Astraspida our ancestor

Dalia

Diamond Member
Sep 19, 2016
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We’re here because of this little beast that survived Astraspida
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Their structure, although poorly known, has often been used in evolutionary scenarios to illustrate the primitive state of the vertebrate dermal skeleton. Because of the acellular structure of their dermal skeleton, they were initially considered heterostracans

Astraspida - Wikipedia
 
We’re here because of this little beast that survived Astraspida
View attachment 683396
Their structure, although poorly known, has often been used in evolutionary scenarios to illustrate the primitive state of the vertebrate dermal skeleton. Because of the acellular structure of their dermal skeleton, they were initially considered heterostracans

Astraspida - Wikipedia

Because of the acellular structure of their dermal skeleton, they were initially considered heterostracans

The homostracans were fabulous, but they rarely reproduced.
 
I think my main issue with this idea is that Astraspida is a fish ... a fish living in water when land animals roamed for already 125 million years ... lots and lots of evolution happens in 125 million years ...

 
We’re here because of this little beast that survived Astraspida
View attachment 683396
Their structure, although poorly known, has often been used in evolutionary scenarios to illustrate the primitive state of the vertebrate dermal skeleton. Because of the acellular structure of their dermal skeleton, they were initially considered heterostracans

Astraspida - Wikipedia
I met a guy that looks like this. I'd call him fishlips. I don't know if he had a tale. No, this is not our ancestor. Humans from Adam on down are unique to the earth.
 

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