classes (detailed) Flashcards
AGNATHA (lacks jaw)
CLASS- CYCLOSTOMATA
elongated body ectoparasites on some fishes. body bears 6-15 gill slits. mouthof sucking and circular type without jaws, devoid of scales and paired fins, cranium and vertebral column r cartilaginous, circulation of closed type. exclusively marine hut travel to fresh water foe spawning
EXAMPLES- CYCLOSTOMES
- Petromyzon (lamprey)
- Myxine (hagfish)
GNATHA- (bears jaw)
CLASS- CHONDRICHTHYES
marine animals, cartilaginous endoskeleton. streamlined body, mouth on ventral side, notochord persistent throughout life. gill slits separate without operculum, skjn is tough, palcoid scales r present. modified placoid scales in teeth directed backwards, absence of air bladders, heart of two chamber. electric (torpedo) poison sting (trygon) sexes r separate, fertlization internal, viviparous
EXAMPLES- CHONDRICHTHYES
1.Scoliodon (dog fish)
2. Charcaharodon (hreat white shark)
3. Pristis (saw fish)
4. trygon (Sting ray)
CLASS- OSTEICHTHYES
both marine amd fresh water, streamlined body, mouth on the terminal side, 4 pair of gills present covered by operculum, air bladders r present, skin is covered by cycloid or ctenoid scales, sexes r separate, fertilisation is external, development is direct, oviparous
EXAMPLES - OSTEICHTHYES
A] MARINE:
1. Exocoetus (flying fish)
2. Hippocampus (seahorse)
B] FRESH WATER
1. Labeo (rohu)
2. Catla (katla)
3. Clarias (magur)
C] AQUARIUM
1. Betta (fighting fish)
2. Prerphyllum (angle fish)
CLASS- AMPHIBIA
aquatic as well as terrestrial, body is divided in head and trunk, takl may be oresent, skin is moist without scales, eyes have eyelids, tympanum is present as a ear, alimentary canal, urinary and reproductive tract opens in a common opening knows as cloaca, respiration is by gills, lungs or skin, heart is threee chanbered 2 auricles 1 ventricle, fertilisation is external, oviparous, development is indirect.
EXAMPLES- AMPHIBIA
- Bufo (toas)
- Rana (frog)
- Hyla (tree frog)
- Salamandra (salamander)
- Ichtyophis (limbless amphibia)
CLASS- REPTILIA
they r mostly terrestrial, have dry or cornified skin, skin is made of scales or scutes, no ear but tunpanum is present, 3 chambered heart is present- 2 auricles and 1 ventricle except crocodiles- 4 chambered, sexes r separate, fertilisation internal, development direct, oviparous
EXAMPLES- REPTILIA
- Chelone (turtle)
- Testudo (tortoise)
- Chameleon (tree lizard)
- Calotes (Garden lizard)
- Crocodilus (crocodile)
- Alligator (alligator)
- Hemidactylus (wall lizard)
snakes - Vipera (viper)
- Naja (cobra)
- Bangarus (Krait)
CLASS- AVES
presence of feather, possess beaks, fore limbs are modified to form wings, hind limbs r modified for walking swimming etc. skin is dry except the oil gland present below tail, endoskeleton is ossiefied (bone), long bones wid air cavities, digestrive tract contains additional chambers- crop and gizzard, hear is 4 chambered, lungs r there for respiration l. fertilisation is internal, development is direct and oviparous
EXAMPLES- AVES
- Corvus (crow)
- Columba (pigeon)
- Struthio (ostrich)
- Pavo (peacock)
- Aptenodytes (Penguin)
- Neophro (vulture)
CLAS MAMMALIA
milk producing glands by which young ones r nourished, 2 pairs of limbs , skim posses hair, external ears or pinnae are present, different types of teeth in jaw, heart is four chambered, respiration is by lungs, sexes r seperate, fertilisation ks internal, development is direct, viviparous (few exceptions)
EXAMPLES- MAMMALIA
OVIPAROUS-
1. Orinthorhynchus (platypus)
VIVIPAROUS-
1. Macropus (kangaroo)
2. Pteropus (flying fox)
3. Camelus (camel)
4. Macaca (monkey)
5. Rattus (rat)
6. Canis (dog)
7. Felis (cat)
8. Elephas (elephant)
9. Equus (horse)
10. Delphinus (common dolphin)
11. Balaenoptera (blue whale)
12. Panthera tigris (tiger)
11. panthera leo (lion)
