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Record: oai:ARNO:505993

AuthorKerst Th. Boersma
TitleOn the basal structure of Siphonodella cooperi Haas, 1959 and Siphonodella lobata (Branson & Mehl), 1934
JournalLeidse Geologische Mededelingen
Volume49
Year1973
Issue1
Pages39-47
ISSN0075-8639
AbstractScanning Electron Microscope photographs of Siphonodella cooperi and Siphonodella lobata suggest that basal pits decrease in size after having reached a maximum. Analysis of biom├ętrie data and computed regression lines confirm this. The phenomenon is explained by postulating migration of the plane of separation between the conodont and the basal plate, downwards in the holoconodont.
Document typearticle
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