1) Taxon 2) Taxonomic category 3) Taxonomic group 
• (n.) A group intermediate in importance between an order and a subclass.
Su`per·or'der noun (Zoology) A group intermediate in importance between an order and a subclass. 
[n] - (biology) a taxonomic group ranking above an order and below a class or subclass
noun (biology) a taxonomic group ranking above an order and below a class or subclass
a category of related orders within a class or subclass.