Favoritos de laneallen

NOT N. bisulcatum, except maybe the first 3. N. bisulcatum sensu strictu has a width range of 8-9 microns. The majority of the specimens here are a similar taxon that has been erroneously lumped into the species concept of N. bisulcatum by many authors over the course of the last century.

Scale bar = 10 µm.

Found alive and well in a culture in our incubator neglected since the onset of the pandemic. Interestingly enough, some cultures contained dead tardigrades and live rotifers. Source material was antarctic algal mats. Photo taken using darkfield.

Featureless transparent disks under PPL, but black interference crosses which maintain their orientation when the stage is spun appear under cross polarized light. The interference crosses may separate in some (typically larger) loricae forming patterns like the stitches on a baseball as the stage is rotated.

Scale Bar = 10 µm

This is a really fun one. This genus is known to frequent aerial habitats such as cave walls. This population was found in a small knothole full of water. I suspect this is NOT O. roeseana, this population is smaller than published dimensions. The diameter ranged from 13.6 - 24.7 µm. I have seen this species in another knothole.

Just a fun collection of diatoms present in my family's farm pond. This plate represents less than a quarter of the taxa present. If you have questions about any of the specimens feel free to ask. All are to scale, and the scale bar = 10 micrometers.