Spirula spirula info. please!

[monty]

thanks! Knowing the word endogastric led me to this: http://www.thecephalopodpage.org/FosCephs.php which answers a few questions and raises some as well.

It seems like someone should be doing some genomic analysis to compare spirula to nautilus and to other coleoids. And the cirrate octopods and vamyroteuthis to more typical coleoids.

It still seems to me that spirula's shell geometry throws a big wrench into all the standard clade diagrams, and yet it seems to just not get discussed much... but maybe I'm just not looking in the right places, hence this thread! (the usual "I am an ignorant computer scientist, not a real bio-/palaeo-/teuth- or other -ologist" caveats apply)

 

[cuttlegirl]

I will have to search a little, but I have some SEMs that I took of Spirula's siphuncle - If I can find them, I will scan them and post them...