Fungalpedia – Note 2967, Neonectria
Neonectria Wollenw.
Citation when using this data: Zhang JF et al. 2023 – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification:
Neonectria was introduced by Wollenweber (1917) with N. ramulariae as the type species. Members of this genus usually occur in tropical and temperate regions, and some species are reported as plant pathogens causing cankers, root rots, and other diseases on hardwood and coniferous trees (Samuels and Brayford 1994; Rossman et al. 1999; Hirooka et al. 2005; Kobayashi et al. 2005; Castlebury et al. 2006; Halleen et al. 2006; Chaverri et al. 2011). Because of morphological variation, Neonectria has been subdivided into five informal groups (Booth 1959; Brayford and Samuels 1993; Samuels and Brayford 1994), which were later recognized as five independent genera, based on morphological features and multi-gene analysis (Chaverri 2011). In the latest outline of fungi, 30 species were included in Neonectria (Wijayawardene et al. 2022a), however, these numbers are underestimated because several species of Nectria-like fungi with Cylindrocarpon anamorphs have not been transferred to Neonectria (Chaverri 2011), and a systematic revision is need.
Type species: Neonectria ditissima (Tul. & C. Tul.) Samuels & Rossman, CBS Biodiversity Series 4: 134 (2006).
Other accepted species: Species Fungorum – search Neonectria.
Figure 1 – Neonectria ditissima (GZAAS 19-1749) a Appearance of ascomata on the substrate. b, c Vertical section through ascomata. d Section of peridium. e Paraphyses. f–h Asci. i–n Ascospores. Scale bars: b = 200 µm, c = 50 µm, d, e = 10 µm, f–h = 20 µm, i–n = 5 µm.
References
Booth C. 1959 – Studies of pyrenomycetes. IV. Nectria (part 1). Mycological Papers 73:1–115.
Castlebury LA, Rossman AY, Hyten AS. 2006 – Phylogenetic relationships of Neonectria/Cylindrocarpon on Fagus in north America. Botany 84:1417–1433.
Halleen F, Schroers H-J, Groenewald JZ, Rego C et al. 2006 – Neonectria liriodendri sp. nov., the main causal agent of black foot disease of grapevines. Stud Mycol 55:227–234.
Hirooka Y, Kobayashi T, Natsuaki KT. 2005 – Neonectria castaneicola and Neo. rugulosa in Japan. Mycologia 97:1058–1066.
Kobayashi T, Hirooka Y, Natsuaki KT, Kawashima Y, Ushiyama K. 2005 – New canker diseases of Abies veitchii and Acer crataegifolium caused by Neonectria castaneicola. J Gen Plant Pathol 71:124–126.
Rossman AY, Samuels GJ, Rogerson CT, Lowen R. 1999 – Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes). Stud Mycol 42:1–248.
Samuels GJ, Brayford D. 1994 – Species of Nectria (sensu lato). with red perithecia and striate ascospores. Sydowia 46:75–161.
Wollenweber HW. 1917 – Fusaria autographice delineata. Ann Mycol 15:1–56.
Entry by
Jinfeng Zhang, Guizhou Provincial Institute of Tea, Guiyang 550006, People’s Republic of China, Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, People’s Republic of China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.
Published online 18 August 2026