Baby turbo snails

I've got baby turbo snails.  They are 1/4  inch.   This is how I've been finding them in my DT and sump since the set up of my tank. About 2 years.  This is the 1st time that I could get one out to photograph.  I know that i still need to do a journal and the reports, but I'd like to know if I am getting pictures that actually show enough to prove the snail is still living, and small enough that it is not commercially available.

Are these pictures sufficient to report spawn, hatch and settlement reports.
 
There are more pictures here:
 
http://ginah.shawwebspace...iew/baby_turbo_snail_/
 

Attached Image(s)

I hate to say it, but my guess is that those are collonistas. Those are good photos of the snails, though, and congratulations on them! They are good snails for diatoms and such and reproduce quite well.
 
Take a look at some of these and tell me what you think:
 
https://www.google.com/search?q=collonista+snails&hl=en&client=firefox-a&hs=jq2&rls=org.mozilla:en-US:official&tbm=isch&tbo=u&source=univ&sa=X&ei=hB1LUemrPIjprAGph4C4AQ&ved=0CDcQsAQ&biw=2303&bih=1405

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886

For a spawn report, you would need pictures of the actual eggs.  Hatch would require images of newly hatched larvae.  You get the idea.  You cannot use an image of a later stage juvenile to prove a spawn or hatch event, for example.
 
You might check out some other people's snail journals that have approved reports, such as this one: http://www.masm.org/mForums/tm.aspx?m=35995.
 
And then, there is, of course, this excellent article:  http://www.advancedaquarist.com/2009/11/aafeature
 

Thanks Andy,  it does appear that they are collonista.  It also explains why none of them get any bigger.

And for collonistas that will be pretty tough, I believe, since I think that they are broadcast spawners with larvae that have very, very short pelagic veliger phases. I think the documentation could be done, but it'll be tough. Video of them spawning and shots of small snails--along with some evidence of an increasing adult population--would probably do it for me. Of course, if would be better if you could capture the veligers and give us microscope shots, but that's just shooting for the moon, yeah?
 

 
Ah, Jim. Why'd you have to bring that hack into this perfectly nice conversation?

--Andy, the bucket man.
"Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886

In my experience, the adults are from about 4 to 7 cm test diameter. The larval stage is typically from 38 to 50 days, there is a lot of variation in culture in the larval period probably due to variations
 in physical and nutritional factors during the larval period. 
 
adil

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