NAME Spirotremesporites simplex
AGE Pleistocene.   AGE span: 2.588...0.0117 mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Amerosporae.
FIGURE(S)
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Pl.4fig.54.jpg
FIGURE REFERENCE Dueñas-Jimenez H. 1979. Estudio palinologico de los 35 mts. superiores de la seccion Tarragona, Sabana de Bogata; Caldasia, v. 12, p. 539-571.
SPECIES, AUTHORITY S. simplex Dueñas-Jimenez 1979, p. 564, pl. 3, fig. 5.
LOCATION Sabana de Bogota, Colombia.
ORIG DESCRIPTION* 9-10 x 20-40 µm (holotype 15 x 37 µm); unicellular, with a single groove running from pole to pole in a spiraling fashion; wall surface smooth, wall ca. 1 µm thick; in some grains one of the sides seems flatter than the other. [Jansonius & Hills (1980), card no. 3769.]

EMENDED DESCRIPTION (Elsik 1990a, p. 165): Aseptate, psilate, fungal spores with a narrowly elliptical to elongate fusiform outline. The outline is slightly reniform in side view due to the surface with the furrow being less convex than the opposite side of the spore. The aperture is an elongate, shallowly S-shaped furrow in plan view; the furrow is not trochoidal or spiral, it is apparently on one side of the spore. Overall size ca. 13 x 37 µm; wall thickness ca. 1.0 µm or less.
COMMENTS* (Elsik): Spirotremesporites simplex Dueñas-Jimenez 1979 is larger than Spirotremesporites disciformis. It is restricted to narrowly fusiform spores.
PUBLICATION REFERENCE Dueñas-Jimenez H. 1979. Estudio palinologico de los 35 mts. superiores de la seccion Tarragona, Sabana de Bogata; Caldasia, v. 12, p. 539-571.

Jansonius J, Hills LV. 1980. Genera file of fossil spores - supplement 4; Special Publication, Department of Geology, University of Calgary, cards 3629-3800.

Elsik WC. 1990. Hypoxylonites and Spirotremesporites, form genera for Eocene to Pleistocene fungal spores bearing a single furrow; Palaeontographica, Abt. B, v. 216, p.137-169.
K&J REMARKS
TYPE
ALL NAMES (Including synonyms) Spirotremesporites simplex
SERIAL NUMBER 1598
PUBLIC COMMENTS
 *For source, see Publication Reference.