Page:Scientific results HMS Challenger vol 18 part 1.djvu/137

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180. Hypothetical Genealogical Tree of the Nassellaria.


Cyrtoidea
Botryodea
Triradiata
Pylobotryida Podocampida
Eradiata Multiradiata Spyroidea
Lithocampida Phormocampida Androspyrida
Lithobotryida Podocyrtida
Theocyrtida Phormocyrtida Tholospyrida
Cannobotryida Tripocyrtida Phormospyrida
Sethocyrtida Anthocyrtida
Tripocalpida
Cyrtocalpida Phænocalpida
Stephoidea
 
Tympanida Zygospyrida
(Spyroidea triradiata)
Tripocalpida
(Cyrtioidea triradiata monocyrtida)
Coronida
Semantida
 
Cyrtellaria
Cortiniscus
Stephanida  
 
 
Cortina * —————— Cortinida (Plectellaria)
(Cortina)
 
Plectaniscus ——— Plagoniscus ———
  Plectoidea
Tetraplecta ——— Tetraplagia ——— Plectanida
 
Plectophora ——— Plagiacantha ———
  Plagonida
Triplecta ——— Triplagia ———
 
Nassoidea
(Nassellida)
 
Nassella
(Cystidium)
 
Actissa