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All Biocode files are based on field identifications to the best of the researcher’s ability at the time.
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All Biocode files are based on field identifications to the best of the researcher’s ability at the time.
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Portrait of Lobomonas stellata (Chodat), a volvocid flagellate. The ellipsoid to pear-shaped protoplast is separated from the cell wall by a space containing gelatinous material. The cell wall has irregularly spaced conical protrusions. There is one large cup-shaped chloroplast. A pyrenoid is located posteriorly. A peripheral stigma is located in the anterior 1/3 of the cell. Two equal flagella are about the length of the cell body. From freshwater pond near Boise, Idaho. Phase contrast.
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Portrait of Lobomonas stellata (Chodat), a volvocid flagellate. The ellipsoid to pear-shaped protoplast is separated from the cell wall by a space containing gelatinous material. The cell wall has irregularly spaced conical protrusions. There is one large cup-shaped chloroplast. A pyrenoid is located posteriorly. A peripheral stigma is located in the anterior 1/3 of the cell. Two equal flagella are about the length of the cell body. From freshwater pond near Boise, Idaho.DIC.
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Pseudocarteria, a volvocid flagellate distinguished from the similar genus Carteria by absence of an anterior papilla. Four approximately equal-length flagella and single large chloroplast. Prominent stigma. From freshwater pond near Boise, Idaho. Oblique illumination.
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Chlamydomonas (clam-ee-doe-moan-ass) a common volvocid (green alga) flagellate. Cells vary in shape from elongate to rounded, this being one of the more elongate cells. With a cell wall, a cup-shaped chloroplasts with chlorophyll B, a red eyespot located external to the plastid, and two equal flagella emerging from the anterior pole of the cell. Differential interference contrast. Animations by Rosemary Arbur of flagellar beat patterns are available
here. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone Park, photograph by Kathy Sheehan and David Patterson.
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Chlamydomonas (clam-ee-dough-moan-ass) a common volvocid (green alga) flagellate. Cells vary in shape from elongate to rounded, this being one of the more elongate cells. With a cell wall, a cup-shaped chloroplasts with chlorophyll B, a red eyespot located external to the plastid, and two equal flagella emerging from the anterior pole of the cell. These cells undergo a form of sexual reproduction referred to as conjugation in which two similar to near similar cells fuse and exchange genetic information. Animations by Rosemary Arbur of flagellar beat patterns are available
here. Differential interference contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.
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Portrait of Vitreochlamys fluviatilis, formerly Sphaerellopsis fluviatilis. The genus name, Sphaerellopsis (Korchikoff, 1925) was preoccupied by an Ascomycete fungus. This fungus Sphaerellopsis filum (Cooke, 1883) is a hyperparasite of another fungus, willow rust (Melampsora). Batko renamed this volvocid flagellate genus Vitreochlamys. This genus is similar to Chlamydomonas (some consider it synonymous) but differs from it by having a protoplast and surrounding gelatinous sheath that are fusiform. There are two equal length flagella. The nucleus is central. There is a large cup-shaped chloroplast and a posterior pyrenoid. Two anterior contractile vacuoles are located near the flagellar bases. There is a small anterior stigma. From a freshwater pond near Boise, Idaho. Oblique illumination.
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Portrait of the planktonic green alga Errerella bornhemiensis Conrad, 1913. Clusters of spherical cells are arranged in pyramidal clusters. Each cell bears one stout spine on its free face. Single cup-shaped chloroplast. The similar Micractinium has multiple finer spines on each cell. Collected from freshwater pond near Boise, Idaho July 2004. DIC.
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In vivo portrait of the volvocid flagellate, Volvulina steinii Playfair,1915. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho 43°36'49.03" N 116° 13' 23.77" W elev. 2674 ft.March 2006.Brightfield.
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Portartit of the volvocid flagellate, Volvulina steinii Playfair,1915. The cells are hemispherical with the flattened face of each toward the exterior in contact with the thin investing gelatinous envelope.The inner limit of the envelope is visible here. the thickness of the investing layer of the gelatinous envelope is indicated here by debris adhering to its exterior surface.Each of the 16 cells in the colony bears two equal-length flagella (seen here in the cell at 12 o'clock). Only cells at the "anterior" end of the colony have eyespots. each cell has two contractile vacuoles (seen here in the cell at 12 o'clock.Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho In vivo portrait of the volvocid flagellate, 43°36'49.03" N 116° 13' 23.77" W elev. 2674 ft. elev. 2674 ft. March 2006. DIC.
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Fusola viridis; Oocystia borgei; Chordatella citriformis; Pleurococcus regularis Artari.
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Melgar de Tera, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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Melgar de Tera, Castille and Leon, Spain
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Scale bar indicates 25 m.Sample from the bog Mittermoos near Pillersee (Tyrol, Austria). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with DSLR Canon EOS 600D.For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Akinets of Haematococcus pluvialis in darkfield, This algae morphes into the akinet form when environmental condictions get bad and produces the red carotenoid astaxanthin to protect itselft from the sun.
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Closeup of a zygote. Mucilaginous sheath is visible. Scale bar indicates 50 m. Sample from ponds situated in the vicinity of Lake Constance. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Covaleda, Castille and Leon, Spain
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Casas de Fadoncino, Castille and Leon, Spain
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Alcala De Guadaira, Andalusia, Spain
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Sobrado, Galicia, Spain
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Camargo, Cantabria, Espaa