Sexual dimorphism before or after final molt/species specific question

[Iamconstantlyhappy]

Does sexual dimorphism express itself in males only after the final molt, or does it express itself prior to that, or is it dependent upon the species.

In Lampropelma nigerimmum, how/when is it expressed?

 

[Smotzer]

Well they are always sexually dimorphic ei size and morphology but the color changes are more dichromatic and as far as I am aware yes it is after final molt, I can’t say for all species as I do not know every species but I think in general most that are are not before.

 

[viper69]

Does sexual dimorphism express itself in males only after the final molt, or does it express itself prior to that, or is it dependent upon the species.

In Lampropelma niggerimmum, how/when is it expressed?

Aside from size, many Ts do not have sexual dimorphism. Meaning you cannot look at one and determine what sex it is. I’m excluding hooks of course.

The SD can express itself before the final molt too for some species.

It’s nice when you can look at a species and know sex by color/pattern, but can be disappointing

 

[The Grym Reaper]

Depends on the species but there are very few species that exhibit sexual dimorphism prior to maturity.

In Lampropelma nigerrimum the males will turn light brown at approximately 2 inches whereas females retain their darker colouration (I'm starting to feel like I've answered this a bunch of times on the forum already). The post linked below shows the difference at 2" in L. nigerrimum, the thread also shows Phormingochilus arboricola (ex L. sp. "Borneo Black"/L. nigerrimum arboricola).

Lampropelma sp. 'Borneo' sexual dimorphism

Lampropelma sp. 'Borneo' males start showing tarsus and metatarsus coloring early as two inches. 2" Male Leg I tarsus and metatarsus 2" Female Leg I tarsus and metatarsus By 3" the males other legs have gained the colors......... 3" Male 3" Female When the...

arachnoboards.com

 

[Iamconstantlyhappy]

Depends on the species but there are very few species that exhibit sexual dimorphism prior to maturity.

In Lampropelma nigerrimum the males will turn light brown at approximately 2 inches whereas females retain their darker colouration (I'm starting to feel like I've answered this a bunch of times on the forum already). The post linked below shows the difference at 2" in L. nigerrimum, the thread also shows Phormingochilus arboricola (ex L. sp. "Borneo Black"/L. nigerrimum arboricola).

Lampropelma sp. 'Borneo' sexual dimorphism

Lampropelma sp. 'Borneo' males start showing tarsus and metatarsus coloring early as two inches. 2" Male Leg I tarsus and metatarsus 2" Female Leg I tarsus and metatarsus By 3" the males other legs have gained the colors......... 3" Male 3" Female When the...

arachnoboards.com

Thanks for the link, very informative. I’m assuming that the Borneo black’ sd is the same as the nigerrimum’s, is that correct? If so that my question has been 100% resolved and I can look forward to observing the coming change.

 

[The Grym Reaper]

Thanks for the link, very informative. I’m assuming that the Borneo black’ sd is the same as the nigerrimum’s, is that correct? If so that my question has been 100% resolved and I can look forward to observing the coming change.

Phormingochilus arboricola don't show it fully until 3" on account of being a larger species but in both cases the males turn light brown and the females stay dark.

 

[l4nsky]

Depends on the species but there are very few species that exhibit sexual dimorphism prior to maturity.

In Lampropelma nigerrimum the males will turn light brown at approximately 2 inches whereas females retain their darker colouration (I'm starting to feel like I've answered this a bunch of times on the forum already). The post linked below shows the difference at 2" in L. nigerrimum, the thread also shows Phormingochilus arboricola (ex L. sp. "Borneo Black"/L. nigerrimum arboricola).

Lampropelma sp. 'Borneo' sexual dimorphism

Lampropelma sp. 'Borneo' males start showing tarsus and metatarsus coloring early as two inches. 2" Male Leg I tarsus and metatarsus 2" Female Leg I tarsus and metatarsus By 3" the males other legs have gained the colors......... 3" Male 3" Female When the...

arachnoboards.com

I know you answered it once for me when I was inquiring about Phormingochilus sp Akcaya color changes before ultimate molt (thanks by the way).

 

[Steaminpies]

@The Grym Reaper I’m fairly certain you don’t own one, but would you think the same idea of males turning brownish by 2 - 3” applies to Lampropelma carpenteri as well?

 

[The Grym Reaper]

@The Grym Reaper I’m fairly certain you don’t own one, but would you think the same idea of males turning brownish by 2 - 3” applies to Lampropelma carpenteri as well?

I don't think so but I've never kept them and haven't really looked into them that much.