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| | Cephalopods in Action--Young, Vecchione and Donovan, 1998 (Site not responding. Last check: 2007-09-11) |
 | | The sister-group relationship between the Neocoleoidea and the Belemnoidea has been established, but requires further confirmation; 3. |
 | | The dates of origin of the Belemnoidea, Neocoleoidea, Sepioidea and fossil teuthoids have been extended to considerably earlier times. |
 | | The major unsolved phylogenetic problems in need of immediate attention are the position of the Myopsida, relationships within the Sepioidea, the identification of basal nodes with the Oegopsida, and the relationships of most "fossil teuthoids." |
| www.mnh.si.edu /cephs/yvd98/yvd98.html (344 words) |
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