Comun. Bot. Mus. Nac. Hist. Nat. Antropol., Montevideo 6(no. 123): 2 (2002).

Protolog: Similis Parmotremopsis phlyctina, sed lobis sublineare elongatis et acidum salazinum continenti differt.

Protolog type data: Type: Uruguay: Rocha, Castillos, Cerro Lechiguana (9 km N from Castillos City: 34°12'S-53°50'W) alt. ca. 100 m, on bark, G. Geymonat s.n. (Herb. Osorio 9459). Holotype in Herb. Osorio, isotype in TNS.

Type locality: Uruguay, Rocha, Castillos, Cerro Lechiguana 9 km north from Castillos City, on bark, ca. 100 m, date unknown, G. Geymonat s.n., Herb. Osorio 9459 (Osorio - holotype; TNS - isotype).

Type locality coordinates: 34°12'S, 53°50'W.

Molecular barcode: Data lacking.

Thallus: mineral gray, loosely adnate and divaricate, 5-6.5 cm broad, lobes elongate, sublinear, truncate at the apices, usually imbricate, 2-7 mm wide, cilia simple, mostly axillary, 0.2-0.8 mm long, upper surface plane, continuous, emaculate, lacking soredia and isidia, lower surface black, moderately to densely rhizinate, the rhizines simple but very rarely furcate, 0.5-1.2 mm long. Thallus 130-160 µm thick, upper cortex 13-18 µm thick, gonidial layer subcontinuous, 26-39 µm thick, medulla 60-85 µm thick, lower cortex dark brown, about 15 µm thick. Apothecia unknown (Kurokawa & Osorio 2002: 2).

Photobiont: Green alga, probably Trebouxia.

Chemistry: Atranorin, chloroatranorin, salazinic acid, consalazinic acid (minor) (Kurokawa & Osorio 2002: 2).

Ecology: On bark.

Distribution type: Known only from the type locality.

Taxonomy: The present new species is related to P. phlyctina (Hale) Elix & Hale, which is known from Mexico, Jamaica, Dominican Republic and Puerto Rico (Hale 1976: 40). However, it is clearly distinguished from the latter by the sublinear elongate lobes with truncate apices and the production of salazinic acid rather than norstictic acid. In addition, cilia of the present species are moderate and simple, whereas they are very sparse and sometimes dichotomously branches in P. phlyctina. Because of the sublinear elongate lobes with truncate apices, the present species might be considered to belong to Hypotrachyna, which is characterized by having dichotomous rhizines and the lack of cilia. In fact, it may be easily confused with Hypotrachyna gigas (Kurok.) Hale in having sublinear lobes with truncate apices. However, simple rhizines and sparse cilia indicates that this species should be classified under Parmotremopsis. On the other hand, the present new species resembles Parmeliella simplicior (Hale) Elix & Hale, an Indian species, which also produces salazinic acid in the medulla. However, the new species forms sublinear lobes with truncate apices, while lobes are subirregular and rotund at the apices in P. simplicior (Kurokawa & Osorio 2002: 3).

Note:

Distribution Database: Distributions

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank