What are these?

[Samantha Lewanewsky]

Had a close look at a couple of my tarantulas chelicerae, and they have tiny black triangles on them.
I haven't had a look on all of my spiders, but I know my S.philippinus, N.chromatus, C.fimbriatus and L.parahybana have them.

Got a pic (drawn sorry, bad quality too cos it was taken on my phone!)

[Ray Hale]

They are chelriceral "teeth". Used as a taxonomic tool for identifying spiders.

Ands its not a bad drawing to be honest.

Ray

[Phil Rea]

They are cheliceral 'peg' teeth. I believe they are used for grip when biting prey

Beaten to it

[Samantha Lewanewsky]

Thanks for the quick replies, and kind comment about my drawing

Pretty interesting stuff, are they made out of the same stuff as fangs? What are fangs made of? Keratin?

[Phil Rea]

Same stuff

Have a look at Raven's paper describing Coremiocnemis tropix here. On the 6th page, marked P20. in the paper, there are some excellent photos of these

[Samantha Lewanewsky]

Thanks Phil, lovely looking spider! How come the spider in the first pic is brown and then in the other pics it's very orange?