Name, group

48

Sketch of a brittle star:

Sea star

Phylum: Echinodermata Classes: sea stars Asteroidea / brittle stars Ophiuroidea /

Echinoidea - sea urchins

Sketch in the brittle star. Note and write down differences between brittle and sea

stars.

A madrepore is visible on the dorsal side of a sea-star. It is a peroforated wart-

resembling plate. Mark it on the picture. What is its function?

Where is „Aristotles lantern“ situated? What is its function?

What is ambulacral system and how does it work?

Macroskopic.

Name, group

49

Phylum: ............................................. Subphylum: Tunicata

Classes: Ascidiacea – sea squirts / Thaliacea – salps

What phyllum do Sea sqiurts and Thaliaceans belong to?

What is the way of life of Tunicates?

Notes:

Macroskopic

Name, group

50

Phylum: Chordata; Subphylum: Vertebrata

Class: Petromyzontida – lampreys

sea lamprey – Petromyzon marinus

Sketch in the mouth.What is the food of marine lamprey?

How many gill slits have lampreys?

What is the anadromous migration observed in many lampreys (including the marine)?

Notes:

Macroskopic

Name, group

51

Phylum: Chordata; Subphylum: Vertebrata

Class: Chondrichthyes cartilaginous fish

Subclass: Elasmobranchii – containig sharks&rays

Sketch in the gill slits and fins of a shark. Name the fins (dorsal, pectoral, anal, pelvic,

caudal).

What is the name of opening behind the eye and what is its function?

The scales of sharks are homologic to teeth, what is the name of this type of scales?

Notes:

Macroscopic

Name, group

52

Typical fish vertebrae (concave from both sides)

Phylum: Chordata; Subphylum: Vertebrata

Class: Actinopterygii ray-finned fishes

Subclass: Chondrostei; sterlet – Acipenser ruthenus

Sketch in the caudal fin of sterlet, name the fins. What is the type of caudal fin in

sturgeons?

Sketch in the mouth, in what position to the head is it? Where do sturgeons feed and

what is their main food?

Notes:

Macroscopic

caudal fins: difycercous, heterocercous, homocercous

Name, group

53

Phylum: Chordata; Subphylum: Vertebrata

Class: Actinopterygii ray-finned fishes Subclass: Neopterygii

Try to identify the species of fish and put them in correct taxonomical orders.

zander (Sander lucioperca), sole fish (Solea sp.), pipefish (Syngnathus sp.), seahorse

(Hippocampus sp.), perch (Perca fluviatilis), catfish (Silurus glandis), pike (Esox lucius),

Orders:

Perciformes: Pleuronectiformes: Beloniformes:

Syngnathiformes: Esociformes: Siluriformes:

What is the direction of reproductive migration

of eels?

What order(s) is typical by having ctenoid scales?

.

cycloid ctenoid scale

Name, group

54

Phylum: Chordata; Subphylum: Vertebrata

Class: Actinopterygii ray-finned fishes Subclass: Neopterygii

Identify shown species and put them in correct orders. What zoogeographic regions are

the species from?

Name 3 other common aquarium fish species. What is their zoogeographic

distribution?

Some fish are viviparous, what organ is used for internal fertilisation?

Notes:

Name, group

55 Simplified illustratory key for identification of common genera and species

of freshwater fishes in central Europe

1 No pair fins present. Mouth in adults is cylindric, jaws not present, covered with

keratinous denticles, larval mouth is horseshoe-shaped. 7 circular gill openings, no

scales covering the

body....................................…………………..........................................lampreys

– Pair fins and jaws present. One pair of gill opening ......……….ray finned fishes…2

2(1) Caudal fin heterocecrous (the upper lobe larger than lower). Body partially covered

by 5 rows of flatt rhomboid bone scales………………...Chondrostei – sturgeons

– Caudal fin homocercous. Body covered by scales or naked

skin.....................................................................................................…...Teleostei…3

3(2) Small adipose fin present on the dorsum, in between the dorsal and caudal fin........4

– No adiposal fin present.................….......…………………………..............………..7

4(3) 4 long barbels present, no scales......................bullhead (Ameiurus spp.) introduced,

invasive species

– No barbels ......................…………………………………………...............………..5

5(4) Dorsal fin long, with at least 17 rays …………… Grayling (Thymallus thymallus)

– Dorsal fin short with maximum of rays reaching 16...............................................…6

6(5) whole body surface (including the fins) densely covered by black dots .....................

.……………………….. rainbow trout (Oncorhynchus mykiss) introduced, farmed

– Body covered by both black and red dots, no dots on the caudal fin ..........................

……………………………………...................... brown trout (Salmo trutta)

7(3) No ventral fins. Body snakelike. Very long dorsal and anal fins and reduced caudal

fin from a continuous hem…..................................european eel (Anguilla anguilla)

– Ventral side of body having odd anal fin, paired ventral and pectoral fins.........……8

8(7) Odd barbel under mouth. Ventral fins positioned anteriorly to pectoral. Both dorsal

and anal fin very long.……….. burbot (Lota lota) freshwater relative of codfishes

– No odd barbels. Ventral fins behind pectorals........................................................….9

9(8) Anteriorly to the dorsal fin are 2-3 or more sharp bony rays not interconnected with

the dorsal fin ..............………………………...stickleback (Gasterosteus aculeatus)

– No loose, sharp, bony rays on the dorsum .…………………………........……….. 10

10(9) Two dorsal fins. Ventral fins at the same level as pectoral, or only little bit more

posteriorly positioned. ....………………………………………………………..... 11

– One dorsal fin, with at most 3 hard bony rays. Ventral fins far away from pectorals.

.................…………………………………………………………………………. 12

11(10) Both dorsal fins and the caudal fin covered by small dark spots...............................

……………………………………..............………....... zander (Sander lucioperca)

– No dark spots on dorsal and caudal fins, but one black mark at the end of 1st dorsal

fin. ……………………………………..............…... yellow perch (Perca fluviatilis)

Name, group

56

12(10) Anal fin very long, 77 up to 92 rays, in contact with round caudal fin. Tiny dorsal

fin, 2 long barbels on upper jaw, 4 shorter barbels on lower jaw. ................................

..................................................................................... wels catfish (Silurus glanis)

– Anal fin consistingo of less than 70 rays......................…………………..……….. 13

13(12) Dorsal fin at the same level as anal fin, head flattened…northern pike (Esox lucius)

– Dorsal fin in usual position ……………..................................………….…………14

14(13) Dorsal fin long, at least 17 rays. The longest hard ray of the dorsal an anal fin

carrying denticles on the posterior edge. ....……….............................…………….15

– Dorsal fin short, maximum of 14 rays. Anal fin without the hard ray with

denticles..………………………………………………………………………….. 16

15(14) 4 barbels ………………………………………………..... carp (Cyprinus carpio)

– no barbels …………………………………………............Carassius sp.

16(14) 2 or 4 barbels................ ……………………………………………….....………..17

– no barbels ...............………………………………………………………..........….19

17(16) 4 barbels ………………………………………. common barbel (Barbus barbus)

– 2 barbels ……………………………………………………..........……..................18

18(17) Very small scales. No spots on fins, round edges of fins...........tench (Tinca tinca)

– Large scales, fins with spots, edges of fins straight, caudal fin with evident

concavity ……………………………………………….....…gudgeon (Gobio sp.)

19(16) Eyes positioned very low, in lower half of head, the lower edge of eye being lower

than the mouthline. ……….... bighead carp (Hypophthalmichthys sp.) introduced

– Eyes in usual position……………………………………….....………….......….. 20

20(19) Anal fin long, at least 19 soft rays ………….. common bream (Abramis brama)

– Anal fin short, 6 to 14 soft rays ..........................……………………………......... 21

21(20) Lower jaw longer than upper jaw, with the frontal edge with a node that fits a

concavity in the upper jaw. Terminal, large mouth, edge up to the eye

...................................................................................................asp (Aspius aspius)

– No concavity in upper jaw. Inferior mouth, if terminal then small (with one

exception in case of chub) ...........................……………………………………… 22

22(21) Small superior mouth. Dorsal fin is behind the level of the ventral fins......................

...……………………………............. common rud (Scardinius erythropthalmus)

– Dorsal fin at the level of the ventral fins ……..........……………....………………23

23(22) Dorsal and caudal fin with concavity. Red iris. Common roach (Rutilus rutilus)

– Dorsal and caudal fin with rounded. Iris green, grey-green.....................................

...........................................................................chub (Leuciscus cephalus)

Name, group

57

List of species in the ilustratory key for identification

Species order 1. European brook lamprey Lampetra planeri (Bloch, 1784) (Petromyzontiformes)

2. sterlet Acipenser ruthenus Linnaeus, 1758 (Acipenseriformes)

3. European eel Anguilla anguilla (Linnaeus, 1758) (Anguilliformes)

4. Common roach Rutilus rutilus (Linnaeus, 1758) (Cypriniformes)

5. European chub Leuciscus cephalus (Linnaeus, 1758) (Cypriniformes)

6. Common rud Scardinius erythrophthalmus (Linnaeus, 1758)(Cypriniformes)

7. asp Aspius aspius (Linnaeus, 1758) (Cypriniformes)

8. tench Tinca tinca (Linnaeus, 1758) (Cypriniformes)

9. gudgeon Gobio gobio (Linnaeus, 1758) (Cypriniformes)

10. common barbel Barbus barbus (Linnaeus, 1758) (Cypriniformes)

11. common bream Abramis brama (Linnaeus, 1758) (Cypriniformes)

12. crucian carp Carassius carassius (Linnaeus, 1758) (Cypriniformes)

13. common carp Cyprinus carpio Linnaeus, 1758 (Cypriniformes)

14. bighead carp Hypophthalmichthys molitrix (Valenciennes, 1844) (Cypriniformes)

15. wels catfish Silurus glanis Linnaeus, 1758 (Siluriformes)

16. brown bullhead Ameiurus nebulosus (Lesueur, 1819) (Siluriformes)

17. brown trout Salmo trutta Linnaeus, 1758 (Salmoniformes)

18. rainbow trout Oncorhynchus mykiss (Walbaum, 1792) (Salmoniformes)

19. grayling Thymallus thymallus (Linnaeus, 1758) (Salmoniformes)

20. northern pike Esox lucius Linnaeus, 1758 (Esociformes)

21. burbot Lota lota (Linnaeus, 1758) (Gadiformes)

22. stickleback Gasterosteus aculeatus Linnaeus, 1758 (Gasterosteiformes)

23. yellow perch Perca fluviatilis Linnaeus, 1758 (Perciformes)

24. zander Sander lucioperca (Linnaeus, 1758) (Perciformes)

pictures downloaded from: http://www.rybarskykrouzek.estranky.cz/clanky/atlas-

ryb/ryby.html

Name, group

58

1

3

4

2

Name, group

59

5

7

8

6

Name, group

60

9

11

12

10

Name, group

61

14

15

16

13

Name, group

62

17

18

19

20

Name, group

63

21

22

23

24

Name, group

64

Phylum: Chordata; Subphylum: Vertebrata

Class: Amphibia

Order: Caudata – salamanders and newts

Mark the names of the presented amphibians.

What is neoteny?

What are the differences between larvae of frogs and caudates (e.g. newts)?

What type of fertilisation is more common in frogs, which in caudates?

What body changes enabled first amphibians to live on dry land?

Notes:

Name, group

65

Egg strings of toads

tadpoles metamorphs

Amplexus:

Phylum: Chordata; Subphylum: Vertebrata

Class: Amphibia

Order: Anura – Frogs

What is the most common habitat of frog larvae? What are the exceptions?

What are parotoid glands in toads?

The pictures show 5 frog genera belonging to 5 families, name them.

Xenopus, Rana, Hyla, Bufo, Bombina

Notes:

:

Name, group

66

Phylum: Chordata; Subphylum: Vertebrata Class: „Reptilia“

Order: Testudines – Turtles

What are the proper terms for the ventral and dorsal parts of turtle´s shell?

What layers is the shell made of?

What is the basic difference between eggs of reptiles(and birds) and amphibian eggs?

notes:

Name, group

67

Phylum: Chordata; Subphylum: Vertebrata Class: „Reptilia“ Order: Squamata – scaled reptiles

Suborder: „Lacertilia“ lizards

Identify the families of presented animals, if possible also the species (use the tags :)

What is special about the genus Heloderma?

What are the differences between ovipary, ovovivipary and true vivipary?

notes:

Name, group

68

Phylum: Chordata; Subphylum: Vertebrata Class: „Reptilia“ Order: Squamata – scaled reptiles

Suborder: Serpentes – snakes

Identify the genera and families of presented snakes.

What is the function of the pits under nostrils in rattlesnakes (and other pit vipers)?

By what features can you distinguish legless lizards from snakes?

What are the three main types of venom apparat (type of venom delivery system) in

snakes?

notes: