NAME Hypoxylonites pirozynskii
AGE Neogene.   AGE span: 23.03...2.588 mya
K&J CLASSIFICATION (2000) Fungi Imperfecti, Amerosporae.
FIGURE(S)
Image of
Pl.4fig.8.jpg
FIGURE 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.
SPECIES, AUTHORITY H. pirozynskii Elsik 1990a, p. 154, pl. 2, fig 67.
LOCATION The Gulf Coast.
ORIG DESCRIPTION* Aseptate, psilate, small fungal spores ca. 5-8 x 9-12 µm overall, mostly 5.5-6 x 11 µm. Outline in top view elliptical with rounded ends; in side view the outline is reniform, the straight to concave side bearing a longitudinal furrow which does not reach the apices. Spore wall ca. 0.5 µm.
COMMENTS* Hypoxylonites pirozynskii has a shorter furrow than Hypoxylonites pirozynskioides. The spores of H. elongatioides are about the same size as H. pirozynskii, but have thicker spore walls. Hypoxylonites pirozynskii is similar to extant Hypoxylon cohaerens Pers. ex Fr. var. microsporum Rogers & Candoussau 1980. The 5 µm spored type was found growing on Quercus; a larger spored Hypoxylon cohaerens is found on Fagus. Abundant in some Neogene strata, including forms that are very similar except the furrow is the full length of the spore and the margins can be folded along the furrow. This large group of spores of similar morphology undoubtedly contains several taxa that will require detailed morphologic study, including SEM.

[Under H. minutus, Elsik stated that the furrow in H. pirozynskii is on the more convex face.]

Derivation: Named in honor of Kris Pirozynski.
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.
K&J REMARKS
TYPE
ALL NAMES (Including synonyms) Hypoxylonites pirozynskii
SERIAL NUMBER 740
PUBLIC COMMENTS
 *For source, see Publication Reference.