PART 1
PART 1
PART 1
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Verrucaria subantecellens Nyl., Flora 59: 364. 1876, nom. nud. Arthopyrenia subantecellens<br />
Müll. Arg., Bot. Jahrb. Syst. 6: 403. 1885. Type. CUBA. Wright, Verr. Cub. 2 (MSC, holotype<br />
fragment; H-Nyl 769, isotype).<br />
Arthopyrenia griseola Müll. Arg., Rev. Mycol. (Toulouse) 10: 182. 1888. Type. PARAGUAY.<br />
Paraguarí, Balansa (G, holotype).<br />
Presumably on the basis of the ascospores that soon become 4-celled, brownish and granular<br />
ornamented, Riedl removed this species from Arthopyrenia to Mycoporopsis even though the ascomata are<br />
uniloculate. Placement in Mycoporum ( incl. Mycoporopsis sensu Riedl) is further supported by the large<br />
ascospores, large asci, thick walled in the upper part and the characters of the hamathecium. Purvis et al.<br />
(1992) spelled the epithet "antecellans". All the specimens in Nylander's herbarium have the "-ens" spelling<br />
and my small Latin dictionary gives "antecello, -ere" the participle of which should end in "-ens". The British are<br />
noted scholars of Latin and perhaps there is some linguistic point I have missed. However, until I am<br />
corrected, I will spell the epithet "antecellens".<br />
Mycoporum buckii R. C. Harris, sp. nov.<br />
Similis M. sparselli sed ascomatis planioribus, strato brunneo sub hymeniis, ascosporis minoribus, 9.5-12<br />
× 2.5-3 µm et macroconidiis oblongiis, ca. 5 × 2 µm.<br />
Type. FLORIDA. Duval County: Flood plain forest E of San Pablo River (Intracoastal Waterway), W of 17th St.<br />
N., dead portion of trunk of oak, 19 Jun 1975, Buck B175 (NY, holotype; MICH, isotype? not seen).<br />
Thallus a whitish blotch on substrate. Ascomata black, superficial, compound, multiostiolate, with many<br />
chambers, orbicular to elliptical (elongated with the grain of the wood), 0.5-1.0 mm diam, or to ca. 0.5 × 1.0<br />
mm, with a brown basal layer. Asci obclavate to ± fusiform, 40-55 × 10-14 µm, with ascospores weakly<br />
biseriately to irregularly arranged. Ascospores fusiform, colorless, 2-celled, 10-13 × 3-3.5 µm. Microconidia<br />
not found. Pycnidia with macroconidia, oblong, colorless, ca. 5 × 2 µm.<br />
Mycoporum buckii is anomalous in several ways, the narrow asci which are not basally swollen, the well<br />
developed brown layer at the base of the ascoma and the presence of what can be interpreted as<br />
macroconidia. However, I would not feel comfortable creating a new genus and believe it is best<br />
accommodated in Mycoporum pending more thorough investigation. It is easily recognized by the small<br />
ascospores. Some species of Strigula have ascospores this small but have small, uniloculate ascomata. In<br />
addition to the cited collections it has been collected in Belize by Mason Hale.<br />
Additional specimens. FLORIDA. Collier County: Fakahatchee Strand State Preserve, 1.2 mi from N<br />
entrance on W. J. James Memorial Scenic Drive, open Taxodium swamp, on trunk of Taxodium, 6 Dec 1992,<br />
Buck 22817 (NY). DOMINICAN REPUBLIC. Prov. Monte Cristi: SE of El Morro de Monte Cristi, ca. 20 m, low dry<br />
forest near sea, 9 Jan 1987, Harris 19603 (JBSD, NY).<br />
Mycoporum californicum (Zahlbr.) R. C. Harris, comb. nov.<br />
Mycoporellum californicum Zahlbr., Ann. Mycol. 10: 363. 1912. Mycoporopsis californica (Zahlbr.)<br />
Riedl, Sydowia 16: 216. 1962[1963]. Tomasellia californica (Zahlbr.) R. C. Harris in Tucker &<br />
Jordan, Wasmann J. Biol. 36: 87. 1979, comb. inval. (33.2). Type. CALIFORNIA. Santa Monica<br />
Mtns., Hasse 1003 (FH, isotype).<br />
This species is separated from M. eschweileri, that has similar sized ascospores, by the early<br />
development of 4-celled ascospores, and from Tomasellia americana by larger ascospores and hamathecium<br />
obscured by oil droplets. Its distribution is mainly western. The easternmost record previously was from<br />
Texas. However, a number of ± western species are turning up in northern Florida.<br />
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