Peripatus.pptx

1,419 views 5 slides Jun 28, 2022
Slide 1
Slide 1 of 5
Slide 1
1
Slide 2
2
Slide 3
3
Slide 4
4
Slide 5
5

About This Presentation

Connective link between Annelida and Arthropoda.


Slide Content

Peripatus Structure and Affinities K.Kamatchi Assistant Professor Department of Zoology Vivekananda College Tiruvedakam West

Arthropoda Class – Onychophora Living fossil Connective line between Annelida and Arthropoda Discontinous distribution Warmer parts – Africa – malya

Salient features Terrestrial Moist, shady, bark of dead trees Nocturnal Insectivorous Caterpillar 1.5-15cm Unsegmented Part – segmented Head, trunk

Antennae, eyes, oral papillae Mouth – jaws 14-43 legs – claws Anus Covered – soft – velvety skin Dermomuscular Haemocoel Straight – alimentary canal Slime gland – prey – captured Respiration – trachea – spiracles Excretion – metanephridia Heart – long tube Nervous system – ladder Fertilization – internal Development - direct

Affinities Guilding 1825 Place – Mollusca Mosely 1874 – Arthropoda Annelidan characters: Segments – homonomous Body – vermiform Dermomucular Legs – unsegmented Eye – simple Nephridia – segmentally Genital duct – ciliated Straight alimentary canal Arthropodan characters: Antennae – jointed Jaws Haemocoel Ostia – heart Tracheal system Chitinous cuticle claws Unique characters: Segments – not distinct Ladder – nervous Skin – soft Wrinkles Pair of jaws
Tags