Chaetogaster, a F/W worm (Annelida: Naididae)

Images made through a microscope. All subject types.

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NikonUser
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Location: southern New Brunswick, Canada

Chaetogaster, a F/W worm (Annelida: Naididae)

Post by NikonUser »

These are omnivorus worms that eat a variety of organisms and, in that sense, are predatory.
Features include chaetae (spines) restricted to the ventral surface and a large pharynx (part of the feeding system).
I'm not sure of the anatomy but I believe the pharynx is the space immediately behind the mouth, followed by what looks like a very narrow tube leading the the large sac-like 'stomach' with food in the posterior half.
In a large dish these worms appear as one continuous worm; put them on a microscope slide under a coverglass and they start to break up into 2 or 3 pieces each of which appears to be alive.

Olympus BHS DIC 10x S Plan Apo, 1.25x intermediate tube, 2.5x NFK relay lens, flash, single frame.
Image
NUM10118
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

Mitch640
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Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

Very interesting. I know nothing about DIC or how you use it, but are you using coverslips, and if so, are you using grease to lift them up? Can you even do that with DIC?

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