Page:Scientific results HMS Challenger vol 18 part 1.djvu/127

This page has been proofread, but needs to be validated.
REPORT ON THE RADIOLARIA
cvii

161. Hypothetical Genealogical Tree of the Spumellaria:—


Larcoidea
Discoidea
Streblonida Phacodiscaria
Tholonida Coccodiscida
Prunoidea
Soreumida
Zygartida
Zonarida
Lithelida Sphæroidea Cyclodiscaria
Spongodiscida
Stylosphærida Pylodiscida
Phorticida

Panartida

Artiscida
Phacodiscida
Spongodruppida
Staurosphærida
Spongel- Pylonida
lipsida
Cyphinida  
Porodiscida
Astrosphærida
Larnacida
Cubosphærida Cenodiscida
Druppulida
Collosphærida Archidiscida
Larnacilla
Spongurida (Trizonium)
 
 
Ellipsida
(Cenellipsis)
Larcarida
(Cenolarcus)
Liosphærida
(Cenosphæra)
Cenodiscida
(Cenodiscus)
 
[Actiprunum?] [Actilarcus?] [Procyttarium] [Actidiscus?]
 
 
Cenosphæra (Common stem-form of all Sphærellaria?)
 
Polycyttaria
Collosphærida Collozoida Sphærozoida Beloidea
 
 
Thalassosphærida
Ethmosphærida
 
 
Colloidea
 
Thalassicollida
 
Actissa