Rasutoria abietis
Rasutoria abietis (Dearn.) M.E. Barr, Mycotaxon 29: 502 (1987).
≡ Dimerosporium abietis Dearn., Mycologia 18(5): 243 (1926).
Index Fungorum number: IF 130498; Facesoffungi number: FoF 11058, Fig. 1, 2
Description: see Dearness (1926); Videira et al. (2017).
Notes: The specimen we observed was in poor condition and we could not see any morphological characters.
Material examined: Canada, British Columbia, Cinema, on Abies lasiocarpa (Pinaceae), 23 July 1949, W.G. Ziller (UBC F3146).
Fig. 1 Rasutoria abietis (UBC F3146). a–c Herbarium material and appearance of ascomata on the host surface. d Squash mount of ascomata. Scale bar: d = 50 μm.
Fig. 2 Asci and ascospores of Dimerosporium abietis (re-drawn from Figs. 12, 15 in Farr 1963). a, b from holotype. c, d from paratype (Boyce 1263). × 625.
Importance and distribution
Species of Rasutoria are associated with needles of Abies amabilis. They can cause disease of the host plants and act by means of toxic secretions or enzymes, which harm plant tissue, and then utilize these tissues as a source of nutrition (Goralska and Blaszkowska 2015). Although four Rasutoria epithets are listed in Index Fungorum (2022), two species R. pseudotsugae and R. tsugae have been synonymized and transferred to Zasmidium. Rasutoria is known from three host plants and one plant family namely Abies amabilis, A. concolor and Pseudotsuga menziesii (Pinaceae). Rasutoria seems to be host specific. The genus has been reported from the United States (California and Washington). Rasutoria abietis and R. terrieri need to be recollected in order to decide their correct phylogenetic
References
Dearness J. 1926 – New and Noteworthy Fungi – IV. Mycologia 18, 236–255.
Farr ML. 1963 –The systematic position of some Dimeriella species and associated fungi on Pinaceae. Mycologia 55, 226–246.
Góralska K, Błaszkowska J. 2015 – Parasites and fungi as risk factors for human and animal health. Annals of parasitology 61, 207–220.
Videira SIR, Groenewald JZ, Nakashima C, Braun U et al. 2017 – Mycosphaerellaceae–Chaos or clarity? Studies in Mycology 87, 257–421.
Wijayawardene NN, Hyde KD, Lumbsch HT, Liu JK, Maharachchikumbura SSN, Ekanayaka AH, Tian Q, Phookamsak R. 2018 – Outline of Ascomycota: 2017. Fungal Diversity 88, 167–263.
Wijayawardene NN, Hyde KD, Rajeshkumar KC, Hawksworth DL et al. 2017 – Notes for genera: Ascomycota. Fungal Diversity 86, 1–594.
Winton LM, Stone JK, Hansen EM, Shoemaker RA. 2007 – The systematic position of Phaeocryptopus gaeumannii. Mycologia 99, 240–252.
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