Crown-group asteroid phylogeny: An enduring quandary

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The phylogeny of crown-group asteroids has been problematic since the Mortensen-MacBride debate of the 1920s in spite of the availability of many lines of evidence. Understanding has not been clarified by recent molecular approaches. The fossil record is too scanty to provide more than timing, ideas on trends, and infrequent "jackpot" fossils. Development and comparative anatomy of soft parts has been neglected in recent years. Skeletal data, especially that of the ambulacral column, continues to be promising. Ossicular variation at all levels must be addressed, probably using computer-imaging techniques accompanied by statistical analyses, as has been done for other phyla. Work to date has focused on family-level exemplars; treatment of all available genera within families and species within genera is needed.

Original languageEnglish (US)
Title of host publicationEchinoderms
Subtitle of host publicationDurham - Proceedings of the 12th International Echinoderm Conference
Number of pages4
StatePublished - 2010
Event12th International Echinoderm Conference - Durham, NH, United States
Duration: Aug 7 2006Aug 11 2006

Publication series

NameEchinoderms: Durham - Proceedings of the 12th International Echinoderm Conference


Conference12th International Echinoderm Conference
Country/TerritoryUnited States
CityDurham, NH

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics


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