Homology of shark and amphioxus

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ppaulinaa
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Homology of shark and amphioxus

Post by ppaulinaa » Mon Nov 07, 2005 9:54 pm

Can someone tell me what structures in amphioxus and shark are homologous? :shock:
Thank You very much

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MrMistery
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Post by MrMistery » Tue Nov 08, 2005 8:32 pm

Good question. They both have notocord in embryo state?(even if amphioxus has it as an adult too).. Sorry, can't think of anything, it's past my bedtime...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

123Herpatology
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amphioxus(or lancelet)

Post by 123Herpatology » Wed Nov 09, 2005 4:48 am

Well, i drew some conclusions from wikipedia, her goes:
They both have anus', blood systems, gill slits, regular reproductive organs i.e. gonads/testis and ovaries, a nervous system (except lancelets have their nerves branching from notocord.). there is prolly more, i hope i understood the question :(
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tropicbirder
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Post by tropicbirder » Fri Nov 18, 2005 2:33 am

They both have a single, hollow notochord, a post-anal tail, a dorsal nerve cord, and gill slits. These are characteristics of all chordates, humans included. It's just that the tail and gill slits disappear before we are born. Otherwise, they are not very similar in structure (they are different subphyla, after all).

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