11-9 Lab Slides Chordata

Ammocoetes larva mid-body
Top round section is DNC (dorsal nerve cord)
Next round section is Notochord
Then below that is coelom.
Phymum Chordata
















Amphloxus digestive tube
Same with this x-section
You can see DNC, Notochord, and celoem
Phylum Chordata

You can not tell the difference between this slide and the one above it. What you DO need to be able to do is to know that they are BOTH Phylum Chordata and you need to be able to identify the dorsal nerve cord (DNC), notochord, and celoem.
















Ammocoetes
You can see the seven gill slits which identify this as a lamprey
Can also see the post anal tail, and anus
Phylum Chordata
Subphylum Vertebrata
Class Agnatha