Cestodea (correction)

[Ken Kinman]

TAXACOMERS,
     In a private e-mail, it was pointed out that while Cestoidea includes
most cestodes, Cestoda is a slightly more inclusive taxon (with the
additional basal Orders Gyrocotylida and Amphilinida).
     My Class Cestodea is equivalent to Cestoda in content, and the suffix
emended slightly to match the universal -ea Class suffix which I advocate.
Since the Kinman System does not formally recognize intermediate ranks or
categories, the "Cestoidea" is only informally coded (it is Group 3+ in the
classification below, i.e. everything except Gyrocotylida and Amphilinida).
     Here is the classification from my 1994 book (The Kinman System), but I
cannot say whether it would still reflect the views of systematists six
years later:
   CESTODEA (tapeworms; 3,800 species)
      1  Gyrocotylida (1 family)
      2  Amphilinida (2-3 families)
      3  Pseudophyllida (15-17 families (including
            Haplobothrioida, Carophyllaeida,
            and Spathebothriida)
      4  Nippotaeniida (1 family)
      5  Proteocephalida (3-4 families)
     _a_ Cyclophyllida (14 families (incl. Aporida)
      6  Lecanicephalida (5 families)
             (including Cathetocephalidea)
      7  Tetraphyllida (23 families) (incl. Diphyllida,
             Trypanorhynchida, Tetrabothriida,
             Tetrarhychida, and Dioecotaeniidea)
      ?  Litobothriida (1 family)
******************************************************
     Comments by private e-mail are welcome.  I do not know if Litobothriida
is still incertae sedis or not.
                        ------Ken Kinman
P.S.  The coding "_a_" shows that Proteocephalida paraphyletically gave rise
to Cyclophyllida.  And for those who prefer to split Pseudophyllida into
several orders, they would be coded 3A, 3B, 3C, if they represent a
cladistic sequence.
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Share information about yourself, create your own public profile at
http://profiles.msn.com.