By Ames H.T., Spackman W.
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Additional resources for Catalog of fossil spores and pollen. Volume 42. Cretaceous Spores and Pollen from the U.S.A. and the U.S.S.R
I. in diameter and becoming \"errucate to finely tuberculate in a few specimens. eplolepidilcs 1'eTrIICalllS 1Couper from the Jurassic of Xc\\' Zealand (Couper, 1953) ancl the Cretaceous of Eastern Australia (Cookson and Dettmann, 1958); it differs from t hi,; species, however, by its reduced ornamentation on the proximal surface; in Leplotcpiditcs the ornamentation is equally developed on both sides. OCC1lrrf'llre: Rare; sample frequency lo\\'; not restricted to any zone. I/%lyp(': Slide St. 5~plale 15, Jig, 1.
6; pI. 16, fig. 1 The spores and pollen of the Potomac Group of Maryland: Dept. , Mines and Water Resources, Bull. , 7 tabs. , 2 mi. SW of Hazelwood Ave. intersection, "Station 49" T~ horizon: Cretaceous, Potomac Group, Patuxent-Arundel contact (sample Lithology suggests Arundel Clay) Preparation: All samples collected from unconsolidated sediments which were easily disaggregated by crushing in a mortar with distilled H20. Organics separated by flotation in ZnC12 sol. 0 sp. ). , oxidized 20 min.
HnllllYJle, slide St. 1, note thickening at the ends. Description: Polysulcate pollen; outline elliptical with narrow ends; sculpture consisting of 10-14 alternating ridges and furrows, the ridges convergingat the. 5 p. wide, ca. 1 p. 5 p. apart. 5 p. thick. ; 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.
Catalog of fossil spores and pollen. Volume 42. Cretaceous Spores and Pollen from the U.S.A. and the U.S.S.R by Ames H.T., Spackman W.