Observation 189415: Daldinia Ces. & De Not.

When: 2014-11-24

Collection location: Scientia 627-Jr, Pretoria, Gauteng, South Africa [Click for map]

Who: Glen van Niekerk (primordius)

No specimen available



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D. concentrica in southern Africa? Hmmmm…
By: Roo Vandegrift (Werdnus)
2014-11-24 18:12:19 CST (-0500)

I think D. concentrica is pretty much exclusively European at this point. There are many other species (though generally a restricted list) for those that occur in South Africa, but in all cases you’ll need to make a slide of the perithecial contents and measure the ascospores to distinguish taxa. Consider Daldinia dennisii var. microspora, D. eschscholtzii (probably the most common tropical/subtropical Daldinia), D. caldariorum, and D. placentiformis, which is also pan-tropical.

Here’s an excerpt from the notes about D. concentrica from the new (2014) Stadler et al. monograph of Daldinia: "Known distribution/host preference of [D. concentrica] stromata: Western, central and southern Europe, reaching Denmark in the north; apparently rare in regions with predominantly continental climates, stromata most frequently occurring on Fraxinus and, to a lesser extent, Betulaceae, Fagaceae and Salicaceae. Although the predominant host, Fraxinus excelsior, is common in Norway and Sweden there are apparently yet no confirmed records of the species from there. …

“This study and other data provided by Petrini & Müller (1986), Van der Gucht (1994), Rogers et al. (1999), Johannesson et al. (2000) and Stadler et al. (2001a,b) demonstrated that this fungus [D. concentrica] is widely distributed, especially in those regions of Western Europe that are under the mild influence of the Atlantic, and that it prefers Fraxinus as host. This was further confirmed in this study (see above specimen list), especially with material from Belgium in BR. Rogers et al. (1999) also reported that D. concentrica (sensu stricto) is by far the most predominant Daldinia sp. in Britain, and the collections they studied from the AJSW herbarium were mostly derived from Fraxinus.”

From: Stadler, M., Læssøe, T., Fournier, J., Decock, C., Schmieschek, B., Tichy, H. V., & Peršoh, D. (2014). A polyphasic taxonomy of_Daldinia_ (Xylariaceae). Studies in mycology, 77, 1-143. http://www.sciencedirect.com/...

Created: 2014-11-24 12:06:52 CST (-0500)
Last modified: 2014-11-26 06:39:35 CST (-0500)
Viewed: 35 times, last viewed: 2017-06-19 10:06:52 CDT (-0400)
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