Future-proofing the Cenozoic macroperforate planktonic foraminifera phylogeny of Aze & others (2011)
Fig 19
Using pop-ups to detail linkages between morphospecies and lineage trees, 1.
Linkages invoked (or not) between a range point of a lineage and that of a morphospecies. Two Ypresian (Eocene) lineages (from Fig 2 in [7]; see also Fig 6 herein) exemplify budding of lineages linked, and not linked, to related morphospecies range points. Left part, portion of the transferred lineage tree (Fig 11B herein); right parts, “Stratigraphic Range” portions of pop-ups. Lower right part. Linking of lineages to morphospecies: the pop-up for lineage N88-N89-N90-T93. In the 2011 study the budding of lineage N88-N89-N90-T93 matched the lowest occurrence of Morozovella subbotinae (the origin of subbotinae–marginodentata–gracilis, Fig 2C in [7], lined up with that of M. subbotinae, Fig 2B in [7]; any morphological intergradation between M. subbotinae and M. aequa was of negligible duration on this temporal scale). The pop-up for lineage N88-N89-N90-T93 indicates that its Lowest Occurrence is herein matched to that of M. subbotinae, and now the (precalibrated) date for this lineage range point would follow any changes made to this morphospecies range point (for an instance of such a change, see the Lowest Occurrence of lineage N5-N6-N8-T9, Fig 14, right figure).Upper right part. Retaining a lineage range point, unlinked to that of a morphospecies: the pop-up for lineage T91. In the 2011 study the budding of lineage T91 from lineage N88-N89-N90-T93 corresponded to the breakdown of morphological intergradation between M. subbotinae and M. marginodentata, which was considered to have occurred later than the appearance of the latter (the origin of marginodentata, Fig 2C in [7], lined up with the upper limit of the grey intergradation interval drawn between M. subbotinae and M. marginodentata, Fig 2B in [7], but not with any of the morphospecies range points). The pop-up for lineage T91 indicates its Lowest Occurrence is herein retained and not directly linked to any morphospecies range point; nevertheless the retained date is employed against the time scale used for a nominated morphospecies point (in this case, the lowest occurrence of M. marginodentata).