NAME Spirotremesporites duenasii
AGE Pleistocene.   AGE span: 2.588...0.0117 mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Amerosporae.
FIGURE(S)
Image of
Pl.4fig.45.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. duenasii Elsik 1990a, p. 162.
LOCATION Colombia.
ORIG DESCRIPTION* Aseptate, psilate fungal spores with an elliptical outline; the outline is reniform in side view. The furrow is spiral around the axis of the spore, traversing the flat to slightly concave surface of the spore. Overall size is ca. 9-10 x 20-22 µm. The spore wall is ca. 1 µm thick.
COMMENTS* Spirotremesporites duenasii has a relatively thick spore wall for its size. Spirotremesporites shahejiensis has more bluntly rounded ends and is larger.

This morphotype is distinctly elliptical and reniform in outline, compared to the elongate fusiform outline of the type of S. simplex Dueñas-Jimenez 1979, emend. Elsik. Accordingly it is raised to species rank.

Derivation: Named in honor of Hernando Dueñas-Jimenez.
PUBLICATION REFERENCE 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.

Dueñas-Jimenez H. 1979. Estudio palinologico de los 35 mts. superiores de la seccion Tarragona, Sabana de Bogata; Caldasia, v. 12, p. 539-571.
K&J REMARKS
TYPE
ALL NAMES (Including synonyms) Spirotremesporites simplex Dueñas-Jimenez (pro parte), pl. 3, fig. 4.; Spirotremesporites duenasii
SERIAL NUMBER 1590
PUBLIC COMMENTS
 *For source, see Publication Reference.