I know there is a section for tarantula ID

Moltar

Moltar

ArachnoGod
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I think brocklehursti's are generally a little smaller (which I can't tell from the pics anyway), have skinnier legs and have smaller bands of white at the knees with little to no vertical leg stripes. The last bit about the legs is what I'm basing my statement on.

It would be prudent to wait for a couple of more people to chime in as well. I'm not an expert on Acanthroscurria or anything, I just remember this subject coming up in the past. If you google images of A. brocklehursti and compare to these photos you'll see what I mean though.
 
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bradpaden

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not sure still but I think I may see a small difference and think they are A genics but anyone feel free to give me your opinion.
 
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mandipants

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I vote A. genicalata across the board. The others in the genus usually don't have as dramatic of a contrast in colors.
 
xhexdx

xhexdx

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Eric, if you or deathcrew could provide a little explanation to your conclusions, I know I would personally appreciate it, since I don't know how to identify the two.

Also, it would help for future members who ask the same question (or search) to be able to know how to properly identify them.

:)

--Joe
 
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bradpaden

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aschamne if #1 is broc then my male and her wouldn't have hooked up right, or is it possible that they might cross breed? They got together the first time I paired them but there has been no action since then. And if there is any chance they did cross then is there any chance it might take because they are so closly related?
 
GoTerps

GoTerps

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xhexdx said:
Eric, if you or deathcrew could provide a little explanation to your conclusions, I know I would personally appreciate it, since I don't know how to identify the two.

Also, it would help for future members who ask the same question (or search) to be able to know how to properly identify them.

:)

--Joe
Click to expand...
Joe, check out the difference in banding on these spiders. The transverse white bands on the legs are much thicker in A. geniculata.

Mature males differ in their palpal bulb morphology.... see here.

Eric
 
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Aschamne

Arachnobaron
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Eric,

I'm sorry but I have to disagree with you on this one. Don't look at the bands to differentiate these two species, but rather the striping between the bands. My brocklehursti has wider bands than most, but the striping in still cream color. The striping on the geniculata is white. Although the only way to be 100% positive would be to compare the spermathecae of the T in question to a known geniculata and/or brocklehursti. Remember, that coloring alone can not be used to determine ID.

Art
 
GoTerps

GoTerps

Arachnoking
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Aschamne said:
Eric,

I'm sorry but I have to disagree with you on this one.

Art
Click to expand...
Hi Art,

No problem :) We shall agree to disagree.

Although the only way to be 100% positive would be to compare the spermathecae of the T in question to a known geniculata and/or brocklehursti.
Click to expand...
I'm not sure the shape of the spermathecae would provide a way to differentiate these 2 species. In fact, I bet it's a not a reliable feature to separate them (Can't swear to this though). Spermathecae shape is not always a reliable feature to seperate the members of a given genus.

I'm also not sure anyone knows how variable the banding is in these 2 species. Who knows if our hobby stock is representative of populations (throughout their range) in the wild.

However, anytime I've seen our hobby A. geniculata and A. brocklehursti females side-by-side... well, the thickness of the banding is noticeably different.

Eric
 
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bradpaden

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Ok I'm not sure what to think now. But since most are saying A genic I think I'm gonna go ahead with the breeding. Oh and my second female the one that wouldnt breed is about to moult I believe. That light spot on her abdomen is dark now so unluss I'm ill informed shell be molting soon, is this correct?
 
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