Need some help.

[Hobo]

If I'm understanding what Stan is saying and from my observations, the ones roaming around now are 2nd instars and not 1st? I caught one finishing a molt (middle of second pic). You can see some bristles in the photos, sorry for the crappy quality. Also are those the spinnerets showing on the ones with color showing? I separated a few out so I can observe the changes more closely. The process from EWLs to 2nd has been quick. Thanks for the links and the input.

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Yes... And no.... maybe.
Here's the thing:

An instar is named from how many molts it has had. So a first instar has molted once, a second instar twice and so on. Hatching from the egg into post embryos (EWLs) doesn't count, as it's not technically a molt.

Now, according to Stan (and/or his sources), after an egg "hatches" into a post embryo, it will next molt again into a slightly more developed stage that closely resembles a post embryo. This would be called a first instar since it is it the first molt.

But I, a lot of other hobbiests and breeders, and apparently you, have observed that this is not the case. We have observed that the next molt after the post embryo stage does not yield a more developed EWL stage, but instead what you have posted above.

The confusion that results from this is obvious.
What I and many others call a second instar, would be called third instar if we followed the development progression Stan posted.
I haven't had a chance to observe G. rosea development closely enough to prove my point (though my female just molted and I may get a chance with my MM), but your thread seems to suggest that it's true.

 

[Fins]

Yes... And no.... maybe.
Here's the thing:

An instar is named from how many molts it has had. So a first instar has molted once, a second instar twice and so on. Hatching from the egg into post embryos (EWLs) doesn't count, as it's not technically a molt.

Now, according to Stan (and/or his sources), after an egg "hatches" into a post embryo, it will next molt again into a slightly more developed stage that closely resembles a post embryo. This would be called a first instar since it is it the first molt.

But I, a lot of other hobbiests and breeders, and apparently you, have observed that this is not the case. We have observed that the next molt after the post embryo stage does not yield a more developed EWL stage, but instead what you have posted above.

The confusion that results from this is obvious.
What I and many others call a second instar, would be called third instar if we followed the development progression Stan posted.
I haven't had a chance to observe G. rosea development closely enough to prove my point (though my female just molted and I may get a chance with my MM), but your thread seems to suggest that it's true.

It didn't seem to me that there was anything between EWLs and them crawling around. I thought it was interesting that they seemed to become EWLs then slowly "flattened out". If that makes sense. Then they darkened up and molted again and were walking around. I separated on of the less developed EWLs to watch it more closely. It had not darkened up yet but should soon.

 

[Fins]

This is what I have running around now. Yes I know it looks like I took the picture with a potato.

As for progression. The first pic is yesterday, an EWL I separated out. Pic 2 was this morning. They seem to start unfolding from the egg. Pic 3 is recently molted and very clumsy. They end up on their backs a lot.