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subphylum

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subphylum /sub·phy·lum/ (sub´fi-lum) pl. subphy´la   a taxonomic category between a phylum and a class.
sub·phy·lum (sbflm)
n. pl. sub·phy·la (-l)
A taxonomic category ranking between a phylum and a class.

subphylum [sub-fi´lum] (L., Gr.)
a taxonomic category sometimes established, subordinate to a phylum and superior to a class.

subphylum
pl. subphyla [L.] a taxonomic category sometimes established, subordinate to a phylum and superior to a class.


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Species are grouped within families and in sections divided into order, subclass, class, and subphylum.
It belongs to the subphylum Apicomplexa, class Sporozoa, and exists in nature in 3 forms: the oocyst (which releases sporozoites), the tissue cyst (which contains and may release bradyzoites), and the tachyzoite.
Although the ancient Chinese animals qualify as vertebrates, they lack the bony skeleton and teeth seen in most, but not ail, members of this subphylum today.
 
 
 
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