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Home / Charophyceae / Filaments / Desmids /Hyalotheca |
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Name derivation: |
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"Glass container" or "Transparent container" (glass (hyalo-) container (-theca) |
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Classification: |
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Hyalotheca Ehrenberg ex Ralfs 1848; 11 of 59 species descriptions are currently accepted taxonomically (Guiry qand Guiry 2014). Order Desmidiales; Family Desmidiaceae |
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Morphology: |
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Cells are cylindrical and appear in single rows connected by the widest end of each cell. Some species’ cells have a narrow central channel. A few species have slight protrusions at the semicell base-either two at each end of the cell or three protrusions evenly spread around the cell. Each cell has two chloroplasts with a pyrenoid (transparent structure). The nucleus is found in the center of the cell between chloroplasts. The smooth cell wall has several lines of side-by-side pores. |
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Similar species: |
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Habitat: |
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Three species are found in North America. H. dissiliens and H. mucosa are common in many areas, but most species are found in acidic, oligotrophic freshwater, including swamps. |
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References: |
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Gerrath JH. 2003. Conjugating Green Algae and Desmids. In: Wehr JD, Robert SG, editors. Freshwater Algae of North America: Ecology and Classification. San Diego (CA): Academic Press. p 376. Guiry, M.D. and G.M. Guiry 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 30 May 2014. |
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