Aquilapollenitesand Some Santalalean Genera

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Abstract
The fossil pollen genus Aquilapollenites, which occurs in most Upper Cretaceous and some Lower Tertiary sediments from the western interior of North America, represents at least two lines of development from a Santalalean stock. One line, which approximates the isopolar forms of the genus, bears a close morphological and probably genetic relationship with the extant plant family Loranthaceae. The second line, which encompasses the heteropolar and subisopolar forms, shares affinity with some members of the Santalaceae, especially the genus Arfona. The parasitic habit of flowering plants was well developed, and was a conspicuous element within the subtropical to warm-temperate forest regions of western North America during the close of the Cretaceous and early Tertiary.

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