Palynology of Middle Tertiary lacustrine deposits

Palynology of Middle Tertiary lacustrine deposits 239
Eocene (Messel near Darmstadt); Late Eocene-Early Oligocene (Hessen);
Middle Oligocene (Bergisch Gladbach); Miocene (Oberpfalz, Hessen,
Rhineland); Miocene-Pliocene (Rhineland).
Hungary: Early Eocene (Halimba); Middle Eocene (Dorog,
LabaUan,
Tatabanya, Oroszlany, Iszkaszentgyorgy, Varpalota, Dudar); Late Eocene
(Budakesz, Csillaghegy; Matyas Hill); Miocene (Fat, Eger, N6graszakal,
RakoskeresztUr) .
Belgium: Early Oligocene (Henis).
Remarks: C. megaexactus looks like C. exactus, but the former is larger than the
later.
Botanical affinity: Cyrillaceae, Cyrilla.
Genus Margocolporites Ramanujam 1966 ex Srivastava 1969.
Type species: Margocolporites tsukadai Ramanujam 1966.
Margocolporites vanwijhei Germeraad, Hopping & Muller
PI. 19, figs. 1a-b.
1968 MargocoljJorites vanwijhei Germeraad, Hopping & Muller, Rev. Pa1aeobot. PalynoI.,
vol. 6, no. 3/4, p. 342, pI. XVIII, 3.
Diagnostic characters: Tricolporate pollen grain of almost circular contour in polar
sight. Margocolpus broad, embracing 18- 20 pm of the near-eqautorial circumstance,
gradually tapering towards apices, baculate O. 5 pm long) and framed
by a strengthened wall (margo, 2 - 3 pm in width). Round endexinous pores, 5
pm in diameter. Endexine O. 5- 1 pm thick; columella 2. 5 pm high; mesocolpium
tectate-reticulate; lumina 2 - 2.5 pm wide at equator, 1 -1.5 pm wide at apices.
Measurements: 49 X 47 pm in equatorial diameters.
Previous records: Caribbean: Middle Eocene-Pleistocene; Nigeria: Late Eocene­
Oligocene; Borneo: Late Eocene-Pleistocen.
Remarks: The single specimen which was observed is very similar to the pollen of
Caesalpinia coriaria Wildenow (Fabaceae).
Botanical affinity: Fabaceae (Leguminosae), Caesalpinia.
Genus Bombacacidites Couper 1960.
Type species: Bombacacidites bombaxoides Couper 1960.
Bombacacidites africanus n. sp.
PI. 19, figs. 2 - 3; pI. 34, fig. 3.