clarification on "instar"

Delailah

Arachnosquire
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Mar 16, 2006
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101
Hi all,

After doing some searching, I'm confused on the classification of instars. I've read that after hatching and a spiders first molt, the sling (is it even a sling at this point?) is considered a "1st instar". After the second, the baby is considered a "2nd instar"... and so on. With this in mind, is an unmolted, just hatched baby only an "instar" then?

Are "eggs with legs" considered only instars, or are they not awarded that status until a first molt? Are unmolted babies just "eggs with legs" until they molt, and THEN ultimately called "1 instars"?

Holy smokes... did that make sense?

I just however, read a post from someone here on the boards that said you call call them a "...N2 or 1st instar..." :? What is the "N" classification and how is it used?

When do you stop calling them instars? I have a B. smithi that is at least a 9 instar at this point. {D

Perhaps I should put down a blanket question and ask if anyone knows of a classification system for baby spiders.

Thanks folks! :worship:
 

TheDarkFinder

Arachnoangel
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912
the eggs are consider eggs then the egg molts to a egg with legs.

Eggs with legs are considered 1st instar.

The sling is the 2nd instar. This stage stays until it starts to show color. Then it is juv.
 

Delailah

Arachnosquire
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Mar 16, 2006
Messages
101
Nice... :clap:

Okay, I'm starting to understand now. Thank you!

What is the "N" classification?

I ask this because I'm looking to buy a few more arachnid family members, and have found several listed using the "N" classification.
 

Delailah

Arachnosquire
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Oh duh... I forgot the 2nd part of my question. :8o

Explain "egg molting".....
 

Talkenlate04

ArachnoGod
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The round eggs when ready to molt will pop out pac man style, the legs will just pop out of nowhere. It's really cool to watch. They will look like miny Ts at that point but cant really move at all, they can wiggle their legs a little.
 

Talkenlate04

ArachnoGod
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the eggs are consider eggs then the egg molts to a egg with legs.

Eggs with legs are considered 1st instar.

The sling is the 2nd instar. This stage stays until it starts to show color. Then it is juv.
Wait, I might have been doing this wrong then.......

I thought it was,
eggs
eggs with legs (wiggling legs but not mobile)
first instar,(mobile but clumsy, and not feeding)
second instar. (feeding slings and fully mobile)

So is it
Eggs
Eggs with legs 1st instar
2nd instar mobile but not eating,
3rd instar fully mobile slings and eating?
 

Talkenlate04

ArachnoGod
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That's what I thought. At least that was how I was defining the stages.
 

WyvernsLair

Arachnobaron
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Wait, I might have been doing this wrong then.......

I thought it was,
eggs
eggs with legs (wiggling legs but not mobile)
first instar,(mobile but clumsy, and not feeding)
second instar. (feeding slings and fully mobile)

I believe from what reading I had done that it is more proper to refer to the eggs with legs as Nymphs. I think the eggs with legs is just a fun made up cutesy name since Nymph sounds so boring. {D
 

Varden

Arachnodemon
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I'm with Ryan. Eggs with legs (or nymphs) molt into 1st instar, which look more spider-ish but are still living off the egg yolks in their bellies. Then 1st instar molts into 2nd instar, which is when they start to get hairy and look like real Ts. For most species, this is also when you start to feed.
 

GoTerps

Arachnoking
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Embryos (eggs)
Postembryos (eggs w/ legs)
1st instar

Most in Europe will use the following terminology:
Eggs
Nymph 1
Nymph 2
(sometimes Nymph 3 as in some Poecilotheria)
1st instar...
 

TTstinger

Arachnobaron
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Jan 20, 2006
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310
Embryos (eggs)
Postembryos (eggs w/ legs)
1st instar

Most in Europe will use the following terminology:
Eggs
Nymph 1
Nymph 2
(sometimes Nymph 3 as in some Poecilotheria)
1st instar...
this is the right one

you have
1. egg
2. eggs with legs (nymph 1)
3. eggs with legs looking more spider like not the stubby legs anymore (nymph 2)this is a nymph 2

4. when the show color other than yellow you have a 1st instar ready for a meal. This is a 1st instar


get the Idea
 

Talkenlate04

ArachnoGod
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Your last picture is what I call 2nd instar or 2nd stage nymph, and a feeding sling. Oh well we all know what stage is a feeding sling that is ready to be sent out to others that's all that matters.
 

Ron_K

Arachnopeon
Joined
May 12, 2004
Messages
42
Biologically speaking.

Just to put this to rest, no matter what everyone's "opinions" are, the Actual definition of 1st instar is the nymph or the first stage after the egg.
So eggs with leggs are in fact the actual 1st instar.
 

GoTerps

Arachnoking
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Hi,

this is the right one

you have
1. egg
2. eggs with legs (nymph 1)
3. eggs with legs looking more spider like not the stubby legs anymore (nymph 2)this is a nymph 2
4. when the show color other than yellow you have a 1st instar

get the Idea
That's just your opinion. It's not the "right" one.

I do not use the term "nymph" in regards to spiders. And definitely not larvae.

I will always use the following terminology.
Embryo
Postembryo
1st instar...

CLICK HERE

Eric
 

GoTerps

Arachnoking
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Just to put this to rest, no matter what everyone's "opinions" are, the Actual definition of 1st instar is the nymph or the first stage after the egg.
So eggs with leggs are in fact the actual 1st instar.
This is the first thing I strongly disagree with in this thread :)

Eric
 

Talkenlate04

ArachnoGod
Old Timer
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8,660
I will always use the following terminology.
Embryo
Postembryo
1st instar
...

So if you use that terminology which one of those stages is the feeding stage? 1st instar?
Ugg I surrender. As along as everyone knows when to start feeding their little ones I am happy. :}
 
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