PART 1

Pyrenula mastoidea Ach., Ges. Naturf. Berlin Mag. Neusten Entdeck. Gesammten Naturk. 6:16.
1814. Porina mastoidea (Ach.) Müll. Arg., Bot. Jahrb. Syst. 6: 399. 1885. Type. PHILIPPINES.
Manila (UPS, lectotype, Malme, 1929, not seen; isolectotype, H-Ach 830-A).
Although reported from North America, all the material which I have examined has ascospores smaller
than those of the type of C. mastoidea. The epithet mastoidea has been widely misapplied in North America,
usually to taxa in the Porina nucula group.
Clathroporina subpungens (Malme) R. C. Harris, comb. nov.
Porina subpungens Malme, Ark. Bot. 23A(1): 17. 1929. Type. PARAGUAY. Colonia Risso, Guarda
Francia, 16 Oct 1893, Malme, Regn. Lich. 1927 (S, lectotype, Mccarthy, 1993).
McCarthy (1993) placed this name in synonymy with Porina mastoidea (Ach.) Müll. Arg., that has larger
ascospores (50-62 × 8-9(-10.5) µm in lectotype). On a global scale McCarthy may well be correct but since
the lectotype of P. mastoidea is Asian and all the North American material has smaller ascospores, and
because a name for a taxon so defined is available, I have chosen to take up Malme's name pending a careful
statistical study of ascospore variation or perhaps molecular study. Although this species and the next were
included in my thesis, this is the first published record of their occurrence in North America.
New to North America. FLORIDA. Dade County: Royal Palm State Park, 6 Dec 1919, Britton & Britton 763
(FH, NY), hammock, E end of Long [Pine] Key, Everglades, Small 8397 (NY); Seminole County: Sanford, on
oak, Feb 1919, Rapp 746 (MICH).
Clathroporina tetracerae (Ach.) R. C. Harris, comb. nov.
Verrucaria tetracerae Ach., Methodus 121. 1803. Porina tetracerae (Ach.) Müll. Arg., Bot. Jahrb.
Syst. 6: 401. 1885. Type. GUINEA. (H-Ach 838-C, lectotype, selected here).
McCarthy (1993) cited H-Ach 838 as the holotype. It is mixed: 838-A is a Pyrenula. 838-B is internally
identical to 838-C but has ascomata ca. 2× as large. This refinement of the lectotypification is purely
precautionary and has no effect on the circumscription at this time. Material at S also contains a mixture
pieces with large and small ascomata.
Clathroporina tetracerae seems to have been more common in the past than it is now. It will be
interesting to see if this is lack of collecting or loss of habitat as Clathroporina, with its preference for rain
forests, is likely to be the most ecologically sensitive member of the Trichotheliaceae.
New to North America. FLORIDA. Collier County: Fakahatchee Strand State Preserve, Royal Palm
Hammock, 6 Dec 1992, Harris 29932 (NY); Dade County: Cocoanut Grove, 1898, Thaxter 277 (FH), 287
(MICH), Deering Hammock, Cutler, 29 Apr 1918, Small 8352 (NY), Hattie Bauer Hammock, Small & Mosier
5954 (NY), Royal Palm Hammock State Park, 6 Dec 1919, Britton & Britton 757 (NY), Snapper Hammock, 11
Dec 1919, Britton & Britton 800 (FH, NY); Monroe County: Key Largo, Apr 1921, Kelly (MICH).
PORINA Müll. Arg., nom. cons.
1. Thallus and ascomatal warts not isidiate .................................................................................................. 2
2. Ascospores transversely septate .......................................................................................................... 3
3. Growing on bark ................................................................................................................................ 4
4. Ascospores fusiform to fusiform-cyllindrical, 7(-9)-septate ........................................................... 5
5. Ascospores larger, over 40 × 8 µm ........................................................................................... 6
6. Ascospores less than 60 µm long ......................................................................................... 7
7. Ascospores broad, with rounded ends, 40-52 × 11-14 µm,
8-celled; Dade and Lee? counties.............................................................. P. nucula Ach.
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