
• (n.) A genus of marine annelids, believed to be an ancient or ancestral type. It is remarkable for its simplicity of structure and want of parapodia. It is the type of the order Archiannelida, or Gymnotoma. See Loeven`s larva.
Found on
http://thinkexist.com/dictionary/meaning/polygordius/

(from the article `annelid`) ...or absent; size, minute. Contains 4 groups of poorly known species considered separate orders by some (Nerillida, Dinophilida, Polygordiida, ...
Found on
http://www.britannica.com/eb/a-z/p/90
Pol`y·gor'di·us noun [ New Latin See
Poly- , and
Gordius .]
(Zoology) A genus of marine annelids, believed to be an ancient or ancestral type. It is remarkable for its simplicity of structure and want of parapodia. It is the type of the order Archiannelida, or Gymnotoma. See...
Found on
http://www.encyclo.co.uk/webster/P/121

The polygordius are archiannelida.
Found on
http://www.probertencyclopaedia.com/browse/BPA.HTM
No exact match found.