Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician Receptaculitid
by Daniel C. Fisher
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Ischadites dixonensis (Miller and Gurley, 1896), from the Ordovician Galena Group of Illinois, is the oldest described North American ischaditid. The holotype is exceptionally well preserved and provides information on merome head morphology, articulation, and arrangement on the surface of the thallus. Meromes occur in whorls and form an equal number of dextral and sinistral parastichies. Each parastichy begins either at one of the heads surrounding the basal pole or at a triangulum, and extends to the margin of a clearly demarcated apical lacuna. The unusually complete morphological characterization that is now available for I. dixonensis will play an important role in discussions of receptaculitid morphogenesis and orientation.
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Fossil Algae, Ordovician, Paleobotany, Ischadites dixenensisShowing 2 featured editions. View all 2 editions?
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Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician receptaculitid
1978, Field Museum of Natural History
in English
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Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician Receptaculitid
1978, Field Museum of Natural History
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| October 15, 2020 | Edited by MARC Bot | import existing book |
| February 10, 2012 | Edited by ImportBot | import new book |
| December 5, 2010 | Edited by Open Library Bot | Added subjects from MARC records. |
| April 28, 2010 | Edited by Open Library Bot | Linked existing covers to the work. |
| December 10, 2009 | Created by WorkBot | add works page |