This is the first lesson that students of chordate zoology need to learn and understand
Non Chordate
|
Chordate
|
|
Notochord
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Absent
|
Present
|
Nerve
cord
|
Absent
or Ventral in position
|
Dorsal
tubular (hollow) nerve cord
|
Pharyngeal
gill slits
|
Absent
|
Present
|
Post
Anal Tail
|
Absent
|
Present
|
https://commons.wikimedia.org/wiki/File:Figure_29_01_04.jpg
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||
Note
|
Chordate
characters are present in the body at some stage of the life cycle e.g., Tadpole
larva of Herdmania has all chordate
characters but the adult stage only has pharyngeal gill slits.
|
|
Here is a brief video about this topic
Vikas Yadav
Associate Professor and Head
Dept. of Zoology, S.V. College.