MicrobeHunter.com Microscopy Forum

You can also access this page with: www.microscopy-forum.com
It is currently Sun Sep 23, 2018 12:20 pm

All times are UTC




Post new topic  Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Chaetogaster Diaphanus
PostPosted: Thu Jul 12, 2018 9:49 am 
Offline

Joined: Fri Jun 29, 2018 7:42 am
Posts: 65
Location: New Zealand
Hi folks,
This critter came out of the debris from the bottom of a water trough.
It appeared to graze on the pieces of algae as it swam around.
It was possibly 5mm long.
Head is to the right.
Thanks
Grahame


Attachments:
Crawler-Head_GNZ20180712-2291.jpg
Crawler-Head_GNZ20180712-2291.jpg [ 107.06 KiB | Viewed 329 times ]
Crawler_GNZ20180712-2268.jpg
Crawler_GNZ20180712-2268.jpg [ 82.98 KiB | Viewed 329 times ]


Last edited by Grahame on Tue Jul 17, 2018 7:25 am, edited 1 time in total.
Top
   
 Post subject: Re: Freshwater Crawler
PostPosted: Thu Jul 12, 2018 4:10 pm 
Offline
User avatar

Joined: Sun Oct 12, 2014 2:34 am
Posts: 4902
Location: Estepona
Guessing ... Worm, possibly Aquatic Oligochaeta

see link: Tools for identifying Australian aquatic oligochaetes of the families
Phreodrilidae, Lumbriculidae and Capilloventridae (Clitellata: Annelida)

https://museumsvictoria.com.au/media/38 ... ne2013.pdf

_________________
Zeiss Standard WL & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)


Top
   
 Post subject: Re: Freshwater Crawler
PostPosted: Thu Jul 12, 2018 8:44 pm 
Offline

Joined: Fri Jun 29, 2018 7:42 am
Posts: 65
Location: New Zealand
Thanks 75RR,
Interesting pdf.
It may have given me the id of another thing I've seen a couple of times, looks like they could be worm egg sacs.


Top
   
 Post subject: Re: Freshwater Crawler
PostPosted: Fri Jul 13, 2018 8:56 pm 
Offline

Joined: Thu Apr 05, 2018 1:06 am
Posts: 83
Location: Idaho
I believe that's Chaetogaster Diaphanus. I successfully cultured these for a short time several years ago.

Edit, C. Diaphanus is an active carnivore, its preferred prey is tiny micro-crustacea. If your specimen was feeding on algae, it might be some other species of genus Chaetogaster.

_________________
Rick

A/O 10 Series Microstar
A/O 4 Series Microstar
A/O 4 Series Phasestar
A/O 4 Series Apostar
A/O Cycloptic Stereo
Several old monocular scopes in more or less decrepit but usable condition


Top
   
 Post subject: Re: Freshwater Crawler
PostPosted: Fri Jul 13, 2018 9:48 pm 
Offline

Joined: Fri Jun 29, 2018 7:42 am
Posts: 65
Location: New Zealand
Hi Rick,
Thanks for the id.
I checked the New Zealand Organisms Register, our list of everything known to live in NZ and Chaetogaster diaphanus does live down here.
The only other is Chaetogaster diastrophus.
There were all sorts of small critters and a few rotifers in that water sample so it's quite possible that what I though was a quick graze on algae was actually grabbing something from under the piece of algae.
I've added an image of what I now think is a worm egg sac.
Any chance this may belong to C. Diaphanus ?
Thanks again :)
Grahame


Attachments:
Worm-Egg-Sac_GNZ2018-07-10-17-36-36.jpg
Worm-Egg-Sac_GNZ2018-07-10-17-36-36.jpg [ 137.58 KiB | Viewed 265 times ]
Top
   
 Post subject: Re: Freshwater Crawler
PostPosted: Sat Jul 14, 2018 1:12 am 
Offline

Joined: Thu Apr 05, 2018 1:06 am
Posts: 83
Location: Idaho
According to Ward & Whipple, and Pennak, Chaetogaster spends much of its time reproducing asexually by growing another zooid behind the active one, and then budding it off. They also lay eggs, but I have no idea what they would look like, and don't recall seeing descriptions of them.

_________________
Rick

A/O 10 Series Microstar
A/O 4 Series Microstar
A/O 4 Series Phasestar
A/O 4 Series Apostar
A/O Cycloptic Stereo
Several old monocular scopes in more or less decrepit but usable condition


Top
   
 Post subject: Re: Freshwater Crawler
PostPosted: Sat Jul 14, 2018 1:36 am 
Offline

Joined: Fri Jun 29, 2018 7:42 am
Posts: 65
Location: New Zealand
Thanks Rick,
The many and varied forms of reproduction never ceases to amaze me.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 7 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited