NAME Pesavis tagluensis
AGE Paleocene-Eocene.   AGE span: 65.5...33.9 mya
K&J CLASSIFICATION (2000) Ascomycetes?, Sphaeriales?
FIGURE(S)
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FIGURE REFERENCE Elsik WC, Jansonius J. 1974. New genera of Paleogene fungal spores; Canadian Journal of Botany, v. 52, p. 953-958.
SPECIES, AUTHORITY P. tagluensis Elsik & Jansonius 1974, p. 956, pl. 1, fig. 5.
LOCATION Common in the region of and including Washington state, British Columbia, Alaska, and the Mackenzie delta, N.W.T. (Canada and USA.)
ORIG DESCRIPTION* Pluricellular fungal sporelike body; from a central cell with a short stalk two lateral crescentic branches of five or six (rarely up to eight) cells curve around, their tips meeting or briefly overlapping, enclosing a circular area; from each of the primary cells of the two crescentic branches and the stalked central cell two (rarely one), usually thinner-walled hyphae-like projections, each of some two to four cells, stretch toward the center of the enclosed area; often a dark, thickened membrane separates the primary cell from the secondary hypha. The flat end of the central stalk usually has a circular peripheral thickening, indicating that at one time it was attached to another structure. Dimensions of holotype about 32 x 38 μm; each lateral arm with five cells; secondary hyphae only slightly thinner-walled, two- or three-celled, about 4 μm wide at proximal end, in pairs immediately straddling the inner median line.
COMMENTS* Occasionally small specimens without secondary “hyphae” are found; these are at present interpreted as immature or juvenile stages.
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 Small specimens without, or with short, secondary hyphae were interpreted as earlier stages in the course of evolution, and differentiated as a separate species, Pesavis parvus, by Kalgutkar & Sweet (1988).
TYPE
ALL NAMES (Including synonyms) Pesavis tagluensis
SERIAL NUMBER 1300
PUBLIC COMMENTS
 *For source, see Publication Reference.