Name: Group:

15

1. seamouse

Aphrodite aculeata

2. Earthworm – Eisenia foetida

4. leech Helobdella

3. Tubifex sp.

Annelida – examples diversity

Polychaeta (1);

Clitellata: leeches (Hirudinea) (2-3) and (Oligochaeta) (4-5).

What are the two types of food of the leeches?

Are earthworms hermaphroditic or gonochoristic? Does their life cycle contain larval stage?

What are the parapodia and what is their function?

Annelida are often a part of parasite life cycles and act as paratenic hosts, what does it mean?

Notes:

Magnification:

5. fish leech Piscicola geometra

Name: Group:

16

Annelida

Clitellata – Oligochaeta

earthworm– Lumbricus sp. – trasverse section

What is the function of typhlosolis?

What type of neural system is present in Annelida?

What is the trochophore?

Notes:

Magnification:

ventral side nephrostom – multicel. ciliated funnel

excretory pore

Scheme of the metanephridia:

vascular plexus

circular

muscle

epidermis

coelom

longitudinal

muscle

ventral neural band

10

00

m

Trochophore

typhlosole

Name: Group:

17

Mollusca

snails and slugs – Gastropoda – Prosobranchiata

Which species is the one most used as a food?

Which species can be dangerous to people?

Which species can be found in Czech republic?

Notes:

true conch – Strombus sp.

limpet – Patella sp.

Murex sp.

cone snail – Conus sp.

abalone – Haliotis sp.

cowry – Cypraea sp.

Ampullaria sp.

river snail – Viviparus sp.

Macroscopic.

Name: Group:

18

Mollusca

Gastropoda – Pulmonata

Is the shell of Helix pomatia coiled to the right (dextral) or left hand (sinistral)?

Which are the freshwater species?

Are there groups of pulmonate snails with shell reducition?

Notes:

Macroscopic.

edible snail – Helix pomatia – morphology of the shell

Ram‘s horn snail

Planorbarius sp.

Cepaea sp.

Lymnaea sp.

growth layers

umbiculus

basal (umbicular) view dorsal (apical) view lateral view

Edible snail - Helix pomatia

Name: Group:

19

Mollusca

Gastropoda – Pulmonata

edible snail – Helix pomatia – internal organs

What is the love dart and how is it used by snails?

Is this snail hermaphrodite or gonochorist?

What type of developement do molluscs go through?

Notes:

Zvětšení: Flask.

veliger

glochidium

Name: Group:

20

Mollusca

Bivalvia

Which species are used as a food?

Which species live in freshwater?

How is done the tight clasp of bivalve shell?

Notes:

river mussel – Unio sp. – morphology of the shell

cockle – Cardium sp.

Anodonta sp.

blue mussel – Mytilus edulis Solen sp.

scallop – Pecten sp.

pen shell – Pinna sp.

Macroscopic.

Name: Group:

21

Mollusca

Cephalopoda

common cuttlefish – Sepia officinalis

Sketch in the fin.

Sketch in the funnel. What is function of the funnel?

Notes:

„cuttlebone“

Name: Group:

22

Mollusca

Cephalopoda

Octopus sp. ; European squid – Loligo vulgaris

Sketch in the fin of the squid.

How many appendages does the squid have? What is their function?

Are octopuses hermaphrodits or gonochorists?

Notes: