Two new testate amoebae

[btschumy]

Yesterday I stumbled upon two testate amoebae that I haven't encountered before. They were found in some decomposed algae I collected last weekend. The first is, I believe Paulinella sp.

The organism is 25 µ long. Image was taken afocal through 40x achromatic objective, 10x eyepiece.

Testate_Amoeba_Paulinella.jpg (91.88 KiB) Viewed 2134 times

Here is what the site Arcella.nl has to say about it.
http://www.arcella.nl/paulinella-chromatophora



The second critter I'm not sure about. It doesn't quite look like a testate amoeba to me except for the obvious pseudopods. It is 74 µ, also taken afocal with a 40x objective and 10x eyepiece.

Testate_Amoeba_Unknown.jpg (211.04 KiB) Viewed 2134 times

This might be Archerella. It is the right size. The species has two pseudostomes at opposite ends of the test. The way this creature is oriented, one might be underneath near the bottom of the image and the other is possibly the circular region at the upper right.

Here is the page on it:
http://www.arcella.nl/archerella-flavum