Anabaena circinalis - Measurement unavailable. probably 400x

Anabaena "laxa" - ID for this complex is of course tenuous--see next entry. Measurement unavailable. probably 400x

Anabaena "laxa" - From the same sample as above, a few weeks later. Note that the akinete is now adjacent the heterocyst. It now keys out to Anabaena "cylindrica". 400x

Anabaena shceremetievi - 400x phase contrast

Anabaena shceremetievi - A slight hint of a sheath is visible. 400x

Anabaena shceremetievi - 400x

Anabaena spherica - 400x

Anabaena spiroides - The line is 20 microns. 200x

Anabaena torulosa - 400x

Anabaena torulosa - Is it Synecococcus? No, it is Anabaena torulosa akinetes. 400x

Anabaena sp. - (Unidentified) No speculations upon the species. 400x

Anabaena sp. - (Unusual and contorted) Akinetes are round, so it is probably not A. circinalis. Could be A. spiroides in an unusual state. 200x.

Anabaena sp. - (Unusual and contorted) The same specimen as above at 100x.

Anabaena sp. - Probably A. scheremetievi, but akinetes were absent. A hint of a sheath is barely visible. 400x

Anabaena sp. - Probably A. circinalis, but akinetes were absent. 1000x

Anabaena sp. - Possibly A. viguieri, but the akinetes are too broad. 400x.

Anabaenopsis circularis - The central pair of heterocysts is clearly visible. 200x

Anabaenopsis circularis - A developing pair of heterocysts is visible in the center of the trichome. Note the bacteria attached to it. 400x (phase contrast)

Anabaenopsis circularis - Same as above without phase contrast. 400x

Aphanizomenon flos-aquae - Akinetes and heterocyst clearly visible. Measurement unavailable. probably 400x

Aphanizomenon flos-aquae - Colony. Measurement unavailable. probably 100x

Aphanizomenon flos-aquae - Colony. Akinetes absent. 400x

Arthrospira jenneri - Cross-walls obscured by cytoplasmic granules (sorry). 400x

Beggiatoa alba - 400x

Beggiatoa alba - Cropped portion of image above at higher resolution.

Chloroflexus sp. - Unknown phytoplankton from a fish pond. Speculation: Chloroflexus. 400x

Chloroflexus sp. - Wider view higher resolution image of specimen above.

Cylindrospermopsis raciborskii - Heterocyst visible. 1000x

Cylindrospermopsis raciborskii - Heterocysts and akinetes visible. 400x

Cylindrospermopsis raciborskii - 400x phase contrast

Cylindrospermopsis raciborskii - Heterocyst visible. 400x

Cylindrospermopsis raciborskii - Akinetes (only) visible. 400x phase contrast

Cylindrospermopsis raciborskii - Heterocyst visible. 400x phase contrast

Cylindrospermum muscicola - 400x

Cylindrospermum muscicola - Surprise! It is not Pseudanabaena, but C. muscicola, without akinetes, but with a developing heterocyst. 400x phase contrast

Eubacterium - Unidentified bacterium pays Euglena a visit. 1000x

"Gloeotrichia" - Akinete and heterocyst clearly visible. Measurement unavailable. 400x

"Gloeotrichia" - Colony. Measurement unavailable. 100x

Lyngbya sp. - (Unidentified) No speculations upon the species. 200x

Lyngbya sp. - (Unidentified) No speculations upon the species. Note that one has no visible sheath. 200x

Lyngbya sp. - Same specimen as above. 400x phase contrast

Lyngbya sp. - (Unidentified) Possibly birgei. 200x

Lyngbya sp. - Social gathering of the above species. 200x

Merismopedia - Colony of Merismopedia (Agmenellum [Drouet], Synechocystis Low GC cluster [Waterbury and Rippka]). 200x

Microcystis sp. - Becoming confluent. 200x

Microcystis sp. - Separate colonies. 200x

Microcoleus sp. - One of those in the anomalous Microcoleus/Symploca/Lyngbya/Take-a-guess range. 400x

Mixture - Oscillatoria cf. chalybea, Planktothrix agardhii, and Anabaena spiroides. 200x

Mixture - Oscillatoria cf. chalybea, Planktothrix agardhii, and Arthrospira jenneri. 200x

Mystery Bug - Truly strange. Spirulina major inside a bundle. 400x

Mystery Bug - Unidentified filament. Is it made of diatoms, desmids, cyanobacteria, or the unknown? 400x

Mystery Bug - Truly strange. Spirulina major inside a bundle. 400x

Mystery Bug - Planktothrix agardhii with a double swollen terminal cell. 200x

Mystery Bug - Another odd Planktothrix agardhii. 400x phase contrast

Mystery Bug - Same as above without phase contrast. 400x

Nostoc (Anabaena) azollae - Heterocyst clearly visible. 400x

Nostoc (Anabaena) azollae - Numerous akinetes visible. 400x

Nostoc sp. - Possible germling. 400x

Nostoc sp. - Possible colony or is it a strange type of Anabaena spherica?. The only thing for sure is that nothing is for sure. 200x

Oscillatoria cf. chalybea - With Planktothrix agardhii, and possible Raphidiopsis sp. 200x

Oscillatoria "chlorina" - Quotes represent the contributor's resentment at identifying cyanobacteria using color. 400x

Oscillatoria geminata - 400x

Oscillatoria princeps - 200x

Oscillatoria princeps - 100x

Oscillatoria princeps - Social gathering with some friends. 200x

Oscillatoria splendida - 400x phase contrast

Oscillatoria sp. - The famous "big Oscillatoria". Species not known. It may be undescribed. 200x

Oscillatoria sp. - Note the granules in the terminal cell, along with its thickened membrane. 400x

Oscillatoria sp. - With the bright light rendering its striking granules more visible. Note the spiral arrangement of the granules. 100x

Oscillatoria sp. - The same specimen as above. 200x

Oscillatoria sp. - At low magnification. 40x

Phormidium retzii - Tentative identification. 200x

Phormidium uncinatum - Tentative identification. 400x phase contrast

Phormidium uncinatum - Same as above without phase contrast. 200x

Planktothrix (Oscillatoria) agardhii - With visible pseudovacuoles. 400x phase contrast

Raphidiopsis curvata - Mixed with some straight chains that are either more Raphidiopsis or Cylndrospermopsis raciborskii without akinetes or heterocysts. 400x

Raphidiopsis cf. mediterranea - Could be R. brookii. 400x

Raphidiopsis curvata - Same as above with phase contrast

Raphidiopsis cf. mediterranea - 100x

Raphidiopsis curvata - 200x

Raphidiopsis cf. mediterranea - Pseudovacuoles clearly visible. 400x phase contrast

Spirulina major - 400x phase contrast