NAME Brachysporisporites opimus
AGE (Elsik & Jansonius) Paleogene; (Norris): Eocene.   AGE span: 65.5...23.03 mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Phragmosporae.
FIGURE(S)
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Pl.9fig.21.jpg
FIGURE REFERENCE Elsik WC, Jansonius J. 1974. New genera of Paleogene fungal spores; Canadian Journal of Botany, v. 52, p. 953-958.
SPECIES, AUTHORITY B. opimus (Elsik & Jansonius) Norris 1986, p. 24.
LOCATION (Elsik & Jansonius, Norris) Mackenzie Delta Region, District of Mackenzie, N.W.T., Canada.
ORIG DESCRIPTION* Spores four- or five-celled; two basal cells darker, thicker-walled than others; overall shape ovoid, with one or two appended terminal cells; pore may be covered or enclosed by a minute, thin-walled "porecell"; septa distinct, thick, perforate; basal outline in holotype slightly uneven as a result of a torn spore wall; wall psilate. Size of holotype about 34 x 22 µm.
COMMENTS* Differs from Brachysporisporites cotalis in lack of concavity of outline in upper part of spore; also, in larger size and wider shape. The intraspecific variability among Recent fungal spores is not adequately known; however, fungal spores from one fruiting body apparently are at least somewhat variable in number of cells and overall size.

Derivation of name: from Latin opimus, fat.
PUBLICATION REFERENCE Elsik WC, Jansonius J. 1974. New genera of Paleogene fungal spores; Canadian Journal of Botany, v. 52, p. 953-958.
K&J REMARKS
TYPE
ALL NAMES (Including synonyms) Granatisporites opimus Elsik & Jansonius 1974, p. 954, pl. 1, fig. 14.; Brachysporisporites opimus
SERIAL NUMBER 131
PUBLIC COMMENTS
 *For source, see Publication Reference.