Dorsal form the latin dorsum meaning back and/or the looking methods are not considered to be completely accurate the topic still be covered in depth as to help others to make educated guesses as to the gender of their specimen, at least until an intact molt/exuviae can be recovered.It is possible to make an educated guess at the specimens gender by examining the ventral side of the abdomen. You can use the looking method to visually sex the actual tarantula two ways, by , that is looking at the tarantulas ventral side, the underside of it's abdomen                                 Ventral comes from latin  meaning belly, stomach or womb. No one starts off good at it, In my early hobby days can recall going crazy because I couldn't detect any difference. Determining the sex of a tarantula can be tricky though, especially when it is younger as male and female tarantulas will often look and act extremely similar until mature. Examine the molt to look for the presence of a . The spermathecae is being manipulated with a toothpick.The same molt (Female G. porteri) approx.

I must warn sexing from photos can be difficult to impossible. No enclosure - $70 firm 2) A large colony of approx. Of these two B. hamorii/smithi (Mexican Red Knee) can you tell which one is the mature male and which one is the female?The male can identified (top) by the presence of his "boxing gloves".

If the gender is unknown no gender will be stated and the specimen will be sold as "un-sexed".

and ability to produce eggsacs. It will become easier and easier!Here is an Aphonopelma chalcodes (Arizona Blonde)  4 1/2" male first unedited: Second, we have added a yellow pencil line to show the more flat angle 5-7 degrees between the first pair of book lungs:Third, we have added another yellow pencil line to show the "triangle" or "arch" around the area of the Here is an Aphonopelma chalcodes (Arizona Blonde) 5" female first unedited:Second, we have added a yellow pencil line to show the larger angle of 15-20 degrees between the first pair of book lungs. I recall in my early hobby days it was so difficult but with time and practice it gets easier to make an "educated guess."

Aside from using the spermathecae to determine gender this reproductive organ is often used to identify and distinguish certain species.Below is the molt of a 3-4" female B. cabocla (Brazilian Red Head)Here is the same B. cabocla molt, a little closer, with the spermathecae outlined in yellow:Now compare these females molts to that of a male Avicularia (Pinktoe) below.Notice it's completely flat between the first set of book lungs? Check it out (click for expanded sizes, linked to the very helpful Above is a photo of the ventral side of a mature female practically presents itself direct line, going between internal corners of booklungscloser located to one another in contrast with femaleAngle formed lower edge of booklung to medium line of body of tarantulabooklungs more detour from horizontal line than at males, angle would be not less 20 degreesbooklungs are situated more horizontally than in males, angle would be nearly 5 degreesAbove photo is a preserved specimen of an adult male (From BTS Journal No. Many species of tarantulas exhibit sexual dichromatism, meaning that upon maturity the males and female will differ in coloring: There is no flap/presence of a spermatheca confirming this male. Gorgeous specimen. If we come across even semi-reliable method to sex spiderlings I will update this article with instructions.Getting an intact, read-able molt is a feat in itself...You must be quick to grab the molt soon after the tarantula has shed it's skin or else the tarantula is likely to much on it.

The mature pinktoe tarantula has a dark-colored body and pinkish feet, hence its name. Personally, it's hard for me to look at something 2D representing a 3D image. We do not attempt to "pick out" females or males from the “unsexed” specimens. Just like the adult male GBB and B. hamorii/smiti adults pictured above immature males typically have a lankier overall appearance including longer legs and smaller, more narrow fangs when compared to the females Be aware that females of most species go though a leggy adolescent phase and can be sometimes be mistaken for males during their "awkward teenage" years.

Did you know that different tarantula species have different spermatheca shapes? The female has a darkish brown body but a blonde head (carapace) and sometimes blonde leg segments. The male has a 3 inch (8cm) leg span and is reddish brown with dark legs. Avicularia avicularia, sometimes called the pinktoe tarantula, is a species of tarantula native from Costa Rica to Brazil and the southern Caribbean.This species is sometimes called the Guyana pinktoe, common pinktoe, or South American pinktoe.. She has a 5 inch (13cm) leg span. This female reproductive organ is where sperm is stored until the eggs are laid. First off, males tend to be thinner and “leggier” than the girls, who are much more heavy-bodies. The darker the color, the harder it typically is for memas well.Still, determining gender from a photo is very difficult and even those (such as myself) with some experience ventral sexing will likely have much more difficulty sexing from a photo vs being there, looking at the We appreciate if those refer to this and other resources online for general sexing, and to try to get eyes on your own spider(s) to gain the experience to get better at sexing.

I can tell you the more you practice, the better you'll get! Inside the spider’s retreat he was able to find other small birds. Males are often requested for breeding projects or for those who want a pet with a lifespan (and commitment) of a only few years. Make sure the molt is completely soft With the molt pliable, carefully unwrap the abdomen section. $50 for all and their enclosure Pictured below is a female Grammostola porteri (Rose Hair). Notice there is no "triangle" or "arch"?Originally I took photos of Brachypelma emilia for this ventral sexing article however, their black undersides did not make for good, clear photos. 80 local variety millipedes (Allajulus londenensis, I believe). One of his tibial hooks is just barely visible (as a cream colored lump) on the right side near where they're "holding hands".

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