Subclass CYCLOCOELA Krumbach, 1925
Compiler and date details
30 April 2007 - Lisa-ann Gershwin
Introduction
The name Cyclocoela was first applied by Krumbach (1925: 939) for Lobata (e.g., Ganesha, Bolinopsis, Ocyropsis) and Cestum. It was ignored until Ospovat (1985) applied the name to the orders Beroida, Cambojiida, Cestida, Cryptolobiferida, Ganeshida, Lobiferida and Thalassocalycida, based on the common feature of the presence of a peristomal system of gastral canals.
The subclass as envisaged by Ospovat is unlikely to be widely adopted, because it groups taxa in a way that is inconsistent with DNA results. The phylogenetic hypotheses generated by molecular analyses by Podar et al. (2001) suggested a closer relationship between the Beroida and some of the Cydippida than to other groups, with the Cydippida being paraphyletic or polyphyletic.
Diagnosis
Tentaculate ctenophores with peristomal system of gastral canals.
Diagnosis References
Ospovat, M. F. 1985. On phylogeny and classification of the type Ctenophora. Zoologicheskii Zhurnal 64(7): 965-974 [974]
General References
Krumbach, T. 1925. Ctenophora. pp. 905-995 in Kukenthal, W. & Krumbach, T. (eds). Handbuch der Zoologie. Berlin : W. de Gruyter Vol. 1
Ospovat, M. F. 1985. On phylogeny and classification of the type Ctenophora. Zoologicheskii Zhurnal 64(7): 965-974
Podar, M., Haddock, S.H.D., Sogin, M. & Harbison, G.R. 2001. A molecular phylogenetic framework for phylum Ctenophora using 18S rRNA genes. Molecular Phylogenetics and Evolution 21: 218-230