[Taxacom] Phasmida vs Phasmatodea

[Soowon Cho]

Dear members,

Could someone please explain which is right and why?

At the Wikipedia site for "Phasmatodea", it states that Phasmida is
preferred by many authors, though it is incorrectly formed; Phasmatodea is
correctly formed, and is widely accepted.

On the other hand, at the phasmida.speciesfile.org site, it states that
Phasmida is the oldest and simplest name, widely used in the literature and
close to the commonly used name of ‘phasmids’, and considered Phasmatodea a
junior synonym.

Which is right? Why is Phasmida considered, by some researchers, wrongly
formed under the ICZN? Is there a mandatory naming rule for taxonomic rank
above superfamily?

Sincerely,
-- 
Soowon Cho
chosoowon at gmail.com
Dept Plant Medicine
Chungbuk Nat'l Univ
Cheongju, 361-763
KOREA