Cylindrobulloidea
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Cylindrobulloidea Thiele, 1931 is a taxonomic suborder of small shelled sea slugs, marine opisthobranch gastropod mollusks in the order Cephalaspidea, the headshield slugs.
The suborder Cylindrobulloidea used to be recognized as monogeneric suborder; in other words there was only one family in the suborder, the family Cylindrobullidae and one e genus Cylindrobulla.
It was treated by Jensen (1996) [1] as a sister group of Sacoglossa. However, a recent systematic review by Paula Mikkelsen (1998) [2] has argued that the genus Cylindrobulla actually belongs in Cephalaspidea, where it forms a monophyletic group Oxynoacea with the shelled sacoglossans. This change in taxonomy was suggested on the basis of the similarity in many characteristics: digestive, sexual, pallial (= concerning the mantle), and the nervous system.
Finally, in the new taxonomy of Bouchet & Rocroi (2005), it has been classed in a separate Group Cylindrobullida.
[edit] References
- ^ Jensen, K.R. (1996). "Phylogenetic Systematics and classification of the sacoglossa (Mollusca, Gastropoda, Opisthobranchia)". Philosophical Transcactions of the Royal Society 351.
- ^ Mikkelsen, P.M. 1998. Cylindrobulla and Ascobulla in the western Atlantic (Gastropoda, Opisthobranchia, Sacoglossa): systematic review, description of a new species, and phylogenetic reanalysis. Zoologica Scripta, 27(1): 49-71.
