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Veribug

B hamorii sex (male?)

Super sorry for quality. Was sold as smithi by a pet shop, go figure, I assume it's a hamorii. Thought it was a female for the longest time but a couple of moults later honestly certain they look male now. No hooks or anything yet though. Thoughts?

B hamorii sex (male?)
Veribug, May 16, 2019
    • Arachnophoric
      If you have any of the molts, you could sex those to be sure. Furrow looks kind of girly to me tbh. About what size is it and how long have you had it?
    • VanessaS
      Male. These boys can take a long time to mature. I have two males who are both 5" and neither are mature.
      Veribug likes this.
    • Arachnophoric
      @VanessaS what is it specifically that you look for when ventral-sexing Brachypelma? I always struggle.
      VanessaS likes this.
    • Veribug
      @Arachnophoric I bought them in 2016 and they've moulted about twice in my care I think (I don't keep my temps too high). I *did* have a moult somewhere but I can't remember where I left it! If I find it I'll see if I can spot any spermatheca
    • mosesobe
      @Arachnophoric if you look at the tittle for this section it’s called epiandrous fusillae sexing, those are the second set of spinerets that male tarantulas have to spin their sperm webs, these are typically positioned right above the epigastric furrow and typically are tiny black hairs like you see in the pic above the black triangle above the furrow that indicates male in a lot of species...
      VanessaS likes this.
    • Arachnophoric
      @mosesobe I doooont think spinnerets are the word you're looking for? I understand this sexing method is generally when you're looking for the presence of epiandrous fusillae, but it is not always as obvious (to me) depending on what genus you're dealing with. Sometimes there are other giveaways like the dot method (like with Poecis) sometimes it's the shape/length of the furrow that is more exaggerated, a dark patch above the furrow, etc. That's what I was referring to.
      VanessaS likes this.
    • mosesobe
      @Arachnophoric when you see the dark hairs you know its a male, some are in the form of a patch and others a dot but that is the easiest way to ventral sex, those that dont have these patches are much harder to sex based on the other signs like the curve the lips and the distance between the book-lungs etc. (in this picture there is a clear patch of epiandrous fusillae)
      VanessaS likes this.
    • Arachnophoric
      @mosesobe yeah that was more what I was asking. Now that i'm looking at it on a different screen I can see the dark arch of hairs over the furrow lol.
      VanessaS and mosesobe like this.
    • VanessaS
      @Arachnophoric Epiandrous fusillae is the name for the specialized group of micro spinnerets that males use during sperm web production. A darker semi-circle patch of very dense hairs indicate the presence of those epiandrous fusillae underneath. If you are looking at the inside of the exuvia that semi-circle patch is actually lighter than the surrounding exoskeleton.
      In addition, females at that size (I ballparked size by the fingers holding him in a pinch grab, because it wasn't specified) will have an obvious 'moustache' of white hairs above the furrow.
    • Arachnophoric
      mosesobe and VanessaS like this.
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  • Category:
    Epiandrous fusillae sexing (Not Molts)
    Uploaded By:
    Veribug
    Date:
    May 16, 2019
    View Count:
    178
    Comment Count:
    12

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    Width:
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    Height:
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    Aperture:
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    Make:
    HMD Global
    Model:
    Nokia 6
    Date / Time:
    2019:05:15 18:43:21
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    66/1000 sec
    ISO Speed Rating:
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    Focal Length:
    3.57 mm
     

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