1.
By
Kanwal Nisa

2.
Hexapoda and Myriapoda

3.
Evolutionary prospects
 Hexapoda (hexa-six poda-feet)
 Myriapoda (myria-many poda-feet)
 It includes the insect and most abundant and
diverse group of the terrestrial environment.
 Zoologist study 750,000 speiese of insects.
 More then 30 million speiese are present
 Earle divonion period most animals are
uninhabited.

4.
Continue….
 After low growing herbaious, plants,
forest the ozone layer is formed that
make the survival of individual animals
easy.
 Larvae undergoes metamorphosis.
 High reproduction rate.
 Animals with adapted that permit life on
land.

5.
Hexapoda and myriapoda

6.
Adaptation/Factors
 Exoskeleton formation that provide
support to the body
 Evolution of flight;
• collect widely scattered food.
• help in reproduction, feeding,
• protect from predators.
 Waxy epicutical layer that preserve
water loss

7.
classification
 Class diplopoda
 Class chilopoda
 Class pauropoda
 Class symphyla

8.
Class diplopoda
 About 1600 speiese.
 Live in terrestrial environment.
 Metamirism process.
 Segment about 10 to 100 .
 Two pairs of legs are present
 in each segment.
 They have short antenna.
 Cylindrical body.

9.
Continue…
 They feed on dead decaying matter by
use of Mandible.
 Defuse against predators by use of
chemical hydrogen cyanide (HCN).
 Reproduction:
• Male millipade transfer sperm to female
with spermatophora.

10.
Class chilopoda
 Live on forest, rock.
 Lack waxy epicutical.
 Feed on earthworms, snails,
 small arthropods.
 Reproduction:
• Male lays down silk web and
• place spermatophora.
• Female pick silk web and take into genetal pore.
• Eggs are fertilized into new individual

11.
Class pauropoda
 There size varries from 0.5mm to 1.5mm.
 Body segments are 8 to 11.
 Live on forest, rock.

12.
Class symphyla
 Live on forest and rock.
 There size varry from 2mm to 10mm.
 Body segment are 12.
 They have only 1 pair of legs on each segment.