Sexing linothele and cupiennius sp.

[Saksida2000]

Any tips how to sex these two? Linothele would probably be similar to theraphosids, since they are both mygalomorphs, what about cupiennius? Any photos would be welcome. Thanks

 

[winter]

I have no experience with Cupiennius so cannot speak to ease or difficulty of sex identification. As for Linothele, I have a Linothele sericata and never did know its sex until its ultimate molt when its tibial apophysis and palpal bulbs were evident. From the time it was a tiny sling until it was a mature male, it was always hidden in its intricate web tunnels and molts were always stashed away so ventral sexing or molt sexing were not possible.

Linothele sericata

• winter
• Jul 24, 2022
• 1
• sericata

mature male, most of the blue coloration turned darker with his ultimate molt.

 

[ForTW]

What sp.?
Cupiennius salei got sexual dimorphism.

 

[Saksida2000]

What sp.?
Cupiennius salei got sexual dimorphism.

Sericata/ex megatheloides. When does the dimorphism start to show? I just got 2 slings. Around 0.25" in size

 

[ForTW]

Sericata/ex megatheloides. When does the dimorphism start to show? I just got 2 slings. Around 0.25" in size

I am talking about the cupiennius sp.

 

[Saksida2000]

I am talking about the cupiennius sp.

Oh, sorry. It's a salei.

 

[ForTW]

Yeah they have a sexual dimorphism. Males are more orange like bright and females start to darken.
There are some females covering up as a male till subadult.
Also females get a lot larger.

 

[Saksida2000]

Yeah they have a sexual dimorphism. Males are more orange like bright and females start to darken.
There are some females covering up as a male till subadult.
Also females get a lot larger.

When does the dimorphism start? I thought it only starts when they mature?

 

[liquidfluidity]

Their color will show a bit before maturity. The male will of course show first. The females coloration will change slightly until the molt to maturity and then it's colors will pop

 

[Bastian Drolshagen]

Methods for sexing theraphosids work for Linothele (and most other mygalomorphs).

 

[liquidfluidity]

Completely dimorphic

 

[fredwardkroeger]

Any chance y’all know if Coccinius are dimorphic?