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1 Tree was published in this study

A molecular clock for coccolithophores and implications for selectivity of phytoplankton extinctions across the K/T boundary
Young, Medlin, Saez. (2007). Mar. Micropaleontol..
Pleurochrysis dentata Chrysotila scherffelii Chrysotila placolithoides Chrysotila carterae Pleurochrysis gayraliae Pleurochrysis elongata Hymenomonas globosa Hymenomonas coronata Reticulosphaera Ochrosphaera Jomonlithus littoralis Helladosphaera Calyptrosphaera Calcidiscus Umbilicosphaera hulburtiana Umbilicosphaera sibogae var. foliosa Umbilicosphaera sibogae Coccolithus pelagicus Cruciplacolithus Algirosphaera robusta Helicosphaera carteri Scyphosphaera apsteinii Syracosphaera pulchra Isochrysis galbana Chrysotila lamellosa Pseudoisochrysis Isochrysis litoralis Dicrateria Emiliania Chrysochromulina Coronosphaera Chrysochromulina scutellum Chrysochromulina parva Prymnesium Imantonia Phaeocystis jahnii Phaeocystis antarctica Exanthemachrysis Pavlova Coscinodiscus
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