any protozoan parasite of the subphylum Cnidospora. The approximately 1,100 known species are characterized by walled spores with one to four hollow polar filaments. The spore has a multicellular origin—i.e., the cells that produce the spore capsule and the polar filaments before they degenerate may be considered somatic cells with specific functions. Observations indicate that the polar filament is a hollow tube through which the sporoplasm, the infective stage, travels from the spore to a tissue cell of the host where it grows into a plasmodium (a mass of cytoplasm with many nuclei).

      This group is divided into four subgroups; Helicosporida, insect parasites (see Helicosporidium); Actinomyxida, worm parasites (see actinomyxidian); Microsporida, parasites of arthropods including insects (see microsporidian); and Myxosporida, fish parasites (see myxosporidian).

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Universalium. 2010.

Look at other dictionaries:

  • cnidosporidian — cni·do·spo·rid·i·an …   English syllables

  • cnidosporidian — adjective or noun see cnidosporidia …   Useful english dictionary

  • Helicosporidium — ▪ protozoan genus       protozoan parasite genus found in insects. It is the only genus of the cnidosporidian phylum Myxozoa (Myxosporidia). The young live in the body cavity, fat, or nervous tissue of the host insect. The life cycle, which is… …   Universalium

  • myxobolus — mikˈsäbələs noun Usage: capitalized Etymology: New Latin, from myx + Greek bōlos lump more at bole : a genus of cnidosporidian protozoans that includes the causative organism of boil disease of fishes …   Useful english dictionary

  • myxostoma — mikˈsästəmə noun Usage: capitalized Etymology: New Latin, from myx + stoma : a genus of cnidosporidian protozoans containing the organism causing twist disease …   Useful english dictionary

  • pansporoblast — (ˈ)pan+ noun Etymology: pan + sporoblast : a typical cnidosporidian sporont containing two sporoblasts …   Useful english dictionary

  • polar capsule — noun : a specialized cell of a cnidosporidian spore that produces a coiled thread that presumably serves as a temporary attachment organelle when the spore ruptures …   Useful english dictionary

  • sporoplasm — ˈ ̷ ̷ ̷ ̷ˌplazəm noun ( s) Etymology: spor + plasm : a mass of protoplasm that gives rise to or forms a spore; especially : the protoplasmic body that is released as an infective amoebula from a cnidosporidian cyst …   Useful english dictionary

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