Flabelloporina Sobreira, M. Caceres & Lucking 2018, gen. nov
Creators: name: Sobreira, Priscylla Nayara Bezerra
name: Cáceres, Marcela Eugenia Da Silva
name: Maia, Leonor Costa
name: Lücking, Robert
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Lecanoromycetes
Ostropales
Porinaceae
Flabelloporina

description: Flabelloporina Sobreira, M. Cáceres & Lücking gen. nov   
Mycobank: MB 826736  
 A genus in the family Porinaceae characterized by a thallus bearing flabelliform squamules, black, exposed perithecia not covered thallus, and transversely septate ascospores.   
 Type: — Flabelloporina squamulifera (Breuss, Lücking & E. Navarro) Sobreira, M. Cáceres & Lücking (holotype).   
 Etymology: —The name of the genus refers to the flabelliform squamules formed on the thallus.   
 Description: —Thallus corticolous, crustose, with shiny dark prothallus, bearing numerous, flabelliform squamules (Fig. 2A–B); photobiont Trentepohlia. Ascomata rare, developed on the crustose portions of the thallus, perithecioid, single, not covered by the thallus, hemispherical, black. Hamathecium composed of unbranched paraphyses. Asci unitunicate, 8-spored. Ascospores hyaline, transversely septate. Pycnidia not observed. Chemistry: perithecial wall K+ violet.   
 Discussion: — Porina squamulifera, introduced by Lücking et al. (2013), was included in Porina s.lat. because of the then unresolved taxonomy of the Porinaceae. Although the species demonstrates similarity with the genera Pseudosagedia and Trichothelium, due to the black perithecial wall reacting violet after treatment with KOH (Hafellner and Kalb 1995), molecular phylogeny clearly separates these genera from each other and from P. squamulifera. The new genus is otherwise distinguished from all other Porinaceae by the squamule-bearing thallus. Besides this unique morphology, thallus color in combination with a dark, shiny prothallus are reminescent of unrelated species in the P. eminentior (Nyl.) McCarthy (2000: 42) clade (Clathroporina) and the P. alba (R. Sant.) Lücking (2004: 412) clade (Phyllophiale), Trichothelium horridulum (Müll. Arg.) Santesson (1952: 222), and Zamenhofia. The latter features black perithecia and produce cylindrical isidia; it has not yet been sequenced, but its perithecial chemistry differs from that found in Flabelloporina and other lineages with black perithecia (Clauzade & Roux 1985; Tretiach 2014). The black, hemispherical perithecia, together with the 3-septate ascospores, are reminescent of several species of Porina s.lat., such as P. tetralocularis Aptroot in Aptroot & Sipman (1993: 39) and P. thaxteri Santesson (1952: 218). All these from crustose thalli and are likely unrelated to the new genus; we predict that they belong in the genera Pseudosagedia and Trichothelium, respectively.
description: Published as part of Sobreira, Priscylla Nayara Bezerra, Cáceres, Marcela Eugenia Da Silva, Maia, Leonor Costa & Lücking, Robert, 2018, Flabelloporina, a new genus in the Porinaceae (Ascomycota, Ostropales), with the first record of F. squamulifera from Brazil, pp. 67-75 in Phytotaxa 358 (1) on page 72, DOI: 10.11646/phytotaxa.358.1.4, http://zenodo.org/record/13705857