

1. Line the interior of sponges

2. Contain a central flagellum, or cilium, surrounded by a collar of microvilli

3. Make up the choanoderm

Amebocyte

Motile cells found in sponges; have varied functions

Ostium

Pores on the body that allow water to enter the sponge

Mesohyl

Gelatinous matrix within a sponge

Spicule

Stiff spike of silica or calcium carbonate that provides structural support in the body of many sponges

What am I?

Scyphozoa

What am I?

Hydrozoa

What am I?

Anthozoa

What am I?

Cubozoa

Nematocyst

Barbed Organelle

Cnidocyte

Stinging cell

Hydrazoa (Class)

Hydrazoans, siphonophores; polyp dominates

Scyphozoa (Class)

True jellyfish; medusa dominates

Cubozoa (Class)

Box jellies; medusa dominates

Anthozoa (Class)

Sea anemones, corals, sea pens; only polyp

Medusa

The free-floating stage in the life cycle of some cnidarians

Polyp

The immotile (sessile) stage in the life cycle of some cnidarians

Cilia

Filamentous projections; used to move the cell as well as to circulate fluid or particles around the surface of a stationary cell

Lophotrochozoans (Lineage)

Protostomes that grow by extending their skeletons; have a lophophore and/or trochophore

Ecdysozoans (Lineage)

Protostomes that grow by shedding their exoskeleton or cuticle

Trochophore

ciliated larvae

Lophophore

specialized feeding structure

What am I?

Rotifera (Phylum)

Corona

Ring of cilia around the mouth

What am I?

Turbellaria/Planaria

What am I?

Cestoda/Tapeworm

What am I?

Trematoda/Fluke

Turbellaria: Parasitic?

No

Cestoda: Parasitic?

Yes

Trematoda: Parasitic?

Yes?

What am I?

Polychaetes/Marine worm

What am I?

Oligochaetes/Earth worm

What am I?

Hirudinea/Leech

What am I?

Polyplacophora/Chiton

What am I?

Bivalvia/Bivalves

What am I?

Gastropoda/Snails & slugs

What am I?

Cephalopoda/Octopus, squid, nautiluses & cuttlefish

Polyplacophora: Radula?

Yes

Bivalvia: Radula?

No

Gastropoda: Radula?

Yes

Cephalopoda: Radula?

Yes

Scolex

Head of a tapeworm that has hooks, suckers, or both

Proglottid

Segment of a tapeworm

Foot

Of a mollusc: a muscular appendage, used for movements such as crawling and/or burrowing into sediment

Mantle

Of a mollusc: the thick outer tissue that protects the visceral mass and may secrete a calcium carbonate shell

Visceral mass

Of a mollusc: contains most of the internal organs and external gill

Chaetae

Bristle-like extensions found in some annelids

Radula

A rasping feeding appendage in some molluscs

Cloaca

a body cavity into which the urinary, gastrointestinal, and reproductive tracts all empty

What am I?

Nematoda/Roundworm

What am I?

Onychophora/Velvet worm

What am I?

Tardigrada/Water bears

What am I?

Trilobite

What am I?

Diplopoda/Millipede

What am I?

Chilopoda/Centipede

What am I?

Araeneae/Spider

What am I?

Xiposura/Horseshoe crab

What am I?

Acari/Ticks & mites

What am I?

Scropion

What am I?

Malacostraca/Crabs & lobsters

What am I?

Branchiopoda/Brine shrimp

What am I?

Remipedia

What am I?

Maxillopoda/Barnacle

A

Antenna

B

Spiracle

C

Head

D

Thorax

E

Abdomen

F

Ovipositor

A

Telson

B

Swimmerets

C

Walking legs

D

Cheliped

E

Cephalothorax

F

Abdomen

A

Lophotrochozoa

B

Rotifera

C

Platyhelminthes

D

Annelida

E

Mollusca

G

Ecdysozoa

H

Nematoda

I

Tardigrada

J

Onychophora

K

Arthropoda

L

Protostomes

Tagmata

Prominent body regions in arthropods