Pezizaceae Dumort.
Creators: name: Sammut, Carmel
name: Alvarado, Pablo
name: Vooren, Nicolas Van
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Pezizomycetes
Pezizales
Pezizaceae

description: UPDATED KEY TO THE SPECIES OF MaRceLLeiNa BRUMM., KORF & RIFAI AND ALLIED GENERA
This key is based on the work of Moravec (1987) and applies to small discoid to pulvinate species, rather thick, showing violet, purple-brown, brown to black ascomata, and having globose ascospores containing at least one oil drop.
1. Ascus wall amyloid, sometimes weakly, best seen in the young asci .............................................................. 2
— Ascus wall always inamyloid ........................................................................................................................ 3
2. Ascomata brownish, dark brown to blackish, sometimes with olivaceous shades, without purplish tinges; ascospores 7-8.5(9) µm diam., ornamented with large, angular warts.............................................................. .............................. Scotopezia pseudoanthracina (Donadini) Van Vooren, Sammut & P. Alvarado, comb. nov.
— Ascomata black; ascospores 9.5-11.9 µm diam., smooth ................. Iodomarcelleina obscura gen. nov., sp. nov.
3. Ascospores ornamented, uniguttulate, but often accompanied by smaller droplets ...................................... 4
— Ascospores smooth, uniguttulate, rarely accompanied by smaller droplets ................................................... 8
4. Ascospore ornamentation forming a complete or incomplete irregular reticulum ........................................ 5
— Ascospore ornamentation made of isolated warts or curved irregular ribs which only rarely anastomose, appearing as ribs or spines in optical section; ascospores more than 8 µm diam. .................................................... 6
5. Ascospore reticulum mostly complete, only rarely incomplete, relatively low in optical section; 9-11 µm diam. ......................................................................... Marcelleina persoonii (P.Crouan & H.Crouan) Brumm.
— Ascospore reticulum mostly very incomplete, only very rarely complete, irregular, comparatively higher in optical section; 8-10.7 (11) µm diam. ......................................................................... M. rickii (Rehm) Graddon
6. Ascospore ornamentation made of large warts, ± rounded or tuberculate in optical section; ascospores 12-16 µm diam. ....................................................... M. tuberculispora K.Hansen & Sandal (synonym: M. mediterranea)
— Ascospore ornamentation made of smaller warts or ribs, rather low in optical section ................................. 7
7. Isolated warts and ribs 0.25-0.8(1.4) µm thick, 0.3-0.7(1) µm high; paraphyses enlarged above; ascospores (8)9-11 µm diam. ............................................................................................. M. georgii (Svrček) J.Moravec
— Isolated warts and ribs coarser, 0.5-1.5(2.2) µm thick, 0.5-1.5(1.7) µm high; paraphyses not or very slightly enlarged above; ascospores (8)9-11 µm diam. .................................................. M. brevicostatispora J.Moravec
8. Ascomata violet to dark violet; ascospores 10-12 µm diam. ........................................ M. benkertii J.Moravec
— Ascomata light to dark brown; ascospores 14-18 µm diam. ............... M. chopraiana (L.R.Batra) S.C.Kaushal
description: Published as part of Sammut, Carmel, Alvarado, Pablo & Vooren, Nicolas Van, 2023, Emendation of Marcelleina Brumm., Korf & Rifai (Ascomycota, Pezizales) and proposal of Iodomarcelleina obscura gen. nov., sp. nov. and Scotopezia pseudoanthracina gen. nov., comb. nov. for the lineages outside it, pp. 159-170 in Cryptogamie, Mycologie 44 (12) on page 169, DOI: 10.5252/cryptogamie-mycologie2023v44a12, http://zenodo.org/record/10454545