By Ames H.T., Spackman W.
Read Online or Download Catalog of fossil spores and pollen. Volume 42. Cretaceous Spores and Pollen from the U.S.A. and the U.S.S.R PDF
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Additional info for Catalog of fossil spores and pollen. Volume 42. Cretaceous Spores and Pollen from the U.S.A. and the U.S.S.R
Width 12(21)30 p. (to specimens). Comments: Similar to the pollen of Ephedra from Group n of Steeves and Barghoorn (1959). This species difTers from E. 11Iulticostatu}by its less numerous muri and the presence of a thickened area at t he ends. Occurrellce: Found only in sample St. 26. Holotype: Slide St. 8-109. plate 38, ftg. 3. , 1963, p. 90, pI. 38, fig. 3 The spores and pollen of the Potomac Group of Maryland: Dept. , Mines and Water Resources, Bull. , 7 tabs. Type locality: Virginia, Drewrys Bluff on left bank of James River, 4/5 mi.
DeclIssnsporiles lIIicrnreliclI/allls, n. sp. Fig. 7. Holotypc, slide St. 1, proximal polar view. 7a, high focus showing the proximal furrow extending the whole width of the grain. 7b, low focus on the distal surface, longitudinal sulcus visible. Fig. 8. Slide St. 5, proximal view showing the rim enclosing the sulcus; note the widening of the sulcus at the ends. Smooth outline indicates the reticulation is formed below the surface as in other gymnosperms. Fig. 9. Slide St. 3, distal view of another specimen.
Pltcdripilcs pal"ps(oCIIsis, n. sp. Fig. -l. Slide St. <>, specimcn slightly smallcr than thc holotypc, mu ri f uscd at thc cnds. Fig. S. 5-· 117; nolice knob · like slruclurt' showing at one end. Description: Polysulcate pollen; outline broadly elliptical; sculpture consists of five narrow ridges 4-6 JI. high, 3-5 JI. 75-1 JI. wide at the top, 3-4 JI. apart. "t ruet ure, Exine smooth, less than 1 JI. ; maximum width 24(25)26 JI. (10 specimens). Com 1/1 el/Is " The five large and widely ~paeecl muri make thi~ form easily distinguishable from other species ()f Lphedripiles.