NAME Monoporisporites
AGE    AGE span:  mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Amerosporae.
FIGURE(S)
FIGURE REFERENCE
SPECIES, AUTHORITY Monoporisporites van der Hammen 1954, no. 1, p. 83, 103; no. 2, p. 14; emend.
LOCATION
ORIG DESCRIPTION* ORIGINAL DIAGNOSIS: (van der Hammen 1954): [Fungal] spore with one small, [round (van der Hammen, 1955)] pore. [Jansonius & Hills (1976), card no. 1704.]

EMENDED DIAGNOSES (Elsik 1968, p. 272): Monoporate, nonseptate, psilate fungal or algal spores. Shape spherical to subspherical.

(Sheffy & Dilcher 1971, p. 40): Monoporate, aseptate, psilate to finely punctate fungal or algal spores. Shapes spherical to subspherical, hilate or monoporate.

(Kalgutkar & Jansonius 2000): Monohilate (or monoporate), unicellate, generally small to medium-sized, round, oval or elongate elliptical fungal spores. Wall generally smooth, but ornamented forms are included.
COMMENTS* (Sheffy & Dilcher): The present emendment combines two previously emended descriptions; Clarke (1965) defined the sculpture as psilate to finely punctate and added the word hilate, for he considered the "pore" to be either a hilum or a pore. Elsik (1968) applied the genus to both fungal and algal spores. The description is now expanded to include the punctate species Monoporisporites globosus Clarke, M. buerglii van der Hammen, and M. minutus van der Hammen, the type species.
PUBLICATION REFERENCE Van Der Hammen T. 1954. El desarrollo de la flora Colombiana en los periodos geológicos. I. Maestrichtiano hasta Terciario más inferior; Boletín Geológico, v. 2, p. 49-106.

Jansonius J, Hills LV. 1976. Genera file of fossil spores; Special Publication, Department of Geology, University of Calgary, cards 1-3287 cds.

Elsik WC. 1968. Palynology of a Paleocene Rockdale lignite, Milam County, Texas. I. Morphology and taxonomy; Pollen et Spores, v. 10, p. 263-314.

Sheffy MV, Dilcher DL. 1971. Morphology and taxonomy of fungal spores; Palaeontographica, Abt. B, v. 133 p. 34-51.
K&J REMARKS Clarke (1965) gave the following restated diagnosis: "Fungal spores unicellular (amerosporous), spherical to subspherical, hilate or monoporate, cell wall psilate to finely punctate." He did not formally propose this phrasing as an emendation.

In dispersed spherical unicellular spores, the orientation of a proximal (hilate) pole, and the opposite distal pole, is difficult to interpret. Well developed "pores" may in reality represent a hilum, which is assumed to be the proximal point of the spore. However, this can not always be determined with certainty. Also, fungal spores may show more than one pore, as germinal (or solution) pores can develop at any point of the spore wall. This distinction must be made when the significance of a pore is evaluated. The coincidence of a flat spot at the pore location may help to identify a true hilum, where the spore originally was attached to the conidiophore or hypha. In elongated spores, it is assumed that, generally, the proximal pole coincides with one of the terminals of the long axis. Pore-like structures are also common in spores arranged in a catenate manner.

Kalgutkar and Jansonius (2000) include spherical and elongate spores in the genus, because both shapes may be produced by the same genus or species of modern fungi. Also see REMARKS under Lacrimasporonites.
TYPE TYPE: Monoporisporites minutus van der Hammen 1954, p. 103, pl. 20; type species designated by van der Hammen 1955, p. 14;type specimen pl. 20, left, top row of figures (as Monoporisporites minutus A), lectotype designated by Jansonius & Hills 1976, card 1704. Not Monoporisporites buerglii van der Hammen 1954, p. 103, pl. 20 (middle, top row of figures), which is neotype (not 'lectotype') designated by Potonié 1960, p. 112.
ALL NAMES (Including synonyms) Ornatisporites Parsons & Norris 1999.
Polyporisporites van der Hammen 1954.
Psiammopomopiospora Salard-Cheboldaeff & Locquin 1980.
Psiamspora Salard-Cheboldaeff & Locquin 1980.
Reticulatisporonites Elsik 1968. ; Monoporisporites;
SERIAL NUMBER 960
PUBLIC COMMENTS
 *For source, see Publication Reference.