Heptameria elegans
Heptameria elegans Rehm & Thüm., in Thümen, Inst. Rev. Cient. Litt., Coimbra 27: no. 292 (1879).
Index Fungorum number: IF 228370; Facesoffungi number: FoF 12231, Fig. 1
Description:
Saprobic on host. Sexual morph: Unknown. Asexual morph: Conidiomata 500–800 μm diam., 300–450 μm high, pycnidial, dark colored, opening irregularly. Conidiomata wall not observed. Conidiophores 35−48 × 1.5−2.5 µm (x̄ = 45.2 × 2.0 µm, n = 20), reduced to conidiogenous cells. Conidiogenous cells phialidic, hyaline to olivaceous brown. Conidia 3.5−4.3 × 2.0−2.9 µm (x̄ = 3.7 × 2.3 µm, n = 20), simple, dark brown, aseptate, with thin and indistinctly ornamented outer wall.
Material examined: Portugal, on unidentified host, 1 January 1879, von Thümen (UME 30516).
Fig. 1 Heptameria elegans (UME 30516). a, b Details of herbarium material. c Squash mount of conidioma. d Conidiophores. e, f Conidia. Scale bars: c = 200 μm, d–f = 20 μm.
Importance and distribution
Heptameria comprises three species Heptameria chilensis, H. elegans and H. foliicola. Most species of Heptameria have been synonymized and transferred to other genera such as Alternaria, Amarenomyces, Aquimassariosphaeria, Buergenerula, Byssothecium, Clypeosphaeria, Cucurbitaria, Davidiella, Didymocyrtis, Dothiora, Entodesmium, Ephelina, Halobyssothecium, Kalmusia, Lasiosphaeriopsis, Lepteutypa, Leptopeltis, Leptosillia, Leptosphaeria, Lophiostoma, Massariosphaeria, Melanomma, Metasphaeria, Montagnula, Mycosphaerella, Nakataea, Nemania, Neocamarosporium, Nodulosphaeria, Ophiobolus, Paraleptosphaeria, Paramassariosphaeria, Passeriniella, Phaeosphaeria, Phaeosphaeriopsis, Plenodomus, Pleospora, Pyrenidium, Pyrenophora, Rebentischia, Septoriella, Setoseptoria, Sporormiella, Trematosphaeria, Typhicola and Wettsteinina. Heptameria is a doubtful genus. An attempt to re-collect and sequence the three species is needed to verify the validity of Heptameria.
References
Kirk PM, Stalpers JA, Braun U, Crous PW et al. 2013 – A without-prejudice list of generic names of fungi for protection under the International Code of Nomenclature for algae, fungi, and plants. IMA fungus 4, 381–443.
Lucas M, Sutton B. 1971 – Heptameria Rehm & Thüm. Transactions of the British Mycological Society 57, 283–288.
Lumbsch HT, Huhndorf SM. 2010 – Outline of Ascomycota 2009. Myconet 14, 1–64.
Petrak F. 1951– Uber die Gattung Heptameria Rehm & Thuemen. Sydowia 5, 423–425.
Wijayawardene NN, Hyde KD, Dai DQ, Sánchez-García M et al. 2020 – Outline of Fungi and fungus-like taxa – 2021. Mycosphere 13, 53–453.
Wijayawardene NN, Hyde KD, Rajeshkumar KC, Hawksworth DL et al. 2017– Notes for genera: Ascomycota. Fungal Diversity 86, 1–594.
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