PART 1

Distopyrenis pachyospora Aptroot
Aptroot described the ostiole as apical but my drawings from the type show it as strongly eccentric as it is
in the other material cited here. Buck 4791 and Harris 15854 cited by Aptroot as D. fuliginosa are D.
pachyospora.
New to North America. TEXAS. Bastrop County: Bastrop State Park, just E of Bastrop, on Quercus, 19
Mar 1976, Egan EL-8193 (MIN, NY); Robertson County: Boy Scouts of America Camp Arrowmoon, 6 mi E of
Hearne off FM 2549, on Quercus, 10 Apr 1976, Egan EL-8355 (MIN).
Distopyrenis quercicola R. C. Harris, sp. nov.
Ostiolis excentris et ascosporis ovalibus sat grandis, 16-19 × 9-10.5 µm.
Type. MISSISSIPPI. Smith County: Bienville National Forest, Marathon Lake Recreation Area, oak-pine woods
on W shore of lake, on white oak, 30 Sep 1992, Harris 28782 (NY, holotype).
Thallus indicated by whitening of bark. Ascomata mostly immersed, ± oval to pear-shaped, ca. 0.3 × 0.4-
0.5 mm. Ostiole eccentric with a well developed gelatinous periphysoid plug. Asci obclavate, with no or poorly
developed ocular chamber, with irregularly arranged ascospores. Ascospores oval with large rounded to
obovoid lumina, euseptum not evident, 16-19 × 9-10.5 µm. Microconidia rod-shaped, 8-9 × 1 µm.
Distopyrenis quercicola is similar to D. pachyspora in ascoma morphology but differs in the larger
ascospores with larger lumina. It is known only from the type collection.
Distopyrenis submuriformis R. C. Harris, sp. nov.
Species unica ascosporis submuriformibus, 3 × 1-2 septatis, 13-17 × 7-9 µm et ascomatis similibus
Pyrenographae.
Type. FLORIDA. Monroe County: Everglades National Park, road W of West Lake through mangrove swamp
and hammock to ocean, on old wood, 14 May 1967, Harris 2848-D (NY, holotype).
Thallus indicated by pinkish white discoloration of wood. Ascomata oval to long oval, elongated with
grain of wood, strongly melanized, sessile or on a small pedestal of wood (due to erosion of wood away from
ascomata?), 1.2 × 0.7-1.0 mm. Ostiole central and apical. Asci cylindrical with uniseriate ascospores.
Ascospores ellipsoidal, submuriform, 3 × 1-2 septate, 13-17 × 7-9 µm. Microconidia not found.
This is a troubling species. The submuriform ascospores and Pyrenographa-like ascomata suggest
placement in Pyrenographa. However, the ascospores have better developed endospore and a "Rinodinalike"
2-celled stage in development unlike Pyrenographa where the young ascospores are relatively thin walled
and do not form a strongly thickened endospore. Therefore, the species is provisionally assigned to
Distopyrenis. The collection was made in 1967 providing some insight into how long it takes for systematic
knowledge to accumulate to a point where some specimens can even be provisionally assigned to a family
and genus.
Distopyrenis sp. Buck 9033
This is a rather poor collection and I am unable to determine ostiole orientation. The ascospores have a
dark ring at the margin of the septum unlike D. composita where it is central. Its formal description awaits
more adequate material as do two other neotropical species noted in the key.
GRANULOPYRENIS Aptroot
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