H
Helen Tappan
Researcher at University of California
Publications - 9
Citations - 4144
Helen Tappan is an academic researcher from University of California. The author has contributed to research in topics: Type species & Cladogenesis. The author has an hindex of 7, co-authored 9 publications receiving 3988 citations.
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Foraminiferal Genera and Their Classification
Alfred R. Loeblich,Helen Tappan +1 more
TL;DR: Systematic descriptions of family group taxa based on genera of uncertain status and available family-group names used for foraminifera and genera erroneously regarded as foraminifers.
Journal ArticleDOI
Foraminiferal evolution, diversification, and extinction
Helen Tappan,Alfred R. Loeblich +1 more
TL;DR: In this article, six species of Platycrinites and one species of Eucladocrinus are considered valid in the Keokuk Limestone through St. Louis Limestone of the stratotype area.
Journal ArticleDOI
Suprageneric classification of the foraminiferida protozoa
Alfred R. Loeblich,Helen Tappan +1 more
TL;DR: A revised classification is presented for the Foraminiferida, combining the results of the authors' research with various partial or more inclusive reclassifications that have appeared during the past two decades.