Observation 129024: Nectria cinnabarina group

When: 2011-03-18

Collection location: Bovec basin, East Julian Alps, Posočje, Slovenia [Click for map]

46.3384° 13.541° 500m

Who: amadej trnkoczy (amadej)

No specimen available

Notes:
Nectria cinnabarina (perithecial stage)and Tubercularia vulgaris(conidial state)
Code: Bot_496/2011_DSC6658

Habitat: South oriented mountain slope, mixed forest, dominant Fagus sylvatica, Acer, Picea abies and other hardwood trees, calcareous ground, mostly in shade, partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 8-10 deg C, elevation 500 m (1.650 feet), alpine phytogeographical region.

Substratum: dead Acer sp. trunk and branches, still in bark

Place: Bovec basin, south of the road from Bovec to village Plužna, near Ušje place, East Julian Alps, Posočje, Slovenia EC

Comments: Both asexual conidial (Tubercularia vulgaris) and perithecial sexual state found, thousands of fruit bodies of both types present.

Nikon D700 / Nikkor Micro 105mm/f2.8 and Canon G11, 6.1-30mm/f2.8-4.5

Proposed Names

62% (2)
Eye3 Eyes3
Recognized by sight
Used references: (1) R.Phillips, Mushrooms, Macmillan (2006), p 376.
(2) http://www.rogersmushrooms.com/...
(3) M.Bon, Parey’s Buch der Pilze, Kosmos (2005), p 334.
(4) W.Rothmaler, Exkursionsflora von Deutschland, Vol.1, Niedere Pflanzen, Elsevier, 3.Auflage, (1994), p 288.
(5) S.Buczacki, Collins Fungi Guide, Collins (2012), p 598.
Based on microscopic features: Spores septated. Dimensions: 19.1 (SD = 2.5) x 7.4 (SD = 1.2) μ, Q = 2.81 (SD = 0.4), n = 30. Motic B2-211A), magnification 1.000 x, oil, in water.
28% (1)
Based on microscopic features: up to 3-septate spores

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
amadej
By: Danny Newman (myxomop)
2017-11-29 17:50:09 PST (-0800)

the comprehensiveness with which you approach every aspect of your interaction with Mushroom Observer continues to amaze and inspire me. as for the question of the specific identity of this fungus, I think there could be some benefit to passing the torch to Dr. Priscila Chaverri, who works with Nectria sensu lato among other hypocrealean fungi. her contact info may be found here:

https://psla.umd.edu//people/dr-priscila-chaverri

I would be interested to know her contributions, should she have any to offer.

Thanks for the link
By: amadej trnkoczy (amadej)
2017-11-15 13:52:01 PST (-0800)

Thank you Danny for the link to the interesting paper. I went back to my observation and analyzed again my pictures and microscopic observation. I also find some conidia on the pictures, which I was not aware off at the time of posting the observation. Here is what I observed.
Dimensions, clustering and color of perithecia seems fit well to N. nigrescens. The same is true for dimensions of sporodochia. Unfortunately, I can make no conclusion about stipe of sporodochia. I was not attentive enough in that time and my photos do not allow a conclusion regarding how much and if at all they are stipitate.
Non-septate conidia (5.9) 6 – 9.5 (9.6) x (2.2) 2.3 – 3.2 (3.3) microns; Q = (2.1) 2.3 – 3.18 (3.2); N = 13; Me = 7.9 × 2.9 microns (in the paper (4.7–)5.5–6.9(–8.4) × (1.6–)2.1–2.7(–3.0) μm) are somewhat too big but possibly still OK. The same holds for ascospore dimensions: this find (14.1) 17.1 – 23 (27.1) x (4.9) 5.2 – 7.9 (8.4) microns; N = 37 and in the paper (10.5–)13.5–18.0(–22.0) × (2.5–)3.5–5.5(–8.0) μm. However, spore and conidia dimensions of all four species N. dematiosa, N. cinnabarina, N asiatica (Asia only) and N. nigrescens treated in the paper are really close, so this trait doesn’t seem to me a strong one for determination. Many ascospores of this find are three-septate and their shape fits well to Pic.8/F, p52. This clearly speaks in favor of N. nigrescens.
But, there are also discrepancies between this find and the description of N. nigrescens in the paper. Percentage of measured ascospores regarding the number of septa according to the key (p53) is: 1-septate (91 %), 2-septate (5 %), 3-septate (4 %). This is way off what I’ve measured: 0-septate (13 %), 1-septate (57 %), 2-septate (17 %), 3-septate (13 %). I don’t know how much this is important. Q of ascospores of this find is 3.1. This is too small for N. nigrescens (Q=3.5 – look ta the picture 3., p42) and fits best to N. dematiosa clade B.
Reliable determination without the material (and possibly DNA sequencing) seems impossible, but your judgment was right, at least according to this paper and based on ascospore septa. This could be N. nigrescens.
Thanks for your comment again.
Amadej

See link
By: Danny Newman (myxomop)
2017-11-11 11:37:24 PST (-0800)

And comments in name proposal. This is a species complex.

Based on ?
By: amadej trnkoczy (amadej)
2017-11-11 02:45:11 PST (-0800)

Danny, thanks for your recent proposal. Would you be so kind and explain me on what it is based on. Just curious…

Created: 2013-02-20 02:01:57 PST (-0800)
Last modified: 2017-11-10 08:04:27 PST (-0800)
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