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Florida, United States
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Edgewood, Florida, United States
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Horbury, England, United Kingdom
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Horbury, England, United Kingdom
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Horbury, England, United Kingdom
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Horbury, England, United Kingdom
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Ossett, England, United Kingdom
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Clifton, Florida, United States
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Sandalwood Mobile Home Park, Florida, United States
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Iowa City, Florida, United States
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Ossett, England, United Kingdom
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Dorataspid acantharean, the cytoplasm is attached to the radiating strontium sulphate spicules by contractile myonemes. The outer cytoplasm (ectoplasmic layer) is filled with vacuoles, and most of the cytoplasmic organelles are located within the central capsule which is orange. The acantharea are one of the four types of large amoebae which occur in the marine water column. Dark ground image by Linda Amaral Zettler.
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Acantharean, the cytoplasm is attached to the radiating spicules by contractile myonemes. Most of the cytoplasmic organelles are located within the central capsule. The acantharea are one of the four types of large amoebae which occur in the marine water column. Dark ground image by Linda Amaral Zettler
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Acantharean cyst, the radiating spicules have been resorbed, and the organism cannot be identified in this state. The acantharea are one of the four types of large amoebae which occur in the marine water column. Scanning electron micrograph by A. F. Michaels.
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Acantharean skeleton, the skeletal material is strontium sulphate - and there are normally 20 radiating spicules but they may give rise to side branches to form more elaborate structures. The acantharea are one of the four types of large amoebae which occur in the marine water column. Scanning electron micrograph by A. F. Michaels.
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Acantharean, the cytoplasm is attached to the radiating spicules by contractile myonemes. The outer cytoplasm is filled with vacuoles, and most of the cytoplasmic organelles are located within the central capsule. The acantharea are one of the four types of large amoebae which occur in the marine water column. Dark ground image by Dave Caron
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Acantharean, the cytoplasm is attached to the radiating spicules by contractile myonemes. The outer cytoplasm is filled with vacuoles, and most of the cytoplasmic organelles are located within the central capsule. The acantharea are one of the four types of large amoebae which occur in the marine water column. Dark ground image by Dave Caron
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Acantharean, the cytoplasm is attached to the radiating spicules of strontium sulphate by contractile myonemes. The acantharea are one of the four types of large amoebae which occur in the marine water column. Dark ground image by Dave Caron
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Conidia (spores) of the deuteromycotan fungus, Alternaria alternata (FRIES,1832) KEISSLER,1912. The conidia are obclavate (shaped like a bowling pin) and form single file chains as seen here. The spores have both longitudinal and horizontal septae. Each conidium tapers into a narrow rounded protuberance. Alternaria digests cellulose and is commonly found on dead grasses. Some species are plant pathogens causing "early" potato and tomato blight and leaf rot. The Irish potato famine of 1845-1849 was due to inection by a different fungus, Phytophthora infestans which causes "late" blight.These specimens of A. alternata were found at the margins of a slow-moving freshwater stream in Boise, Idaho.Since A. alternata is terrestrial and not aquatic, the water was probably contaminated by airborne conidia.Phase contrast.
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Conidia (spores) of the deuteromycotan fungus, Alternaria alternata (FRIES,1832) KEISSLER,1912. The conidia are obclavate (shaped like a bowling pin) and form single file chains as seen here. The spores have both longitudinal and horizontal septae. Each conidium tapers into a narrow rounded protuberance. Alternaria digests cellulose and is commonly found on dead grasses. Some species are plant pathogens causing "early" potato and tomato blight and leaf rot. The Irish potato famine of 1845-1849 was due to inection by a different fungus, Phytophthora infestans which causes "late" blight.These specimens of A. alternata were found at the margins of a slow-moving freshwater stream in Boise, Idaho.Since A. alternata is terrestrial and not aquatic, the water was probably contaminated by airborne conidia.DIC
