PRINTZINA GEN. NOV. (TRENTEPOHLIACEAE), INCLUDING A DESCRIPTION OF A NEW SPECIES¹

Abstract

Examination of Trentepohlia Martius species indicated significant morphological diversity within the genus. This diversity forms the basis for the description of a new genus, Printzina Thompson and Wujek. The generic taxonomy is based on the nature of its superficial growth on leaves or twigs and a papilla pore basal on the sporangium, adjacent to the area of attachment. Certain nomen‐clatural treatments were required: the transfer of nine species from Trentepohlia and the description of one new species, Printzina ampla.

Plant-Parasitic Algae (Chlorophyta: Trentepohliales) in American Samoa

“…The Trentepohliales currently comprises six genera (Thompson and Wujek 1997). Cephaleuros grows beneath the host's cuticle and is considered an obligate epiphyte and occasional parasite by some (Thompson and Wujek 1997) and a plant pathogen by others (Cunningham 1879, Marlatt and Alfieri 1981, Holcomb 1986, Holcomb et al 1998.…”

“…Cephaleuros grows beneath the host's cuticle and is considered an obligate epiphyte and occasional parasite by some (Thompson and Wujek 1997) and a plant pathogen by others (Cunningham 1879, Marlatt and Alfieri 1981, Holcomb 1986, Holcomb et al 1998. Stomatochroon Palm, 1934, lives in the substomatal chambers of its host and was described as an "obligate endophyte (parasite)" by Chapman and Good (1983) and a commensal organism by Timpano and Pearlmutter (1983).…”

“…Stomatochroon Palm, 1934, lives in the substomatal chambers of its host and was described as an "obligate endophyte (parasite)" by Chapman and Good (1983) and a commensal organism by Timpano and Pearlmutter (1983). Phycopeltis Millardet, 1870, andPhysolinum Printz, 1921, are supracuticular epiphytes but may be found on other surfaces under very humid or moist conditions (Thompson and Wujek 1992, Davis and Rands 1993, Rindi and Guiry 2002. The free-living algae Trentepohlia Martius, 1817, and Printzina Thompson & Wujek, 1992, occur widely on living and nonliving substrates (Chapman 1984, Rindi and Guiry 2002, Thompson and Wujek 1992.…”

“…First, these algae are found mainly in tropical and subtropical climates (Chapman andGood 1983, Thompson andWujek 1992). Second, though they have a broad host range, their damage is often minimal and the presence of a few small thalli on leaves or stems may go unnoticed Rijkenberg 1971, Holcomb 1986).…”

“…Finally, algae in this order are sometimes mistaken for fungi due to their filamentous nature and formation of setae, sporangiophores, and zoospores (Cunningham 1879, Singh 1962, Wellman 1965, Chapman 1984, Holcomb and Henk 1984, Reynolds and Dunn 1984. Misidentification is enhanced when fungi invade these algae, forming lichens such as Strigula and Raciborskiella (Santesson 1952, Joubert and Rijkenberg 1971, Chapman and Good 1983, Thompson and Wujek 1997.…”