The phylum Chordata includes animals that possess three defining features: a notochord, a dorsal hollow nerve cord, and pharyngeal slits. It is divided into four subphyla: Hemichordata, Urochordata, Cephalochordata, and Vertebrates. Hemichordata are considered the lowest chordates and include acorn worms. Urochordata includes tunicates like sea squirts and salps. Cephalochordata consists of lancelets. Vertebrates are the largest group and include humans.

1. PHYLUMCHORDATA

2. Presented By
Group – 07
 Imran Hossen - ASH1819017M
 Mita Mahmuda - BKH1819015F
 Wahida Nusrat - MUH1819037F
 Aysha Subrin Ifti - BKH1819044F

3. Animal of Chordates

4. Chordata
The last major group of the animal
kingdom is known as phylum
Chordata. Created by Balfour in
1880.
 A dorsal hollow tubular nerve cord
 A longitudinal supporting rod-like
notochord
 A series of pharyngeal gill slits
Key Chordate
Characteristics

5. Classification of Chordates
Chordata
Hemichordata Urochordata Cephalochordata Vertebrates

6. Hemichordata
Subphylum Hemichordata have long
been traditionally considered to be the
lowest chordates.
I. Body soft , fragile, vermiform ,
unsegmented, bilaterally,
symmetrical and triploblastic
II. Digestive tube complete straight or
U shaped
III. Body typically divided three distinct
reason protosome , collar and trunk
IV. Reproduction mainly sexual, sexes
usually separate gonads one to
several pairsSaccoglossus

7. Classification Of Hemichordates
Hemichordata
Enteropneusta Pterobranchia Plactosphaeroidea Graptolita

8. Example of Hemichordates
Balanoglossus a.Rhabdopleura b. Cephalodiscus
a b
Planctosphaera Pelagica Graptoliti
Class:
Pterobranchia
Examples:
1.Rhabdopleura
2.Cephalodiscus
Class:
Enteropneusta
Examples:
1.Balanoglossuss
2.Saccoglossus
Class:
Planctosphaeroidea
Examples:
Planctosphaera
Pelagica
Class:
Graptolita
Examples:
Graptoliti

9. Urochordata Subphylum Urochordata or Tunicata
includes about 2000 fixed and nearly
100 pelagic species exhibiting high
degree of diversity
I. Exclusively marine and cosmopolitan,
found in all seas at all depths
II. Simple(solitary), aggregated in groups
or composite (colonia)
III. Coelom absent, instead and ectoderm-
lined atrial cavity present which opens
to outside though arial aperture
IV.Asexual reproduction by budding
common
Ascidia Larvacea

10. Classification of Urochordates
Urochordate
Ascidiace Thaliacea Larvacea

11. Example of Urochordates
a b a b
a b c
a.Ascidia b.Molgula a.Oikopleura b.Kowalevskia
a.Pyrosoma b.Doliolum c.Salpa
Class:
Ascidiace
Examples:
1.Ascidia
2.Molgula
Class:
Larvacea
Examples:
1. Oikopleura
2. Kowalevskia
Class:
Thaliacea
Examples:
1.Pyrosoma
2.Doliolum
3.Salpa

12. Cephalochordata  Notochord and nerve cord present throughout life
along entire length of body.
I. Body small, 5 to 8 cm long, slender, fish-like,
metameric and transparent
II. Exoskeleton absent. Epidermis single legered
III. Muscles dorso-lateral, coelom enterocoelous,
notochod rod-like, digestive tract complete, nerve
cord dorsal, tubular without ganglia and brain.
IV. No asexual reproduction
V. The Cephalochordata comprise about 30 species
mostly of the genus Branchiostoma and all put in
the class Leptocardii
Lancelets

13. Importance of Chordates
As human and cattle food
Using as manure
Oils
Fish glue
Medicine and disease control
Scientific studies

14. Referance:
 Vertebrates- R.L. Kotpl
 www.wikipedia.org
 www.ucmp.berkeley.edu
 www.animaldiversity.org
 www.untamedscience.com

15. Any Question ??

16. Thank You
Chordata