Spider Fangs

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NikonUser
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Spider Fangs

Post by NikonUser »

Ventral view of a pair of chelicerae showing the terminal fangs and the crushing teeth.
The fangs have an internal canal through which the spider passes venom, the exit hole can be seen as a pale spot just before the tip of each fang.
The two rows of prey-crushing teeth on each chelicera are offset. Between each row is a groove into which fits a fang. I can image that as the fang closes bits of crushed prey are squeezed out between the gaps in the teeth. If the teeth were opposite each other there would be no room for prey bits-and-pieces to be squeezed out.
The teeth appear to have a complex shape, maybe a pyramid or perhaps 3-sided.
I'm glad these things don't hunt humans, or cats and dogs.

20x ELWD Nikon M Plan on bellows at about 15x magnification, Flash, stryrofoam diffuser, ZS PMax. D600.
Image is intentionally overexposed to show teeth details; at a decent exposure the fangs and particularly the teeth come out black and featureless.


Image
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

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dissent
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Post by dissent »

Excellent photo. Makes me very glad I am not a potential prey item.
- Ian
"Truth is stranger than fiction, but it is because Fiction is obliged to stick to possibilities. Truth isn't." - Mark Twain

Charles Krebs
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Post by Charles Krebs »

Excellent. Nicely done!

snic320
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Post by snic320 »

Very good idea!, nicely done!

cappo
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Post by cappo »

Amazing photo. 8)

NikonUser
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Location: southern New Brunswick, Canada

Post by NikonUser »

Thanks everyone for the feedback.
I isolated a fang and photographed it on my BHS. 62.5x on sensor. DIC.
Note the 2 rows of peg-like 'teeth' bordering a groove at the base of the fang.
The tip is grooved on the outer surface, and the venon opening can be seen.
Image
Image
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

spongepuppy
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Location: Sydney, Australia

Post by spongepuppy »

Spectacular. Any idea what sort of spider these are from?
---
Matt Inman

Rollin
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Post by Rollin »

Impressive, both the subject and the picture!

Ecooper
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Post by Ecooper »

Utterly spectacular! What species are they from?

NikonUser
Posts: 2656
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

Thanks guys.
Spider ID seems more difficult than insect ID; I'm just starting. Found a great book:
http://www.amazon.ca/Spiders-North-Amer ... 274&sr=1-2

and the best I can come up with for an ID is a Nursery Web Spider Family: Pisauridae, maybe a Pisaurina sp.
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

DQE
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Post by DQE »

I am unable to see any of the photos linked in this thread. I then turned off most of the things that might have suddenly begun interfering with the forum, but as I expected this had no effect.

Am I the only one who can't see the photos in this thread??? I can see all the photos in other threads on this forum.
-Phil

"Diffraction never sleeps"

rjlittlefield
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Post by rjlittlefield »

DQE wrote:I am unable to see any of the photos linked in this thread. I then turned off most of the things that might have suddenly begun interfering with the forum, but as I expected this had no effect.

Am I the only one who can't see the photos in this thread??? I can see all the photos in other threads on this forum.
There seems to be some problem with image permissions at the moment. I'm getting weird results in other places also.

--Rik

DQE
Posts: 1653
Joined: Tue Jul 08, 2008 1:33 pm
Location: near Portland, Maine, USA

Post by DQE »

rjlittlefield wrote:
DQE wrote:I am unable to see any of the photos linked in this thread. I then turned off most of the things that might have suddenly begun interfering with the forum, but as I expected this had no effect.

Am I the only one who can't see the photos in this thread??? I can see all the photos in other threads on this forum.
There seems to be some problem with image permissions at the moment. I'm getting weird results in other places also.

--Rik
All photos are visible now.
----------------------------------------------

Delightful photos. I love the lighting and the overall appearance as well as the detail.
-Phil

"Diffraction never sleeps"

rjlittlefield
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Post by rjlittlefield »

DQE wrote:All photos are visible now.
Yep. More details at http://www.photomacrography.net/forum/v ... hp?t=19015.

--Rik

andre reichmann
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Post by andre reichmann »

very nice stuff.

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