Pyrenomonadales

Chroomonas (crow-owe-moan-ass) is one of the cryptomonad flagellates with blue-green plastids. The inclusions are mostly polysaccharide (starch) storage. Two flagella are visible at top (anterior) and the cell surface is irregular because of the small skeletal plates that lie under the cell membrane. With posterior pyrenoid. This may be Chroomonas mesostigmata. Differential Interference Contrast. data on this strain.

Chroomonas, a blue-green cryptomonad flagellate. Cell is ovoid with two nearly equal-length flagella which emerge from a subapical vestibulum. The flagella can be seen in the invaginated gullet anteriorly. A contractile vacuole is seen adjacent to the gullet on the left. A cup shaped chloroplast contains Cr-phycocyanins, imparting the blue-green color. The periplast of Chroomonas, contains delicate plates sometimes visible on light microscopy as subtle serrations but not seen in this image. Ejectisomes are present along the gullet (small group of refractile granules on the organism's left anteriorly in this image) and beneath the periplast. A stigma is present in some species. Round starch granules are visible peripherally. From temporary rainwater pool near Boise, Idaho. Oblique illumination.

This little cryptomonad was found accompanied by Synura uvella. For details see ZIP archive. Collection from littoral region (stand of Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.

This little cryptomonad was found accompanied by Synura uvella.The picture shows clearly the two flagellae, contractile vacuole, the area of ejectosomes, nucleus (n), stigma, and the pyrenoid covered with amylum (cp). The bright dot represents the Maupas body (Mb). Collection from littoral region (stand of Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.

Proteomonas (pro-tea-owe-moan-ass) sulcata, a small cryptophyte = cryptomonad, in which the plastids have a red colour from phycoerythrin pigments. Two flagella emerge from the supapical opening of a broad channel. The channel is underlain with extrusible bodies, ejectisomes. Body with refractile polysaccharide storage materials. Differential interference microscopy. data on this strain.

Proteomonas (pro-tea-owe-moan-ass) sulcata, a small cryptophyte = cryptomonad, in which the plastids have a red colour from phycoerythrin pigments. Two flagella emerge from the supapical opening of a broad channel. The channel is underlain with extrusible bodies, ejectisomes. Body with refractile polysaccharide storage materials. Differential interference microscopy. data on this strain.

Surface detail of the cryptomonad flagellate, Rhodomonas (Karsten,1898). The inner layer of the periplast is composed of overlapping rounded or square proteinaceous organic plates about 0.4 um in diameter. This specimen was collected from a commercial saltwater aquarium in Boise, Idaho, September 2004. DIC. 

Portrait (lateral view) of the cryptomonad flagellate, Rhodomonas (Karsten,1898). The cells are laterally flattened. The anterior end is obliquely truncate and the posterior rounded. Two subequal flagella insert into a ventral furrow-gullet complex. A single contractile vacuole is seen adjacent to the anterior opening of the ventral furrow. The inner layer of the periplast is composed of overlapping rounded or square proteinaceous organic plates about 0.4 um in diameter. There is a single large boat-shaped chloroplast with a small pyrenoid. Although not always this color, this species is red due to a chloroplast containing Cr-phycoerythrin 545. Like other cryptomonads, ultrastructural studies of Rhodomonas reveal a nucleomorph associated with the plastid. The nucleomorph is thought to represent a nuclear remnant of an ancestral endosymbiotic red alga. The function, if any, of the nucleomorph is unknown. Large ejectosomes are seen here lining the ventral furrow-gullet. Rhodomonas is phototrophic. This genus is found in both freshwater and marine habitats. This specimen was collected from a commercial saltwater aquarium in Boise, Idaho, September 2004. DIC. 

Rhodomonas (row-doe-moan-ass) salina, a cryptomonad / cryptophyte alga, with red coloured plastids, two flagella (not well imaged here) arise in a wide channel which opens near the front of the cell. Differential interference microscopy. data on this strain.

Rhodomonas (row-doe-moan-ass) salina, a cryptomonad / cryptophyte alga, with red coloured plastids, two flagella, visible upper left, arise in a wide channel which opens near the front of the cell. With starch inclusions. " " Differential interference microscopy.

Rhodomonas (row-doe-moan-ass) salina, a cryptomonad / cryptophyte alga, with red coloured plastids, two flagella arise in a wide channel which opens near the front of the cell. The cell surface is underlain by a layer of stiffening plates, and the texture of these can be seen in places in this micrograph. Differential interference microscopy. data on this strain.

Geminigera (gem-in-idge-err-a) is a cryptomonad flagellate. As with other cryptomonads, the two flagella insert into a groove or pocket which extends a short way into the cell. The pocket is lined with extrusiible bodies called ejectisomes. With reddy-coloured plastids. DIfferential interference microscopy.

Geminigera (gem-in-idge-err-a) is a cryptomonad flagellate. As with other cryptomonads, the two flagella insert into a groove or pocket which extends a short way into the cell. The pocket is lined with extrusiible bodies called ejectisomes. With reddy-coloured plastids. Phase contrast microscopy.

Chroomonas spec. Collection from littoral region (reed belt by Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany) Latitude: 54.304095 Longitude: 10.086073 Aus der von Schilf bewachsenen Uferzone eines Regenrückhaltebeckens in Kiel. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Chroomonas spec. This little cryptomonad (length without flagellum appr. 8 µm) was found accompanied by Synura uvella. The picture shows clearly the two flagellae, contractile vacuole, the area of ejectosomes, nucleus (n), stigma, and the pyrenoid covered with amylum (cp). The bright dot represents the Maupas body (Mb). Collection from littoral region (reed belt by Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany) Latitude: 54.304095 Longitude: 10.086073 Diese kleine Cryptomonade (Länge ohne Flagellum ca. 8 µm) wurde in einer Synura-Kolonie gefunden. Deutlich zu sehen sind die zwei Geißeln, die kontraktile Vakuole, der Bereich der Ejectosomen (4 Punkte rechts neben der kontraktilen Vakuole), Kern (n), der Augenfleck (Stigma), und der beschalte Pyrenoid (mit Stärke abgedeckt; cp). Der helle Punkt repräsentiert den Maupas-Körper (Mb). Aus der von Schilf bewachsenen Uferzone eines Regenrückhaltebeckens in Kiel. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Description: English: Strombidium rassoulzadegani fed four food algae that supported positive growth in the light (12:12 L:D). (A) S. rassoulzadegani fed Tetraselmis chui PLY429; arrowheads indicate different shapes and sizes of retained chloroplasts; (B) S. rassoulzadegani fed Rhodomonas lens RHODO; arrowheads as in A; (C) S. rassoulzadegani fed Isochrysis sp. ISO SP; arrowheads as in A; (D) S. rassoulzadegani fed Prorocentrum minimum JA; note that no retained plastids appear in the cell. Arrow marks the rigid wall of the algal cell and arrowhead marks the partially-digested algal cytoplasm. Date: 12 June 2018. Source: Fig. 6 at https://www.frontiersin.org/articles/10.3389/fmars.2018.00205/full Strombidium rassoulzadegani: A Model Species for Chloroplast Retention in Oligotrich Ciliates. In: Front. Mar. Sci., doi:10.3389/fmars.2018.00205 . Author: George B. McManus, Weiwei Liu, Rachel A. Cole, Daniel Biemesderfer and Jennifer L. Mydosh. Other versions: .

Description: English: Schematic drawing of the ultrastructure of Guillardia theta based on McKerracher & Gibbs (1982). Chl, chloroplast; N, nucleus; Nm, nucleomorph; Py, pyrenoid; S, starch; Mt, mitochondria; G, Golgi body. The nucleomorph is located in the PPC between the outer chloroplast envelope (white arrowheads) and the periplastidal membrane (black arrowheads). Date: 24 May 2017. Source: Fig. 1b (extract) at https://www.nature.com/articles/s41598-017-02668-2 Regulation of chloroplast and nucleomorph replication by the cell cycle in the cryptophyte Guillardia theta. In: Scientific Reports volume 7, Article number: 2345. doi:10.1038/s41598-017-02668-2 . Author: Ryo Onuma, Neha Mishra, Shin-ya Miyagishima. Other versions:.